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@@ -1,22 +1,11 @@ GStreamer 1.18 Release Notes -These release notes are a placeholder, please bear with us while we -finish writing up the real thing. - -GStreamer 1.18.0 has not yet been released. It is scheduled for release -in late August / early September 2020. - -1.17.x is the unstable development series that is currently being -developed in the git master branch and which will eventually result in -1.18, and 1.17.90 is the current 1.18 pre-release in that series. - -1.18 will be backwards-compatible to the stable 1.16, 1.14, 1.12, 1.10, -1.8, 1.6, 1.4, 1.2 and 1.0 release series. +GStreamer 1.18.0 was originally released on 7 September 2020. See https://gstreamer.freedesktop.org/releases/1.18/ for the latest version of this document. -Last updated: Wednesday 20 August 2020, 11:00 UTC (log) +Last updated: Monday 7 September 2020, 10:30 UTC (log) Introduction @@ -29,37 +18,1052 @@ fixes and other improvements. Highlights -- FIXME +- GstTranscoder: new high level API for applications to transcode + media files from one format to another + +- High Dynamic Range (HDR) video information representation and + signalling enhancements + +- Instant playback rate change support + +- Active Format Description (AFD) and Bar Data support + +- ONVIF trick modes support in both GStreamer RTSP server and client + +- Hardware-accelerated video decoding on Windows via DXVA2 / + Direct3D11 + +- Microsoft Media Foundation plugin for video capture and + hardware-accelerated video encoding on Windows + +- qmlgloverlay: New overlay element that renders a QtQuick scene over + the top of an input video stream + +- New imagesequencesrc element to easily create a video stream from a + sequence of jpeg or png images + +- dashsink: Add new sink to produce DASH content + +- dvbsubenc: DVB Subtitle encoder element + +- TV broadcast compliant MPEG-TS muxing with constant bitrate muxing + and SCTE-35 support + +- rtmp2: new RTMP client source and sink element implementation + +- svthevcenc: new SVT-HEVC-based H.265 video encoder + +- vaapioverlay compositor element using VA-API + +- rtpmanager support for Google’s Transport-Wide Congestion Control + (twcc) RTP extension + +- splitmuxsink and splitmuxsrc gained support for auxiliary video + streams + +- webrtcbin now contains some initial support for renegotiation + involving stream addition and removal + +- New RTP source and sink elements to easily set up RTP streaming via + rtp:// URIs + +- New Audio Video Transport Protocol (AVTP) plugin for Time-Sensitive + Applications + +- Support for the Video Services Forum’s Reliable Internet Stream + Transport (RIST) TR-06-1 Simple Profile + +- Universal Windows Platform (UWP) support + +- rpicamsrc element for capturing from the Raspberry Pi camera + +- RTSP Server TCP interleaved backpressure handling improvements as + well as support for Scale/Speed headers + +- GStreamer Editing Services gained support for nested timelines, + per-clip speed rate control and the OpenTimelineIO format. + +- Autotools build system has been removed in favour of Meson Major new features and changes -Noteworthy new API +Noteworthy new features and API + +Instant playback rate changes + +Changing the playback rate as quickly as possible so far always required +a flushing seek. This generally works, but has the disadvantage of +flushing all data from the playback pipeline and requiring the demuxer +or parser to do a full-blown seek including resetting its internal state +and resetting the position of the data source. It might also require +considerable decoding effort to get to the right position to resume +playback from at the higher rate. + +This release adds a new mechanism to achieve quasi-instant rate changes +in certain playback pipelines without interrupting the flow of data in +the pipeline. This is activated by sending a seek with the +GST_SEEK_FLAG_INSTANT_RATE_CHANGE flag and start_type = stop_type = +GST_SEEK_TYPE_NONE. This flag does not work for all pipelines, in which +case it is necessary to fall back to sending a full flushing seek to +change the playback rate. When using this flag, the seek event is only +allowed to change the current rate and can modify the trickmode flags +(e.g. keyframe only or not), but it is not possible to change the +current playback position, playback direction or do a flush. + +This is particularly useful for streaming use cases like HLS or DASH +where the streaming download should not be interrupted when changing +rate. + +Instant rate changing is handled in the pipeline in a specific sequence +which is detailed in the seeking design docs. Most elements don’t need +to worry about this, only elements that sync to the clock need some +special handling which is implemented in the GstBaseSink base class, so +should be taken care of automatically in most normal playback pipelines +and sink elements. + +See Jan’s GStreamer Conference 2019 talk “Changing Playback Rate +Instantly” for more information. + +You can try this feature by passing the -i command line option to +gst-play-1.0. It is supported at least by qtdemux, tsdemux, hlsdemux, +and dashdemux. + +Google Transport-Wide Congestion Control + +rtpmanager now supports the parsing and generating of RTCP messages for +the Google Transport-Wide Congestion Control RTP Extension, as described +in: +https://tools.ietf.org/html/draft-holmer-rmcat-transport-wide-cc-extensions-01. + +This “just” provides the required plumbing/infrastructure, it does not +actually make effect any actual congestion control on the sender side, +but rather provides information for applications to use to make such +decisions. + +See Håvard’s “Google Transport-Wide Congestion Control” talk for more +information about this feature. + +GstTranscoder: a new high-level transcoding API for applications + +The new GstTranscoder library, along with transcodebin and +uritranscodebin elements, provides high level API for applications to +transcode media files from one format to another. Watch Thibault’s talk +“GstTranscoder: A High Level API to Quickly Implement Transcoding +Capabilities in your Applications” for more information. + +This also comes with a gst-transcoder-1.0 command line utility to +transcode one URI into another URI based on the specified encoding +profile. + +Active Format Description (AFD) and Bar Data support + +The GstVideo Ancillary Data API has gained support for Active Format +Description (AFD) and Bar data. + +This includes various two new buffer metas: GstVideoAFDMeta and +GstVideoBarMeta. + +GStreamer now also parses and extracts AFD/Bar data in the h264/h265 +video parsers, and supports both capturing them and outputting them in +the decklink elements. See Aaron’s lightning talk at the GStreamer +Conference for more background. + +ONVIF trick modes support in both GStreamer RTSP server and client + +- Support for the various trick modes described in section 6 of the + ONVIF streaming spec has been implemented in both gst-rtsp-server + and rtspsrc. +- Various new properties in rtspsrc must be set to take advantage of + the ONVIF support +- Examples are available here: test-onvif-server.c and + test-onvif-client.c +- Watch Mathieu Duponchelle’s talk “Implementing a Trickmode Player + with ONVIF, RTSP and GStreamer” for more information and a live + demo. + +GStreamer Codecs library with decoder base classes + +This introduces a new library in gst-plugins-bad which contains a set of +base classes that handle bitstream parsing and state tracking for the +purpose of decoding different codecs. Currently H264, H265, VP8 and VP9 +are supported. These bases classes are meant primarily for internal use +in GStreamer and are used in various decoder elements in connection with +low level decoding APIs like DXVA, NVDEC, VAAPI and V4L2 State Less +decoders. The new library is named gstreamer-codecs-1.0 / +libgstcodecs-1.0 and is not yet guaranteed to be API stable across major +versions. + +MPEG-TS muxing improvements + +The GStreamer MPEG-TS muxer has seen major improvements on various +fronts in this cycle: + +- It has been ported to the GstAggregator base class which means it + can work in defined-latency mode with live input sources and + continue streaming if one of the inputs stops producing data. + +- atscmux, a new ATSC-specific tsmux subclass + +- Constant Bit Rate (CBR) muxing support via the new bitrate property + which allows setting the target bitrate in bps. If this is set the + muxer will insert null packets as padding to achieve the desired + multiplex-wide constant bitrate. + +- compliance fixes for TV broadcasting use cases (esp. ATSC). See + Jan’s talk “TV Broadcast compliant MPEG-TS” for details. + +- Streams can now be added and removed at runtime: Until now, any + streams in tsmux had to be present when the element started + outputting its first buffer. Now they can appear at any point during + the stream, or even disappear and reappear later using the same PID. + +- new pcr-interval property allows applications to configure the + desired interval instead of hardcoding it + +- basic SCTE-35 support. This is enabled by setting the scte-35-pid + property on the muxer. Sending SCTE-35 commands is then done by + creating the appropriate SCTE-35 GstMpegtsSection and sending them + on the muxer. + +- MPEG-2 AAC handling improvements + +New elements + +- New qmlgloverlay element for rendering a QtQuick scene over the top + of a video stream. qmlgloverlay requires that Qt support adopting an + external OpenGL context and is known to work on X11 and Windows. + Wayland is known not to work due to limitations within Qt. Check out + the example to see how it works. + +- The clocksync element is a generic element that can be placed in a + pipeline to synchronise passing buffers to the clock at that point. + This is similar to identity sync=true, but because it isn’t + GstBaseTransform-based, it can process GstBufferLists without + breaking them into separate GstBuffers. It is also more discoverable + than the identity option. Note that you do not need to insert this + element into your pipeline to make GStreamer sync to the pipeline + clock, this is usually handled automatically by the elements in the + pipeline (sources and sinks mostly). This element is useful to feed + non-live input such as local files into elements that expect live + input such as webrtcbin.` + +- New imagesequencesrc element to easily create a video stream from a + sequence of JPEG or PNG images (or any other encoding where the type + can be detected), basically a multifilesrc made specifically for + image sequences. + +- rpicamsrc element for capturing raw or encoded video (H.264, MJPEG) + from the Raspberry Pi camera. This works much like the popular + raspivid command line utility but outputs data nicely timestamped + and formatted in order to integrate nicely with other GStreamer + elements. Also comes with a device provider so applications can + discover the camera if available. + +- aatv and cacatv video filters that transform video ASCII art style + +- avtp: new Audio Video Transport Protocol (AVTP) plugin for Linux. + See Andre Guedes’ talk “Audio/Video Bridging (AVB) support in + GStreamer” for more details. + +- clockselect: a pipeline element that enables clock selection/forcing + via gst-launch pipeline syntax. + +- dashsink: Add new sink to produce DASH content. See Stéphane’s talk + or blog post for details. + +- dvbsubenc: a DVB subtitle encoder element + +- microdns: a libmicrodns-based mdns device provider to discover RTSP + cameras on the local network + +- mlaudiosink: new audio sink element for the Magic Leap platform, + accompanied by an MLSDK implementation in the amc plugin + +- msdkvp9enc: VP9 encoder element for the Intel MediaSDK + +- rist: new plugin implementing support for the Video Services Forum’s + Reliable Internet Stream Transport (RIST) TR-06-1 Simple Profile. + See Nicolas’ blog post “GStreamer support for the RIST + Specification” for more details. + +- rtmp2: new RTMP client source and sink elements with fully + asynchronous network operations, better robustness and additional + features such as handling ping and stats messages, and adobe-style + authentication. The new rtmp2src and rtmp2sink elements should be + API-compatible with the old rtmpsrc / rtmpsink elements and should + work as drop-in replacements. -- FIXME +- new RTP source and sink elements to easily set up RTP streaming via + rtp:// URIs: The rtpsink and rtpsrc elements add an URI interface so + that streams can be decoded with decodebin using rtp:// URIs. These + can be used as follows: ``` gst-launch-1.0 videotestsrc ! x264enc ! + rtph264pay config-interval=3 ! rtpsink uri=rtp://239.1.1.1:1234 -New Elements + gst-launch-1.0 videotestsrc ! x264enc ! rtph264pay config-interval=1 + ! rtpsink uri=rtp://239.1.2.3:5000 gst-launch-1.0 rtpsrc + uri=rtp://239.1.2.3:5000?encoding-name=H264 ! rtph264depay ! + avdec_h264 ! videoconvert ! xvimagesink -- FIXME + gst-launch-1.0 videotestsrc ! avenc_mpeg4 ! rtpmp4vpay + config-interval=1 ! rtpsink uri=rtp://239.1.2.3:5000 gst-launch-1.0 + rtpsrc uri=rtp://239.1.2.3:5000?encoding-name=MP4V-ES ! rtpmp4vdepay + ! avdec_mpeg4 ! videoconvert ! xvimagesink ``` + +- svthevcenc: new SVT-HEVC-based H.265 video encoder + +- switchbin: new helper element which chooses between a set of + processing chains (paths) based on input caps, and changes the + active chain if new caps arrive. Paths are child objects, which are + accessed by the GstChildProxy interface. See the switchbin + documentation for a usage example. + +- vah264dec: new experimental va plugin with an element for H.264 + decoding with VA-API using GStreamer’s new stateless decoder + infrastructure (see Linux section below). + +- v4l2codecs: introduce an V4L2 CODECs Accelerator supporting the new + CODECs uAPI in the Linux kernel (see Linux section below) + +- zxing new plugin to detect QR codes and barcodes, based on libzxing + +- also see the Rust plugins section below which contains plenty of new + exciting plugins written in Rust! New element features and additions -- FIXME +GStreamer core + +- filesink: Add a new “full” buffer mode. Previously the default and + full modes were the same. Now the default mode is like before: it + accumulates all buffers in a buffer list until the threshold is + reached and then writes them all out, potentially in multiple + writes. The new full mode works by always copying memory to a single + memory area and writing everything out with a single write once the + threshold is reached. + +- multiqueue: Add stats property and + current-level-{buffers, bytes, time} pad properties to query the + current levels of the corresponding internal queue. + +Plugins Base + +- alsa: implement a device provider + +- alsasrc: added use-driver-timestamp property to force use of + pipeline timestamps (and disable driver timestamps) if so desired + +- audioconvert: fix changing the mix-matrix property at runtime + +- appsrc: added support for segment forwarding or custom GstSegments + via GstSample, enabled via the handle-segment-change property. This + only works for segments in TIME format for now. + +- compositor: various performance optimisations, checkerboard drawing + fixes, and support for VUYA format + +- encodebin: Fix and refactor smart encoding; ensure that a single + segment is pushed into encoders; improve force-key-unit event + handling. + +- opusenc: Add low delay option (audio-type=restricted-lowdelay) to + disable the SILK layer and achieve only 5ms delay. + +- opusdec: add stats property to retrieve various decoder statistics. + +- uridecodebin3: Let decodebin3 do its stream selection if no one + answers + +- decodebin3: Avoid overriding explicit user selection of streams + +- playbin: add flag to force use of software decoders over any + hardware decoders that might also be available + +- playbin3, playbin: propagate sink context + +- rawvideoparse: Fix tiling support, allow setting colorimetry + +- subparse: output plain utf8 text instead of pango-markup formatted + text if downstream requires it, useful for interop with elements + that only accept utf8-formatted subtitles such as muxers or closed + caption converters. + +- tcpserversrc, tcpclientsrc: add stats property with TCP connection + stats (some are only available on Linux though) + +- timeoverlay: add show-times-as-dates, datetime-format and + datetime-epoch properties to display times with dates + +- videorate: Fix changing rate property during playback; reverse + playback fixes; update QoS events taking into account our rate + +- videoscale: pass through and transform size sensitive metas instead + of just dropping them + +Plugins Good + +- avidemux can handle H.265 video now. Our advice remains to + immediately cease all contact and communication with anyone who + hands you H.265 video in an AVI container, however. + +- avimux: Add support for S24LE and S32LE raw audio and v210 raw video + formats; support more than 2 channels of raw audio. + +- souphttpsrc: disable session sharing and cookie jar when the cookies + property is set; correctly handle seeks past the end of the content + +- deinterlace: new YADIF deinterlace method which should provide + better quality than the existing methods and is LGPL licensed; + alternate fields are supported as input to the deinterlacer as well + now, and there were also fixes for switching the deinterlace mode on + the fly. + +- flvmux: in streamable mode allow adding new pads even if the initial + header has already been written. Old clients will only process the + initial stream, new clients will get a header with the new streams. + The skip-backwards-streams property can be used to force flvmux to + skip and drop a few buffers rather than produce timestamps that go + backward and confuse librtmp-based clients. There’s also better + handling for timestamp rollover when streaming for a long time. + +- imagefreeze: Add live mode, which can be enabled via the new is-live + property. In this mode frames will only be output in PLAYING state + according to the negotiated framerate, skipping frames if the output + can’t keep up (e.g. because it’s blocked downstream). This makes it + possible to actually use imagefreeze in live pipelines without + having to manually ensure somehow that it starts outputting at the + current running time and without still risking to fall behind + without recovery. + +- matroskademux, qtdemux: Provide audio lead-in for some lossy formats + when doing accurate seeks, to make sure we can actually decode + samples at the desired position. This is especially important for + non-linear audio/video editing use-cases. + +- matroskademux, matroskamux: Handle interlaced field order (tff, bff) + +- matroskamux: + + - new offset-to-zero property to offset all streams to start at + zero. This takes the timestamp of the earliest stream and + offsets it so that it starts at 0. Some software (VLC, + ffmpeg-based) does not properly handle Matroska files that start + at timestamps much bigger than zero, which could happen with + live streams. + - added a creation-time property to explicitly set the creation + time to write into the file headers. Useful when remuxing, for + example, but also for live feeds where the DateUTC header can be + set a UTC timestamp corresponding to the beginning of the file. + - the muxer now also always waits for caps on sparse streams, and + warns if caps arrive after the header has already been sent, + otherwise the subtitle track might be silently absent in the + final file. This might affect applications that send sparse data + into matroskamux via an appsrc element, which will usually not + send out the initial caps before it sends out the first buffer. + +- pulseaudio: device provider improvements: fix discovery of + newly-added devices and hide the alsa device provider if we provide + alsa devices + +- qtdemux: raw audio handling improvements, support for AC4 audio, and + key-units trickmode interval support + +- qtmux: + + - was ported to the GstAggregator base class which allows for + better handling of live inputs, but might entail minor + behavioural changes for sparse inputs if inputs are not live. + - has also gained a force-create-timecode-trak property to create + a timecode trak in non-mov flavors, which may not be supported + by Apple but is supported by other software such as Final Cut + Pro X + - also a force-chunks property to force the creation of chunks + even in single-stream files, which is required for Apple ProRes + certification. + - also supports 8k resolutions in prefill mode with ProRes. + +- rtpbin gained a request-jitterbuffer signal which allows + applications to plug in their own jitterbuffer implementation such + as the threadsharing jitterbuffer from the Rust plugins, for + example. + +- rtprtxsend: add clock-rate-map property to allow generic RTP input + caps without a clock-rate whilst still supporting the max-size-time + property for bundled streams. + +- rtpssrcdemux: introduce max-streams property to guard against + attacks where the sender changes SSRC for every RTP packet. + +- rtph264pay, rtph264pay: implement STAP-A and various aggregation + modes controled by the new aggegrate-mode property: none to not + aggregate NAL units (as before), zero-latency to aggregate NAL units + until a VCL or suffix unit is included, or max to aggregate all NAL + units with the same timestamp (which adds one frame of latency). The + default has been kept at none for backwards compatibility reasons + and because various RTP/RTSP implementions don’t handle aggregation + well. For WebRTC use cases this should be set to zero-latency, + however. + +- rtpmp4vpay: add support for config-interval=-1 to resend headers + with each IDR keyframe, like other video payloaders. + +- rtpvp8depay: Add wait-for-keyframe property for waiting until the + next keyframe after packet loss. Useful if the video stream was not + encoded with error resilience enabled, in which case packet loss + tends to cause very bad artefacts when decoding, and waiting for the + next keyframe instead improves user experience considerably. + +- splitmuxsink and splitmuxsrc can now handle auxiliary video streams + in addition to the primary video stream. The primary video stream is + still used to select fragment cut points at keyframe boundaries. + Auxilliary video streams may be broken up at any packet - so + fragments may not start with a keyframe for those streams. + +- splitmuxsink: + + - new muxer-preset and sink-preset properties for setting + muxer/sink presets + - a new start-index property to set the initial fragment id + - and a new muxer-pad-map property which explicitly maps + splitmuxsink pads to the muxer pads they should connect to, + overriding the implicit logic that tries to match pads but + yields arbitrary names. + - Also includes the actual sink element in the fragment-opened and + fragment-closed element messages now, which is especially useful + for sinks without a location property or when finalisation of + the fragments is done asynchronously. + +- videocrop: add support for Y444, Y41B and Y42B pixel formats + +- vp8enc, vp9enc: change default value of VP8E_SET_STATIC_THRESHOLD + from 0 to 1 which matches what Google WebRTC does and results in + lower CPU usage; also added a new bit-per-pixel property to select a + better default bitrate + +- v4l2: add support for ABGR, xBGR, RGBA, and RGBx formats and for + handling interlaced video in alternate fields interlace mode (one + field per buffer instead of one frame per picture with both fields + interleaved) + +- v4l2: Profile and level probing support for H264, H265, MPEG-4, + MPEG-2, VP8, and VP9 video encoders and decoders + +Plugins Ugly + +- asfdemux: extract more metadata: disc number and disc count + +- x264enc: + + - respect YouTube bitrate recommendation when user sets the + YouTube profile preset + - separate high-10 video formats from 8-bit formats to improve + depth negotiation and only advertise suitable input raw formats + for the desired output depth + - forward downstream colorimetry and chroma-site restrictions to + upstream elements + - support more color primaries/mappings + +Plugins Bad + +- av1enc: add threads, row-mt and tile-{columns,rows} properties for + this AOMedia AV1 encoder + +- ccconverter: implement support for CDP framerate conversions + +- ccextractor: Add remove-caption-meta property to remove caption + metas from the outgoing video buffers + +- decklink: add support for 2K DCI video modes, widescreen NTSC/PAL, + and for parsing/outputting AFD/Bar data. Also implement a simple + device provider for Decklink devices. + +- dtlsrtpenc: add rtp-sync property which synchronises RTP streams to + the pipeline clock before passing them to funnel for merging with + RTCP. + +- fdkaac: also decode MPEG-2 AAC; encoder now supports more + multichannel/surround sound layouts + +- hlssink2: add action signals for custom playlist/fragment handling: + Instead of always going through the file system API we allow the + application to modify the behaviour. For the playlist itself and + fragments, the application can provide a GOutputStream. In addition + the sink notifies the application whenever a fragment can be + deleted. + +- interlace: can now output data in alternate fields mode; added field + switching mode for 2:2 field pattern + +- iqa: Add a mode property to enable strict mode that checks that all + the input streams have the exact same number of frames; also + implement the child proxy interface + +- mpeg2enc: add disable-encode-retries property for lower CPU usage + +- mpeg4videoparse: allow re-sending codec config at IDR via + config-interval=-1 + +- mpegtsparse: new alignment property to determine number of TS + packets per output buffer, useful for feeding an MPEG-TS stream for + sending via udpsink. This can be used in combination with the + split-on-rai property that makes sure to start a new output buffer + for any TS packet with the Random Access Indicator set. Also set + delta unit buffer flag on non-random-access buffers. + +- mpegdemux: add an ignore-scr property to ignore the SCR in + non-compliant MPEG-PS streams with a broken SCR, which will work as + long as PTS/DTS in the PES header is consistently increasing. + +- tsdemux: + + - add an ignore-pcr property to ignore MPEG-TS streams with broken + PCR streams on which we can’t reliably recover correct + timestamps. + - new latency property to allow applications to lower the + advertised worst-case latency of 700ms if they know their + streams support this (must have timestamps in higher frequency + than required by the spec) + - support for AC4 audio + +- msdk - Intel Media SDK plugin for hardware-accelerated video + decoding and encoding on Windows and Linux: + + - mappings for more video formats: Y210, Y410, P012_LE, Y212_LE + - encoders now support bitrate changes and input format changes in + playing state + - msdkh264enc, msdkh265enc: add support for CEA708 closed caption + insertion + - msdkh264enc, msdkh265enc: set Region of Interest (ROI) region + from ROI metas + - msdkh264enc, msdkh265enc: new tune property to enable low-power + mode + - msdkh265enc: add support 12-bit 4:2:0 encoding and 8-bit 4:2:2 + encoding and VUYA, Y210, and Y410 as input formats + - msdkh265enc: add support for screen content coding extension + - msdkh265dec: add support for main-12/main-12-intra, + main-422-10/main-422-10-intra 10bit, + main-422-10/main-422-10-intra 8bit, + main-422-12/main-422-12-intra, main-444-10/main-444-10-intra, + main-444-12/main-444-12-intra, and main-444 profiles + - msdkvp9dec: add support for 12-bit 4:4:4 + - msdkvpp: add support for Y410 and Y210 formats, cropping via + properties, and a new video-direction property. + +- mxf: Add support for CEA-708 CDP from S436 essence tracks. mxfdemux + can now handle Apple ProRes + +- nvdec: add H264 + H265 stateless codec implementation nvh264sldec + and nvh265sldec with fewer features but improved latency. You can + set the environment variable GST_USE_NV_STATELESS_CODEC=h264 to use + the stateless decoder variant as nvh264dec instead of the “normal” + NVDEC decoder implementation. + +- nvdec: add support for 12-bit 4:4:4/4:2:0 and 10-bit 4:2:0 decoding + +- nvenc: + + - add more rate-control options, support for B-frame encoding (if + device supports it), an aud property to toggle Access Unit + Delimiter insertion, and qp-{min,max,const}-{i,p,b} properties. + - the weighted-pred property enables weighted prediction. + - support for more input formats, namely 8-bit and 10-bit RGB + formats (BGRA, RGBA, RGB10A2, BGR10A2) and YV12 and VUYA. + - on-the-fly resolution changes are now supported as well. + - in case there are multiple GPUs on the system, there are also + per-GPU elements registered now, since different devices will + have different capabilities. + - nvh265enc can now support 10-bit YUV 4:4:4 encoding and 8-bit + 4:4:4 / 10-bit 4:2:0 formats up to 8K resolution (with some + devices). In case of HDR content HDR related SEI nals will be + inserted automatically. + +- openjpeg: enable multi-threaded decoding and add support for + sub-frame encoding (for lower latency) + +- rtponviftimestamp: add opt-out “drop-out-of-segment” property + +- spanplc: new stats property + +- srt: add support for IPv6 and for using hostnames instead of IP + addresses; add streamid property, but also allow passing the id via + the stream URI; add wait-for-connection property to srtsink + +- timecodestamper: this element was rewritten with an updated API + (properties); it has gained many new properties, seeking support and + support for linear timecode (LTC) from an audio stream. + +- uvch264src now comes with a device provider to advertise available + camera sources that support this interface (mostly Logitech C920s) + +- wpe: Add software rendering support and support for mouse scroll + events + +- x265enc: support more 8/10/12 bits 4:2:0, 4:2:2 and 4:4:4 profiles; + add support for mastering display info and content light level + encoding SEIs + +gst-libav + +- Add mapping for SpeedHQ video codec used by NDI + +- Add mapping for aptX and aptX-HD + +- avivf_mux: support VP9 and AV1 + +- avvidenc: shift output buffer timestamps and output segment by 1h + just like x264enc does, to allow for negative DTS. + +- avviddec: Limit default number of decoder threads on systems with + more than 16 cores, as the number of threads used in avdec has a + direct impact on the latency of the decoder, which is of as many + frames as threads, so a large numbers of threads can make for + latency levels that can be problematic in some applications. + +- avviddec: Add thread-type property that allows applications to + specify the preferred multithreading method (auto, frame, slice). + Note that thread-type=frame may introduce additional latency + especially in live pipelines, since it introduces a decoding delay + of number of thread frames. Plugin and library moves -- FIXME +- There were no plugin moves or library moves in this cycle. + +- The rpicamsrc element was moved into -good from an external + repository on github. Plugin removals -The following plugins have been removed from gst-plugins-bad: +The following elements or plugins have been removed: -- FIXME +- The yadif video deinterlacing plugin from gst-plugins-bad, which was + one of the few GPL licensed plugins, has been removed in favour of + deinterlace method=yadif. -Miscellaneous API additions +- The avdec_cdgraphics CD Graphics video decoder element from + gst-libav was never usable in GStreamer and we now have a cdgdec + element written in Rust in gst-plugins-rs to replace it. + +- The VDPAU plugin has been unmaintained and unsupported for a very + long time and does not have the feature set we expect from + hardware-accelerated video decoders. It’s been superseded by the + nvcodec plugin leveraging NVIDIA’s NVDEC API. -- FIXME +Miscellaneous API additions -Miscellaneous performance and memory optimisations +GStreamer core + +- gst_task_resume(): This new API allows resuming a task if it was + paused, while leaving it in stopped state if it was stopped or not + started yet. This can be useful for callback-based driver workflows, + where you basically want to pause and resume the task when buffers + are notified while avoiding the race with a gst_task_stop() coming + from another thread. + +- info: add printf extensions GST_TIMEP_FORMAT and GST_STIMEP_FORMAT + for printing GstClockTime/GstClockTimeDiff pointers, which is much + more convenient to use in debug log statements than the usual + GST_TIME_FORMAT-followed-by-GST_TIME_ARGS dance. Also add an + explicit GST_STACK_TRACE_SHOW_NONE enum value. + +- gst_element_get_current_clock_time() and + gst_element_get_current_running_time(): new helper functions for + getting an element clock’s time, and the clock time minus base time, + respectively. Useful when adding additional input branches to + elements such as compositor, audiomixer, flvmux, interleave or + input-selector to determine initial pad offsets and such. + +- seeking: Add GST_SEEK_FLAG_TRICKMODE_FORWARD_PREDICTED to just skip + B-frames during trick mode, showing both keyframes + P-frame, and + add support for it in h264parse and h265parse. + +- elementfactory: add GST_ELEMENT_FACTORY_TYPE_HARDWARE to allow + elements to advertise that they are hardware-based or interact with + hardware. This has multiple applications: + + - it makes it possible to easily differentiate hardware and + software based element implementations such as audio or video + encoders and decoders. This is useful in order to force the use + of software decoders for specific use cases, or to check if a + selected decoder is actually hardware-accelerated or not. + - elements interacting with hardware and their respective drivers + typically don’t know the actually supported capabilities until + the element is set into at least READY state and can open a + device handle and probe the hardware. + +- gst_uri_from_string_escaped(): identical to gst_uri_from_string() + except that the userinfo and fragment components of the URI will not + be unescaped while parsing. This is needed for correctly parsing + usernames or passwords with : in them . + +- paramspecs: new GstParamSpec flag GST_PARAM_CONDITIONALLY_AVAILABLE + to indicate that a property might not always exist. + +- gst_bin_iterate_all_by_element_factory_name() finds elements in a + bin by factory name + +- pad: gst_pad_get_single_internal_link() is a new convenience + function to return the single internal link of a pad, which is + useful e.g. to retrieve the output pad of a new multiqueue request + pad. + +- datetime: Add constructors to create datetimes with timestamps in + microseconds, gst_date_time_new_from_unix_epoch_local_time_usecs() + and gst_date_time_new_from_unix_epoch_utc_usecs(). + +- gst_debug_log_get_lines() gets debug log lines formatted in the same + way the default log handler would print them + +- GstSystemClock: Add GST_CLOCK_TYPE_TAI as GStreamer abstraction for + CLOCK_TAI, to support transmission offloading features where network + packets are timestamped with the time they are deemed to be actually + transmitted. Useful in combination with the new AVTP plugin. + +- miscellaneous utility functions: gst_clear_uri(), + gst_structure_take(). + +- harness: Added gst_harness_pull_until_eos() + +- GstBaseSrc: + + - gst_base_src_new_segment() allows subclasses to update the + segment to be used at runtime from the ::create() function. This + deprecates gst_base_src_new_seamless_segment() + - gst_base_src_negotiate() allows subclasses to trigger format + renegotiation at runtime from inside the ::create() or ::alloc() + function + +- GstBaseSink: new stats property and gst_base_sink_get_stats() method + to retrieve various statistics such as average frame rate and + dropped/rendered buffers. + +- GstBaseTransform: gst_base_transform_reconfigure() is now public + API, useful for subclasses that need to completely re-implement the + ::submit_input_buffer() virtual method + +- GstAggregator: + + - gst_aggregator_update_segment() allows subclasses to update the + output segment at runtime. Subclasses should use this function + rather than push a segment event onto the source pad directly. + - new sample selection API: + - subclasses should now call gst_aggregator_selected_samples() + from their ::aggregate() implementation to signal that they + have selected the next samples they will aggregate + - GstAggregator will then emit the samples-selected signal + where handlers can then look up samples per pad via + gst_aggregator_peek_next_sample(). + - This is useful for example to atomically update input pad + properties in mixer subclasses such as compositor. + Applications can now update properties with precise control + of when these changes will take effect, and for which input + buffer(s). + - gst_aggregator_finish_buffer_list() allows subclasses to push + out a buffer list, improving efficiency in some cases. + - a ::negotiate() virtual method was added, for consistency with + other base classes and to allow subclasses to completely + override the negotiation behaviour. + - the new ::sink_event_pre_queue() and ::sink_query_pre_queue() + virtual methods allow subclasses to intercept or handle + serialized events and queries before they’re queued up + internally. + +GStreamer Plugins Base Libraries + +Audio library + +- audioaggregator, audiomixer: new output-buffer-duration-fraction + property which allows use cases such as keeping the buffers output + by compositor on one branch and audiomixer on another perfectly + aligned, by requiring the compositor to output a n/d frame rate, and + setting output-buffer-duration-fraction to d/n on the audiomixer. + +- GstAudioDecoder: new max-errors property so applications can + configure at what point the decoder should error out, or tell it to + just keep going + +- gst_audio_make_raw_caps() and gst_audio_formats_raw() are + bindings-friendly versions of the GST_AUDIO_CAPS_MAKE() C macro. + +- gst_audio_info_from_caps() now handles encoded audio formats as well + +PbUtils library + +- GstEncodingProfile: + - Do not restrict number of similar profiles in a container + - add GstValue serialization function +- codec utils now support more H.264/H.265 profiles/levels and have + improved extension handling + +RTP library + +- rtpbasepayloader: Add scale-rtptime property for scaling RTP + timestamp according to the segment rate (equivalent to RTSP speed + parameter). This is useful for ONVIF trickmodes via RTSP. + +- rtpbasepayload: add experimental property for embedding twcc + sequencenumbers for Transport-Wide Congestion Control (gated behind + the GST_RTP_ENABLE_EXPERIMENTAL_TWCC_PROPERTY environment + variable) - more generic API for enabling this is expected to land + in the next development cycle. + +- rtcpbuffer: add RTPFB_TYPE_TWCC for Transport-Wide Congestion + Control + +- rtpbuffer: add + gst_rtp_buffer_get_extension_onebyte_header_from_bytes()``, so that one can parse theGBytes` + returned by gst_rtp_buffer_get_extension_bytes() + +- rtpbasedepayload: Add max-reorder property to make the + previously-hardcoded value when to consider a sender to have + restarted configurable. In some scenarios it’s particularly useful + to set max-reorder=0 to disable the behaviour that the depayloader + will drop packets: when max-reorder is set to 0 all + reordered/duplicate packets are considered coming from a restarted + sender. + +RTSP library + +- add gst_rtsp_url_get_request_uri_with_control() to create request + uri combined with control url + +- GstRTSPConnection: add the possibility to limit the Content-Length + for RTSP messages via + gst_rtsp_connection_set_content_length_limit(). The same + functionality is also exposed in gst-rtsp-server. + +SDP library + +- add support for parsing the extmap attribute from caps and storing + inside caps The extmap attribute allows mapping RTP extension header + IDs to well-known RTP extension header specifications. See RFC8285 + for details. + +Tags library + +- update to latest iso-code and support more languages + +- add tags for acoustid id & acoustid fingerprint, plus MusicBrainz ID + handling fixes + +Video library + +- High Dynamic Range (HDR) video information representation and + signalling enhancements: + + - New APIs for HDR video information representation and + signalling: + - GstVideoMasteringDisplayInfo: display color volume info as + per SMPTE ST 2086 + - GstVideoContentLightLevel: content light level specified in + CEA-861.3, Appendix A. + - plus functions to serialise/deserialise and add them to or + parse them from caps + - gst_video_color_{matrix,primaries,transfer}_{to,from}_iso(): + new utilility functions for conversion from/to ISO/IEC + 23001-8 + - add ARIB STD-B67 transfer chracteristic function + - add SMPTE ST 2084 support and BT 2100 colorimetry + - define bt2020-10 transfer characteristics for clarity: + bt707, bt2020-10, and bt2020-12 transfer characteristics are + functionally identical but have their own unique values in + the specification. + - h264parse, h265parse: Parse mastering display info and content + light level from SEIs. + - matroskademux: parse HDR metadata + - matroskamux: Write MasteringMetadata and Max{CLL,FALL}. Enable + muxing with HDR meta data if upstream provided it + - avviddec: Extract HDR information if any and map bt2020-10, PQ + and HLG transfer functions + +- added bt601 transfer function (for completeness) + +- support for more pixel formats: + + - Y412 (packed 12 bits 4:4:4:4) + - Y212 (packed 12 bits 4:2:2) + - P012 (semi-planar 4:2:0) + - P016_{LE,BE} (semi-planar 16 bits 4:2:0) + - Y444_16{LE,BE} (planar 16 bits 4:4:4) + - RGB10A2_LE (packed 10-bit RGB with 2-bit alpha channel) + - NV12_32L32 (NV12 with 32x32 tiles in linear order) + - NV12_4L4 (NV12 with 4x4 tiles in linear order) + +- GstVideoDecoder: + + - new max-errors property so applications can configure at what + point the decoder should error out, or tell it to just keep + going + + - new qos property to disable dropping frames because of QoS, and + post QoS messages on the bus when dropping frames. This is + useful for example in a scenario where the decoded video is + tee-ed off to go into a live sink that syncs to the clock in one + branch, and an encoding and save to file pipeline in the other + branch. In that case one wouldn’t want QoS events from the video + sink make the decoder drop frames because that would also leave + gaps in the encoding branch then. + +- GstVideoEncoder: + + - gst_video_encoder_finish_subframe() is new API to push out + subframes (e.g. slices), so encoders can split the encoding into + subframes, which can be useful to reduce the overall end-to-end + latency as we no longer need to wait for the full frame to be + encoded to start decoding or sending out the data. + - new min-force-key-unit-interval property allows configuring the + minimum interval between force-key-unit requests and prevents a + big bitrate increase if a lot of key-units are requested in a + short period of time (as might happen in live streaming RTP + pipelines when packet loss is detected). + - various force-key-unit event handling fixes + +- GstVideoAggregator, compositor, glvideomixer: expose + max-last-buffer-repeat property on pads. This can be used to have a + compositor display either the background or a stream on a lower + zorder after a live input stream freezes for a certain amount of + time, for example because of network issues. + +- gst_video_format_info_component() is new API to find out which + components are packed into a given plane, which is useful to prevent + us from assuming a 1-1 mapping between planes and components. + +- gst_video_make_raw_caps() and gst_video_formats_raw() are + bindings-friendly versions of the GST_VIDEO_CAPS_MAKE() C macro. + +- video-blend: Add support for blending on top of 16 bit per component + formats, which makes sure we can support every currently supported + raw video format for blending subtitles or logos on top of video. + +- GST_VIDEO_BUFFER_IS_TOP_FIELD() and + GST_VIDEO_BUFFER_IS_BOTTOM_FIELD() convenience macros to check + whether the video buffer contains only the top field or bottom field + of an interlaced picture. + +- GstVideoMeta now includes an alignment field with the + GstVideoAlignment so buffer producers can explicitly specify the + exact geometry of the planes, allowing users to easily know the + padded size and height of each plane. Default values will be used if + this is not set. + + Use gst_video_meta_set_alignment() to set the alignment and + gst_video_meta_get_plane_size() or gst_video_meta_get_plane_height() + to compute the plane sizes or plane heights based on the information + in the video meta. + +- gst_video_info_align_full() works like gst_video_info_align() but + also retrieves the plane sizes. + +MPEG-TS library + +- support for SCTE-35 sections + +- extend support for ATSC tables: + + - System Time Table (STT) + - Master Guide Table (MGT) + - Rating Region Table (RRT) + +Miscellaneous performance, latency and memory optimisations As always there have been many performance and memory usage improvements across all components and modules. Some of them have already been @@ -69,63 +1073,654 @@ The following list is only a small snapshot of some of the more interesting optimisations that haven’t been mentioned in other contexts yet: -- FIXME +- caps negotiation, structure and GValue performance optimizations + +- systemclock: clock waiting performance improvements (moved from + GstPoll to GCond for waiting), especially on Windows. + +- rtpsession: add support for buffer lists on the recv path for better + performance with higher packet rate streams. + +- rtpjitterbuffer: internal timer handling has been rewritten for + better performance, see Nicolas’ talk “Revisiting RTP Jitter Buffer + Timers” for more details. + +- H.264/H.265 parsers and RTP payloaders/depayloaders have been + optimised for latency to make sure data is processed and pushed out + as quickly as possible + +- video-scaler: correctness and performance improvements, esp. for + interlaced formats and GBRA + +- GstVideoEncoder has gained new API to push out subframes + (e.g. slices), so encoders can split the encoding into subframes, + which can be useful to reduce the overall end-to-end latency as we + no longer need to wait for the full frame to be encoded to start + decoding or sending out the data. + + This is complemented by the new GST_VIDEO_BUFFER_FLAG_MARKER which + is a video-specific buffer flag to mark the end of a video frame, so + elements can know that they have received all data for a frame + without waiting for the beginning of the next frame. This is similar + to how the RTP marker flag is used in many RTP video mappings. + + The video encoder base class now also releases the internal stream + lock before pushing out data, so as to not block the input side of + things from processing more data in the meantime. + +Miscellaneous other changes and enhancements + +- it is now possible to modify the initial rank of plugin features + without modifying the source code or writing code to do so + programmatically via the GST_PLUGIN_FEATURE_RANK environment + variable. Users can adjust the rank of plugin(s) by passing a + comma-separated list of feature:rank pairs where rank can be a + numerical value or one of NONE, MARGINAL, SECONDARY, PRIMARY, and + MAX. Example: GST_PLUGIN_FEATURE_RANK=myh264dec:MAX,avdec_h264:NONE + sets the rank of the myh264dec element feature to the maximum and + that of avdec_h264 to 0 (none), thus ensuring that myh264dec is + prefered as H264 decoder in an autoplugging context. + +- GstDeviceProvider now does a static probe on start as fallback for + providers that don’t support dynamic probing to make things easier + for users + +WebRTC + +- webrtcbin now contains initial support for renegotiation involving + stream addition and removal. There are a number of caveats to this + initial renegotiation support and many complex scenarios are known + to require some work. + +- webrtcbin now exposes the internal ICE object for advanced + configuration options. Using the internal ICE object, it is possible + to toggle UDP or TCP connection usage as well as provide local + network addresses. -GstPlayer +- Fix a number of call flows within webrtcbin’s GstPromise handling + where a promise was never replied to. This has been fixed and now a + promise will always receive a reply. -- FIXME +- webrtcbin now exposes a latency property for configuring the + internal rtpjitterbuffer latency and buffering when receiving + streams. -Miscellaneous changes +- webrtcbin now only synchronises the RTP part of a stream, allowing + RTCP messages to skip synchronisation entirely. -- FIXME +- Fixed most of the webrtcbin state properties (connection-state, + ice-connection-state, signaling-state, but not ice-gathering-state + as that requires newer API in libnice and will be fixed in the next + release series) to advance through the state values correctly. Also + implemented DTLS connection states in the DTLS elements so that + peer-connection-state is not always new. + +- webrtcbin now accounts for the a=ice-lite attribute in a remote SDP + offer and will configure the internal ICE implementation + accordingly. + +- webrtcbin will now resolve .local candidate addresses using the + system DNS resolver. .local candidate addresses are now produced by + web browsers to help protect the privacy of users. + +- webrtcbin will now add candidates found in the SDP to the internal + ICE agent. This was previously unsupported and required using the + add-ice-candidate signal manually from the application. + +- webrtcbin will now correctly parse a TURN URI that contains a + username or password with a : in it. + +- The GStreamer WebRTC library gained a GstWebRTCDataChannel object + roughly matching the interface exposed by the WebRTC specification + to allow for easier binding generation and use of data channels. OpenGL integration -- FIXME +GStreamer OpenGL bindings/build related changes + +- The GStreamer OpenGL library (libgstgl) now ships pkg-config files + for platform-specific API where libgstgl provides a public + integration interface and a pkg-config file for a dependency on the + detected OpenGL headers. The new list of pkg-config files in + addition to the original gstreamer-gl-1.0 are gstreamer-gl-x11-1.0, + gstreamer-gl-wayland-1.0, gstreamer-gl-egl-1.0, and + gstreamer-gl-prototypes-1.0 (for OpenGL headers when including + gst/gl/gstglfuncs.h). + +- GStreamer OpenGL now ships some platform-specific introspection data + for platforms that have a public interface. This should allow for + easier integration with bindings involving platform specific + functionality. The new introspection data files are named + GstGLX11-1.0, GstGLWayland-1.0, and GstGLEGL-1.0. + +GStreamer OpenGL Features + +- The iOS implementation no longer accesses UIKit objects off the main + thread fixing a loud warning message when used in iOS applications. + +- Support for mouse and keyboard handling using the GstNavigation + interface was added for the wayland implementation complementing the + already existing support for the X11 and Windows implementations. + +- A new helper base class for source elements, GstGLBaseSrc is + provided to ease writing source elements producing OpenGL video + frames. + +- Support for some more 12-bit and 16-bit video formats (Y412_LE, + Y412_BE, Y212_LE, Y212_BE, P012_LE, P012_BE, P016, NV16, NV61) was + added to glcolorconvert. + +- glupload can now import dma-buf’s into external-oes textures. + +- A new display type for EGLDevice-based systems was added. It is + currently opt-in by using either the GST_GL_PLATFORM=egl-device + environment variable or manual construction + (gst_gl_display_egl_device_new*()) due to compatibility issues with + some platforms. + +- Support was added for WinRT/UWP using the ANGLE project for running + OpenGL-based pipelines within a UWP application. + +- Various elements now support changing the GstGLDisplay to be used at + runtime in simple cases. This is primarily helpful for changing or + adding an OpenGL-based video sink that must share an OpenGL context + with an external source to an already running pipeline. + +GStreamer Vulkan integration + +- There is now a GStreamer Vulkan library to provide integration + points and helpers with applications and external GStreamer Vulkan + based elements. The structure of the library is modelled similarly + to the already existing GStreamer OpenGL library. Please note that + the API is still unstable and may change in future releases, + particularly around memory handling. The GStreamer Vulkan library + contains objects for sharing the vkInstance, vkDevice, vkQueue, + vkImage, VkMemory, etc with other elements and/or the application as + well as some helper objects for using Vulkan in an application or + element. + +- Added support for building and running on/for the Android and + Windows systems to complement the existing XCB, Wayland, MacOS, and + iOS implementations. + +- XCB gained support for mouse/keyboard events using the GstNavigation + API. + +- New vulkancolorconvert element for converting between color formats. + vulkancolorconvert can currently convert to/from all 8-bit RGBA + formats as well as 8-bit RGBA formats to/from the YUV formats AYUV, + NV12, and YUY2. + +- New vulkanviewconvert element for converting between stereo view + layouts. vulkanviewconvert can currently convert between all of the + single memory formats (side-by-side, top-bottom, column-interleaved, + row-interleaved, checkerboard, left, right, mono). + +- New vulkanimageidentity element for a blit from the input vulkan + image/s to a new vulkan image/s. + +- The vulkansink element can now scale the input image to the output + window/surface size where that information is available. + +- The vulkanupload element can now configure a transfer from system + memory to VulkanImage-based memory. Previously, this required two + vulkanupload elements. Tracing framework and debugging improvements -- FIXME +- gst_tracing_get_active_tracers() returns a list of active tracer + objects. This can be used to interact with tracers at runtime using + GObject API such as action signals. This has been implemented in the + leaks tracer for snapshotting and retrieving leaked/active objects + at runtime. + +- The leaks tracer can now be interacted with programmatically at + runtime via GObject action signals: + + - get-live-object returns a list of live (allocated) traced + objects + - log-live-objects logs a list of live objects into the debug log. + This is the same as sending the SIGUSR1 signal on unix systems, + but works on all operating systems including Windows. + - activity-start-tracking, activity-get-checkpoint, + activity-log-checkpoint, activity-stop-tracking: add support for + tracking and checkpointing objects, similar to what was + previously available via SIGUSR2 on unix systems, but works on + all operating systems including Windows. + +- various GStreamer gdb debug helper improvements: + + - new ‘gst-pipeline-tree’ command + - more gdb helper functions: gst_element_pad(), gst_pipeline() and + gst_bin_get() + - support for queries and buffers + - print more info for segment events, print event seqnums, object + pointers and structures + - improve gst-print command to show more pad and element + information Tools -- FIXME +gst-launch-1.0 + +- now prints the pipeline position and duration if available when the + pipeline is advancing. This is hopefully more user-friendly and + gives visual feedback on the terminal that the pipeline is actually + up and running. This can be disabled with the --no-position command + line option. + +- the parse-launch pipeline syntax now has support for presets: + use@preset=<preset-name>" after an element to load a preset. + +gst-inspect-1.0 + +- new --color command line option to force coloured output even if not + connected to a tty + +gst-tester-1.0 (new) + +- gst-tester-1.0 is a new tool for plugin developers to launch + .validatetest files with TAP compatible output, meaning it can + easily and cleanly be integrated with the meson test harness. It + allows you to use gst-validate (from the gst-devtools module) to + write integration tests in any GStreamer repository whilst keeping + the tests as close as possible to the code. The tool transparently + handles gst-validate being installed or not: if it is not installed + those integration tests will simply be skipped. + +gst-play-1.0 + +- interactive keyboard controls now also work on Windows + +gst-transcoder-1.0 (new) + +- gst-transcoder-1.0 is a new command line tool to transcode one URI + into another URI based on the specified encoding profile using the + new GstTranscoder API (see above). GStreamer RTSP server -- FIXME +- Fix issue where the first few packets (i.e. keyframes) could + sometimes be dropped if the rtsp media pipeline had a live input. + This was a regression from GStreamer 1.14. There are more fixes + pending for that which will hopefully land in 1.18.1. + +- Fix backpressure handling when sending data in TCP interleave mode + where RTSP requests and responses and RTP/RTCP packets flow over the + same RTSP TCP connection: The previous implementation would at some + point stop sending data to other clients when a single client + stopped consuming data or did not consume data fast enough. This + obviously created problems for shared media, where the same stream + from a single producer pipeline is sent to multiple clients. Instead + we now manage a backlog in the server’s stream-transport component + and remove slow clients once this backlog exceeds a maximum duration + (which is currently hardcoded). + +- Onvif Streaming Specification trick modes support (see section at + the beginning) + +- Scale/Speed header support: Speed will deliver the data at the + requested speed, which means increasing the data bandwidth for + speeds > 1.0. Scale will attempt to do the same without affecting + the overall bandwidth requirement vis-a-vis normal playback speed + (e.g. it might drop data for fast-forward playback). + +- rtspclientsink: send buffer lists in one go for better performance GStreamer VAAPI -- FIXME +- A lot of work was done adding support for media-driver (iHD), the + new VAAPI driver for Intel, mostly for Gen9 onwards. + +- Available color formats and frame sizes are now detected at run-time + according to the context configuration. + +- Gallium drivers have been re-enabled in the allowed drivers list + +- Improved the mapping between VA formats and GStreamer formats by + generating a mapping table at run-time since even among different + drivers the mapping might be different, particularly for RGB with + little endianness. + +- The experimental Flexible Encoding Infrastructure (FEI) elements + have been removed since they were not really actively maintained or + tested. + +- Enhanced the juggling of DMABuf buffers and VASurface metas + +- New vaapioverlay element: a compositor element using VA VPP blend + capabilities to accelerate overlaying and compositing. Example + pipeline: + + gst-launch-1.0 -vf videotestsrc ! vaapipostproc ! tee name=testsrc ! queue \ + ! vaapioverlay sink_1::xpos=300 sink_1::alpha=0.75 name=overlay ! vaapisink \ + testsrc. ! queue ! overlay. + +vaapipostproc + +- added video-orientation support, supporting frame mirroring and + rotation + +- added cropping support, either via properties (crop-left, + crop-right, crop-bottom and crop-top) or buffer meta. + +- new skin-tone-enhancenment-level property which is the iHD + replacement of the i965 driver’s sink-tone-level. Both are + incompatible with each other, so both were kept. + +- handle video colorimetry + +- support HDR10 tone mapping + +vaapisink + +- resurrected wayland backend for non-weston compositors by extracting + the DMABuf from the VASurface and rendering it. + +- merged the video overlay API for wayland. Now applications can + define the “window” to render on. + +- demoted the vaapisink element to secondary rank since libva + considers rendering as a second-class feature. + +VAAPI Encoders + +- new common target-percentage property which is the desired target + percentage of bitrate for variable rate control. + +- encoders now extract their caps from the driver at registration + time. + +- vaapivp9enc: added support for low power mode and support for + profile 2 (profile 0 by default) + +- vaapih264enc: new max-qp property that sets the maximum quantization + value. Support for ICQ and QBVR bitrate control mode, adding a + quality-factor property for these modes. Support baseline profile as + constrained-baseline + +- vaapih265enc: + + - support for main-444 and main-12 encoding profiles. + - new max-qp property that sets the maximum quantization value. + - support for ICQ and QBVR bitrate control mode, adding a + quality-factor property for these modes. + - handle SCC profiles. + - num-tile-cols and num-tile-row properties to specify the number + of tiles to use. + - the low-delay-b property was deprecated and is now determined + automatically. + - improved profile selection through caps. + +VAAPI Decoders + +- Decoder surfaces are not bound to their context any longer and can + thus be created and used dynamically, removing the deadlock + headache. + +- Reverse playback is now fluid + +- Forward Region-of-Interest (ROI) metas downstream + +- GLTextureUploadMeta uses DMABuf when GEM is not available. Now + Gallium drivers can use this meta for rendering with EGL. + +- vaapivp9dec: support for 4:2:2 and 4:4:4 chroma type streams + +- vaapih265dec: skip all pictures prior to the first I-frame. Enable + passing range extension flags to the driver. Handle SCC profiles. + +- vaapijpegdec: support for 4:0:0, 4:1:1, 4:2:2 and 4:4:4 chroma types + pictures + +- vaapih264dec: handle baseline streams as constrained-baseline if + possible and make it more tolerant when encountering unknown NALs GStreamer OMX -- FIXME +- omxvideoenc: use new video encoder subframe API to push out slices + as soon as they’re ready + +- omxh264enc, omxh265enc: negotiate subframe mode via caps. To enable + it, force downstream caps to video/x-h264,alignment=nal or + video/x-h265,alignment=nal. + +- omxh264enc: Add ref-frames property + +- Zynq ultrascale+ specific video encoder/decoder improvements: + + - GRAY8 format support + - support for alternate fields interlacing mode + - video encoder: look-ahead, long-term-ref, and long-term-freq + properties GStreamer Editing Services and NLE -- FIXME +- Added nested timelines and subproject support so that GES projects + can be used as clips, potentially serializing nested projects in the + main file or referencing external project files. + +- Implemented an OpenTimelineIO GES formatter. This means GES and + GStreamer can now load and save projects in all the formats + supported by otio. + +- Implemented a GESMarkerList object which allow setting timed + metadata on any GES object. + +- Fixed audio rendering issues during clip transition by ensuring that + a single segment is pushed into encoders. + +- The GESUriClipAsset API is now MT safe. + +- Added ges_meta_container_register_static_meta() to allow fixing a + type for a specific metadata without actually setting a value. + +- The framepositioner element now handles resizing the project and + keeps the same positioning when the aspect ratio is not changed . + +- Reworked the documentation, making it more comprehensive and much + more detailed. + +- Added APIs to retrieve natural size and framerate of a clip (for + example in the case of URIClip it is the framerate/size of the + underlying file). + +- ges_container_edit() is now deprecated and GESTimelineElement gained + the ges_timeline_element_edit() method so the editing API is now + usable from any element in the timeline. + +- GESProject::loading was added so applications can be notified about + when a new timeline starts loading. + +- Implemented the GstStream API in GESTimeline. + +- Added a way to add a timeoverlay inside the test source (potentially + with timecodes). + +- Added APIs to convert times to frame numbers and vice versa: + + - ges_timeline_get_frame_time() + + - ges_timeline_get_frame_at() + + - ges_clip_asset_get_frame_time() + + - ges_clip_get_timeline_time_from_source_frame() + + Quite a few validate tests have been implemented to check the + behavior for various demuxer/codec formats + +- Added ges_layer_set_active_for_tracks() which allows muting layers + for the specified tracks + +- Deprecated GESImageSource and GESMultiFileSource now that we have + imagesequencesrc which handles the imagesequence “protocol” + +- Stopped exposing ‘deinterlacing’ children properties for clip types + where they do not make sense. + +- Added support for simple time remapping effects GStreamer validate -- FIXME +- Introduced the concept of “Test files” allowing to implement “all + included” test cases, meaning that inside the file the following can + be defined: + + - The application arguments + - The validate configurations + - The validate scenario + + This replaces the previous big dictionary file in + gst-validate-launcher to implement specific test cases. + + We set several variables inside the files (as well as inside + scenarios and config files) to make them relocatable. + + The file format has been enhanced so it is easier to read and write, + for example line ending with a coma or (curly) brackets can now be + used as continuation marker so you do not need to add \ at the end + of lines to write a structure on several lines. + +- Support the imagesequence “protocol” and added integration tests for + it. + +- Added action types to allow the scenario to run the Test Clock for + better reproducibility of tests. + +- Support generating tests to check that seeking is frame accurate + (base on ssim). + +- Added ways to record buffers checksum (in different ways) in the + validateflow module. + +- Added vp9 encoding tests. + +- Enhanced seeking action types implementation to allow support for + segment seeks. + +- Output improvements: + + - Logs are now in markdown formats (and bat is used to dump them + if available). + - File format issues in scenarios/configs/tests files are nicely + reported with the line numbers now. GStreamer Python Bindings -- FIXME +- Python 2.x is no longer supported -GStreamer C# Bindings +- Support mapping buffers without any memcpy: + + - Added a ContextManager to make the API more pythonic -- FIXME + with buf.map(Gst.MapFlags.READ | Gst.MapFlags.WRITE) as info: + info.data[42] = 0 -GStreamer Rust Bindings +- Added high-level helper API for constructing pipelines: -- FIXME + - Gst.Bin.make_and_add(factory_name, instance_name=None) + - Gst.Element.link_many(element, ...) -GStreamer Rust Plugins +GStreamer C# Bindings -- FIXME +- Bind gst_buffer_new_wrapped() manually to fix memory handling. + +- Fix gst_promise_new_with_change_func() where bindgen didn’t properly + detect the func as a closure. + +- Declare GstVideoOverlayComposition and GstVideoOverlayRectangle as + opaque type and subclasses of Gst.MiniObject. This changes the API + but without this all usage will cause memory corruption or simply + not work. + +- on Windows, look for gstreamer, glib and gobject DLLs using the MSVC + naming convention (i.e. gstvideo-1.0-0.dll instead of + libgstvideo-1.0-0.dll). + + The names of these DLLs have to be hardcoded in the bindings, and + most C# users will probably be using the Microsoft toolchain anyway. + + This means that the MSVC compiler is now required to build the + bindings, MingW will no longer work out of the box. + +GStreamer Rust Bindings and Rust Plugins + +The GStreamer Rust bindings are released separately with a different +release cadence that’s tied to gtk-rs, but the latest release has +already been updated for the new GStreamer 1.18 API, so there’s +absolutely no excuse why your next GStreamer application can’t be +written in Rust anymore. + +gst-plugins-rs, the module containing GStreamer plugins written in Rust, +has also seen lots of activity with many new elements and plugins. + +What follows is a list of elements and plugins available in +gst-plugins-rs, so people don’t miss out on all those potentially useful +elements that have no C equivalent. + +Rust audio plugins + +- audiornnoise: New element for audio denoising which implements the + noise removal algorithm of the Xiph RNNoise library, in Rust +- rsaudioecho: Port of the audioecho element from gst-plugins-good + rsaudioloudnorm: Live audio loudness normalization element based on + the FFmpeg af_loudnorm filter +- claxondec: FLAC lossless audio codec decoder element based on the + pure-Rust claxon implementation +- csoundfilter: Audio filter that can use any filter defined via the + Csound audio programming language +- lewtondec: Vorbis audio decoder element based on the pure-Rust + lewton implementation + +Rust video plugins + +- cdgdec/cdgparse: Decoder and parser for the CD+G video codec based + on a pure-Rust CD+G implementation, used for example by karaoke CDs +- cea608overlay: CEA-608 Closed Captions overlay element +- cea608tott: CEA-608 Closed Captions to timed-text (e.g. VTT or SRT + subtitles) converter +- tttocea608: CEA-608 Closed Captions from timed-text converter +- mccenc/mccparse: MacCaption Closed Caption format encoder and parser +- sccenc/sccparse: Scenarist Closed Caption format encoder and parser +- dav1dec: AV1 video decoder based on the dav1d decoder implementation + by the VLC project +- rav1enc: AV1 video encoder based on the fast and pure-Rust rav1e + encoder implementation +- rsflvdemux: Alternative to the flvdemux FLV demuxer element from + gst-plugins-good, not feature-equivalent yet +- rsgifenc/rspngenc: GIF/PNG encoder elements based on the pure-Rust + implementations by the image-rs project + +Rust text plugins + +- textwrap: Element for line-wrapping timed text (e.g. subtitles) for + better screen-fitting, including hyphenation support for some + languages + +Rust network plugins + +- reqwesthttpsrc: HTTP(S) source element based on the Rust + reqwest/hyper HTTP implementations and almost feature-equivalent + with the main GStreamer HTTP source souphttpsrc +- s3src/s3sink: Source/sink element for the Amazon S3 cloud storage +- awstranscriber: Live audio to timed text transcription element using + the Amazon AWS Transcribe API + +Generic Rust plugins + +- sodiumencrypter/sodiumdecrypter: Encryption/decryption element based + on libsodium/NaCl +- togglerecord: Recording element that allows to pause/resume + recordings easily and considers keyframe boundaries +- fallbackswitch/fallbacksrc: Elements for handling potentially + failing (network) sources, restarting them on errors/timeout and + showing a fallback stream instead +- threadshare: Set of elements that provide alternatives for various + existing GStreamer elements but allow to share the streaming threads + between each other to reduce the number of threads +- rsfilesrc/rsfilesink: File source/sink elements as replacements for + the existing filesrc/filesink elements Build and Dependencies @@ -135,11 +1730,67 @@ Build and Dependencies - API and plugin documentation are no longer built with gtk_doc. The gtk_doc documentation has been removed in favour of a new unified - documentation module built with hotdoc. The intention is to - distribute the generated documentation in form of tarballs alongside - releases. - -- FIXME + documentation module built with hotdoc (also see “Documentation + improvements” section below). Distributors should use the + documentation release tarball instead of trying to package hotdoc + and building the documentation from scratch. + +- gst-plugins-bad now includes an internal copy of libusrsctp, as + there are problems in usrsctp with global shared state, lack of API + stability guarantees, and the absence of any kind of release + process. We also can’t rely on distros shipping a version with the + fixes we need. Both firefox and Chrome bundle their own copies too. + It is still possible to build against an external copy of usrsctp if + so desired. + +- nvcodec no longer needs the NVIDIA NVDEC/NVENC SDKs available at + build time, only at runtime. This allows distributions to ship this + plugin by default and it will just start to work when the required + run-time SDK libraries are installed by the user, without users + needing to build and install the plugin from source. + +- the gst-editing-services tarball is now named gst-editing-services + for consistency (used to be gstreamer-editing-services). + +- the gst-validate tarball has been superseded by the gst-devtools + tarball for consistency with the git module name. + +gst-build + +gst-build is a meta-module and serves primarily as our uninstalled +development environment. It makes it easy to build most of GStreamer, +but unlike Cerbero it only comes with a limited number of external +dependencies that can be built as subprojects if they are not found on +the system. + +gst-build is based on Meson and replaces the old autotools +gst-uninstalled script. + +- The ‘uninstalled’ target has been renamed to ‘devenv’ + +- Experimental gstreamer-full library containing all built plugins and + their deps when building with -Ddefault_library=static. A monolithic + library is easier to distribute, and may be required in some + environments. GStreamer core, GLib and GObject are always included, + but external dependencies are still dynamically linked. The + gst-full-libraries meson option allows adding other GStreamer + libraries to the gstreamer-full build. This is an experiment for now + and its behaviour or API may still change in future releases. + +- Add glib-networking as a subproject when glib is a subproject and + load gio modules in the devenv, tls option control whether to use + openssl or gnutls. + +- git-worktree: Allow multiple worktrees for subproject branches + +- Guard against meson being run from inside the uninstalled devenv, as + this might have unexpected consequences. + +- our ffmpeg and x264 meson ports have been updated to the latest + stable version (you might need to update the subprojects checkout + manually though, or just remove the checkouts so meson checks out + the latest version again; improvements for this are pending in + meson, but not merged yet). Cerbero @@ -147,29 +1798,373 @@ Cerbero is a meta build system used to build GStreamer plus dependencies on platforms where dependencies are not readily available, such as Windows, Android, iOS and macOS. -Cerbero has seen a number of improvements: +General improvements + +- Recipe build steps are done in parallel wherever possible. This + leads to massive improvements in overall build time. +- Several recipes were ported to Meson, which improved build times +- Moved from using both GnuTLS and OpenSSL to only OpenSSL +- Moved from yasm to nasm for all assembly compilation +- Support zsh when running the cerbero shell command +- Numerous version upgrades for dependencies +- Default to xz for tarball binary packages. bz2 can be selected with + the --compress-method option to package. +- Added boolean variant for controlling the optimization level: + -v optimization +- Ship .pc pkgconfig files for all plugins in the binary packages +- CMake and nasm will only be built by Cerbero if the system versions + are unusable +- The nvcodec variant was removed and the nvcodec plugin is built by + default now (as it no longer requires the SDK to be installed at + build time, only at runtime) + +macOS / iOS + +- Minimum iOS SDK version bumped to 11.0 +- Minimum macOS SDK version bumped to 10.11 +- No longer need to manually add support for newer iOS SDK versions +- Added Vulkan elements via MoltenVK +- Build times were improved by code-signing all build tools +- macOS framework ships all gstreamer libraries instead of an outdated + subset +- Ship pkg-config in the macOS framework package +- fontconfig: Fix EXC_BAD_ACCESS crash on iOS ARM64 +- Improved App Store compatibility by setting LC_VERSION_MIN_MACOSX, + fixing relocations, and improved bitcode support + +Windows + +- MinGW-GCC toolchain was updated to 8.2. It uses the Universal CRT + instead of MSVCRT which eliminates cross-CRT issues in the Visual + Studio build. +- Require Windows 7 or newer for running binaries produced by Cerbero +- Require Windows x86_64 for running Cerbero to build binary packages +- Cerbero no longer uses C:/gstreamer/1.0 as a prefix when building. + That prefix is reserved for use by the MSI installers. +- Several recipes can now be buit with Visual Studio instead of MinGW. + Ported to meson: opus, libsrtp, harfbuzz, cairo, openh264, libsoup, + libusrsctp. Existing build system: libvpx, openssl. +- Support building using Visual Studio for 32-bit x86. Previously we + only supported building for 32-bit x86 using the MinGW toolchain. +- Fixed annoying msgmerge popups in the middle of cerbero builds +- Added configuration options vs_install_path and vs_install_version + for specifying custom search locations for older Visual Studio + versions that do not support vswhere. You can set these in + ~/.cerbero/cerbero.cbc where ~ is the MSYS homedir, not your Windows + homedir. +- New Windows-specific plugins: d3d11, mediafoundation, wasapi2 +- Numerous compatibility and reliability fixes when running Cerbero on + Windows, especially non-English locales +- proxy-libintl now exports the same symbols as gettext, which makes + it a drop-in replacement +- New mapping variant for selecting the Visual Studio CRT to use: + -v vscrt=<value>. Valid values are md, mdd, and auto (default). A + separate prefix is used when building with either md (release) or + mdd (debug), and the outputted package will have +debug in the + filename. This variant is also used for selecting the correct Qt + libraries (debug vs release) to use when building with -v qt5 on + Windows. +- Support cross-compile on Windows to Windows ARM64 and ARMv7 +- Support cross-compile on Windows to the Universal Windows Platform + (UWP). Only the subset of plugins that can be built entirely with + Visual Studio will be selected in this case. To do so, use the + config/cross-uwp-universal.cbc configuration, which will build + ARM64, x86, and x86_64 binaries linked to the release CRT, with + optimizations enabled, and debugging turned on. You can combine this + with -v vscrt=mdd to produce binaries linked to the debug CRT. You + can turn off optimizations with the -v nooptimization variant. + +Windows MSI installer + +- Require Windows 7 or newer for running GStreamer +- Fixed some issues with shipping of pkg-config in the Windows + installers +- Plugin PDB debug files are now shipped in the development package, + not the runtime package +- Ship installers for 32-bit binaries built with Visual Studio +- Ship debug and release “universal” (ARM64, X86, and X86_64) tarballs + built for the Universal Windows Platform +- Windows MSI installers now install into separate prefixes when + building with MSVC and MinGW. Previously both would be installed + into C:/gstreamer/1.0/x86 or C:/gstreamer/1.0/x86_64. Now, the + installation prefixes are: + + ---------------------------------------------------------------------------------------------------------------- + Target Path Build options + --------------------------- ------------------------------------ ----------------------------------------------- + MinGW 32-bit C:/gstreamer/1.0/mingw_x86 -c config/win32.cbc + + MinGW 64-bit C:/gstreamer/1.0/mingw_x86_64 -c config/win64.cbc + + MSVC 32-bit C:/gstreamer/1.0/msvc_x86 -c config/win32.cbc -v visualstudio + + MSVC 64-bit C:/gstreamer/1.0/msvc_x86_64 -c config/win64.cbc -v visualstudio + + MSVC 32-bit (debug) C:/gstreamer/1.0/msvc-debug_x86 -c config/win32.cbc -v visualstudio,vscrt=mdd + + MSVC 64-bit (debug) C:/gstreamer/1.0/msvc-debug_x86_64 -c config/win64.cbc -v visualstudio,vscrt=mdd + ---------------------------------------------------------------------------------------------------------------- + +Note: UWP binary packages are tarballs, not MSI installers. + +Linux + +- Support creating MSI installers using WiX when cross-compiling to + Windows +- Support running cross-windows binaries with Wine when using the + shell and runit cerbero commands +- Added bash-completion support inside the cerbero shell on Linux +- Require a system-wide installation of openssl on Linux +- Added variant -v vaapi to build gstreamer-vaapi and the new gstva + plugin +- Debian packaging was disabled because it does not work. Help in + fixing this is appreciated. +- Trimmed the list of packages needed for bootstrap on Linux + +Android -- FIXME +- Updated to NDK r21 +- Support Vulkan +- Support Qt 5.14+ binary package layout Platform-specific changes and improvements Android -- FIXME +- opensles: Remove hard-coded buffer-/latency-time values and allow + openslessink to handle 48kHz streams. + +- photography interface and camera source: Add additional settings + relevant to Android such as: Exposure mode property, extra colour + tone values (aqua, emboss, sketch, neon), extra scene modes + (backlight, flowers, AR, HDR), and missing virtual methods for + exposure mode, analog gain, lens focus, colour temperature, min & + max exposure time. Add new effects and scene modes to Camera + parameters. macOS and iOS -- FIXME +- vtdec can now output to Vulkan-backed memory for zerocopy support + with the Vulkan elements. Windows -- toolchain upgrade +- d3d11videosink: new Direct3D11-based video sink with support for + HDR10 rendering if supported. + +- Hardware-accelerated video decoding on Windows via DXVA2 / + Direct3D11 using native Windows APIs rather than per-vendor SDKs + (like MSDK for Intel or NVCODEC for NVidia). Plus modern Direct3D11 + integration rather than the almost 20-year old Direct3D9 from + Windows XP times used in d3dvideosink. Formats supported for + decoding are H.264, H.265, VP8, and VP9, and zero-copy operation + should be supported in combination with the new d3d11videosink. See + Seungha’s blog post “Windows DXVA2 (via Direct3D 11) Support in + GStreamer 1.17” for more details. + +- Microsoft Media Foundation plugin for hardware-accelerated video + encoding on Windows using native Windows APIs rather than per-vendor + SDKs. Formats supported for encoding are H.264, H.265 and VP9. Also + includes audio encoders for AAC and MP3. See Seungha’s blog post + “Bringing Microsoft Media Foundation to GStreamer” for some more + details about this. + +- new mfvideosrc video capture source element using the latest Windows + APIs rather than ancient APIs used by ksvideosrc/winks. ksvideosrc + should be considered deprecated going forward. + +- d3d11: add d3d11convert, a color space conversion and rescaling + element using shaders, and introduce d3d11upload and d3d11download + elements that work just like glupload and gldownload but for D3D11. + +- Universal Windows Platform (UWP) support, including official + GStreamer binary packages for it. Check out Nirbheek’s latest blog + post “GStreamer 1.18 supports the Universal Windows Platform” for + more details. + +- systemclock correctness and reliability fixes, and also don’t start + the system clock at 0 any longer (which shouldn’t make any + difference to anyone, as absolute clock time values are supposed to + be meaningless in themselves, only the rate of increase matters). + +- toolchain specific plugin registry: the registry cache is now named + differently for MSVC and MinGW toolchains/packages, which should + avoid problems when switching between binaries built with a + different toolchain. + +- new wasapi2 plugin mainly to support UWP applications. The core + logic of this plugin is almost identical to existing wasapi plugin, + but the main target is Windows 10 and UWP. This plugin uses WinRT + APIs, so will likely not work on Windows 8 or older. Unlike the + existing wasapi plugin, this plugin supports automatic stream + routing (auto fallback when device was removed) and device level + mute/volume control. Exclusive streaming mode is not supported, + however, and loopback features are not implemented yet. It is also + only possible to build this plugin with MSVC and the Windows 10 SDK, + it can’t be cross-compiled with the MingW toolchain. + +- new dxgiscreencapsrc element which uses the Desktop Duplication API + to capture the desktop screen at high speed. This is only supported + on Windows 8 or later. Compared to the existing elements + dxgiscreencapsrc offers much better performance, works in High DPI + environments and draws an accurate mouse cursor. + +- d3dvideosink was downgraded to secondary rank, d3d11videosink is + preferred now. Support OverlayComposition for GPU overlay + compositing of subtitles and logos. + +- debug log output fixes, esp. with a non-UTF8 locale/codepage + +- speex, jack: fixed crashes on Windows caused by cross-CRT issues + +- gst-play-1.0 interactive keyboard controls now also work on Windows + +Linux + +- kmssink: Add support for P010 and P016 formats + +- vah264dec: new experimental va plugin with an element for H.264 + decoding with VA-API. This novel approach, different from + gstreamer-vaapi, uses the gstcodecs library for decoder state + handling, which it is hoped will make for cleaner code because it + uses VA-API without further layers or wrappers. Check out Víctor’s + blog post “New VA-API H.264 decoder in gst-plugins-bad” for the full + lowdown and the limitations of this new plugin, and how to give it a + spin. + +- v4l2codecs: introduce a V4L2 CODECs Accelerator. This plugin will + support the new CODECs uAPI in the Linux kernel, which consists of + an accelerator interface similar to DXVA, NVDEC, VDPAU and VAAPI. So + far H.264 and VP8 are supported. This is used on certain embedded + systems such as i.mx8m, rk3288, rk3399, Allwinner H-series SoCs. + +Documentation improvements + +- unified documentation containing tutorials, API docs, plugin docs, + etc. all under one roof, shipped in form of a documentation release + tarball containing both devhelp and html documentation. + +- all documentation is now generated using hotdoc, gtk-doc is no + longer used. Distributors should use the above-mentioned + documentation release tarball instead of trying to package hotdoc + and building the documentation from scratch. + +- there is now documentation for wrapper plugins like gst-libav and + frei0r, as well as tracer plugins. + +- for more info, check out Thibault’s “GStreamer Documentation” + lightning talk from the 2019 GStreamer Conference. + +- new API for plugins to support the documentation system: + + - new GParamSpecFlag GST_PARAM_DOC_SHOW_DEFAULT to make + gst-inspect-1.0 (and the documentation) show the paramspec’s + default value rather than the actually set value as default + - GstPadTemplate getter and setter for “documentation caps”, + gst_pad_template_set_documentation_caps() and + gst_pad_template_get_documentation_caps(): This can be used in + elements where the caps of pad templates are dynamically + generated and/or dependent on the environment, to override the + caps shown in the documentation (usually to advertise the full + set of possible caps). + - gst_type_mark_as_plugin_api() for marking types as plugin API, + used for plugin-internal types like enums, flags, pad + subclasses, boxed types, and such. + +Possibly Breaking Changes + +- GstVideo: the canonical list of raw video formats (for use in caps) + has been reordered, so video elements such as videotestsrc or + videoconvert might negotiate to a different format now than before. + The new format might be a higher-quality format or require more + processing overhead, which might affect pipeline performance. + +- mpegtsdemux used to wrongly advertise H.264 and H.265 video + elementary streams as alignment=nal. This has now been fixed and + changed to alignment=none, which means an h264parse or h265parse + element is now required after tsdemux for some pipelines where there + wasn’t one before, e.g. in transmuxing scenarios (tsdemux ! tsmux). + Pipelines without such a parser may now fail to link or error out at + runtime. As parsers after demuxers and before muxers have been + generally required for a long time now it is hoped that this will + only affect a small number of applications or pipelines. + +- The Android opensles audio source and sink used to have hard-coded + buffer-/latency-time values of 20ms. This is no longer needed with + newer Android versions and has now been removed. This means a higher + or lower value might now be negotiated by default, which can affect + pipeline performance and latency. + +Known Issues -- FIXME +- None in particular Contributors -- FIXME +Aaron Boxer, Adam Duskett, Adam x Nilsson, Adrian Negreanu, Akinobu +Mita, Alban Browaeys, Alcaro, Alexander Lapajne, Alexandru Băluț, Alex +Ashley, Alex Hoenig, Alicia Boya García, Alistair Buxton, Ali Yousuf, +Ambareesh “Amby” Balaji, Amr Mahdi, Andoni Morales Alastruey, Andreas +Frisch, Andre Guedes, Andrew Branson, Andrey Sazonov, Antonio Ospite, +aogun, Arun Raghavan, Askar Safin, AsociTon, A. Wilcox, Axel Mårtensson, +Ayush Mittal, Bastian Bouchardon, Benjamin Otte, Bilal Elmoussaoui, +Brady J. Garvin, Branko Subasic, Camilo Celis Guzman, Carlos Rafael +Giani, Charlie Turner, Cheng-Chang Wu, Chris Ayoup, Chris Lord, +Christoph Reiter, cketti, Damian Hobson-Garcia, Daniel Klamt, Daniel +Molkentin, Danny Smith, David Bender, David Gunzinger, David Ing, David +Svensson Fors, David Trussel, Debarshi Ray, Derek Lesho, Devarsh +Thakkar, dhilshad, Dimitrios Katsaros, Dmitriy Purgin, Dmitry Shusharin, +Dominique Leuenberger, Dong Il Park, Doug Nazar, dudengke, Dylan McCall, +Dylan Yip, Ederson de Souza, Edward Hervey, Eero Nurkkala, Eike Hein, +ekwange, Eric Marks, Fabian Greffrath, Fabian Orccon, Fabio D’Urso, +Fabrice Bellet, Fabrice Fontaine, Fanchao L, Felix Yan, Fernando +Herrrera, Francisco Javier Velázquez-García, Freyr, Fuwei Tang, Gaurav +Kalra, George Kiagiadakis, Georgii Staroselskii, Georg Lippitsch, Georg +Ottinger, gla, Göran Jönsson, Gordon Hart, Gregor Boirie, Guillaume +Desmottes, Guillermo Rodríguez, Haakon Sporsheim, Haihao Xiang, Haihua +Hu, Havard Graff, Håvard Graff, Heinrich Kruger, He Junyan, Henry +Wilkes, Hosang Lee, Hou Qi, Hu Qian, Hyunjun Ko, ibauer, Ignacio Casal +Quinteiro, Ilya Smelykh, Jake Barnes, Jakub Adam, James Cowgill, James +Westman, Jan Alexander Steffens, Jan Schmidt, Jan Tojnar, Javier Celaya, +Jeffy Chen, Jennifer Berringer, Jens Göpfert, Jérôme Laheurte, Jim +Mason, Jimmy Ohn, J. Kim, Joakim Johansson, Jochen Henneberg, Johan +Bjäreholt, Johan Sternerup, John Bassett, Jonas Holmberg, Jonas Larsson, +Jonathan Matthew, Jordan Petridis, Jose Antonio Santos Cadenas, Josep +Torra, Jose Quaresma, Josh Matthews, Joshua M. Doe, Juan Navarro, +Juergen Werner, Julian Bouzas, Julien Isorce, Jun-ichi OKADA, Justin +Chadwell, Justin Kim, Keri Henare, Kevin JOLY, Kevin King, Kevin Song, +Knut Andre Tidemann, Kristofer Björkström, krivoguzovVlad, Kyrylo +Polezhaiev, Lenny Jorissen, Linus Svensson, Loïc Le Page, Loïc Minier, +Lucas Stach, Ludvig Rappe, Luka Blaskovic, luke.lin, Luke Yelavich, +Marcin Kolny, Marc Leeman, Marco Felsch, Marcos Kintschner, Marek +Olejnik, Mark Nauwelaerts, Markus Ebner, Martin Liska, Martin Theriault, +Mart Raudsepp, Matej Knopp, Mathieu Duponchelle, Mats Lindestam, Matthew +Read, Matthew Waters, Matus Gajdos, Maxim Paymushkin, Maxim P. +Dementiev, Michael Bunk, Michael Gruner, Michael Olbrich, Miguel París +Díaz, Mikhail Fludkov, Milian Wolff, Millan Castro, Muhammet Ilendemli, +Nacho García, Nayana Topolsky, Nian Yan, Nicola Murino, Nicolas +Dufresne, Nicolas Pernas Maradei, Niels De Graef, Nikita Bobkov, Niklas +Hambüchen, Nirbheek Chauhan, Ognyan Tonchev, okuoku, Oleksandr +Kvl,Olivier Crête, Ondřej Hruška, Pablo Marcos Oltra, Patricia Muscalu, +Peter Seiderer, Peter Workman, Philippe Normand, Philippe Renon, Philipp +Zabel, Pieter Willem Jordaan, Piotr Drąg, Ralf Sippl, Randy Li, Rasmus +Thomsen, Ratchanan Srirattanamet, Raul Tambre, Ray Tiley, Richard +Kreckel, Rico Tzschichholz, R Kh, Robert Rosengren, Robert Tiemann, +Roman Shpuntov, Roman Sivriver, Ruben Gonzalez, Rubén Gonzalez, +rubenrua, Ryan Huang, Sam Gigliotti, Santiago Carot-Nemesio, Saunier +Thibault, Scott Kanowitz, Sebastian Dröge, Sebastiano Barrera, Seppo +Yli-Olli, Sergey Nazaryev, Seungha Yang, Shinya Saito, Silvio +Lazzeretti, Simon Arnling Bååth, Siwon Kang, sohwan.park, Song Bing, +Soohyun Lee, Srimanta Panda, Stefano Buora, Stefan Sauer, Stéphane +Cerveau, Stian Selnes, Sumaid Syed, Swayamjeet, Thiago Santos, Thibault +Saunier, Thomas Bluemel, Thomas Coldrick, Thor Andreassen, Tim-Philipp +Müller, Ting-Wei Lan, Tobias Ronge, trilene, Tulio Beloqui, U. Artie +Eoff, VaL Doroshchuk, Varunkumar Allagadapa, Vedang Patel, Veerabadhran +G, Víctor Manuel Jáquez Leal, Vivek R, Vivia Nikolaidou, Wangfei, Wang +Zhanjun, Wim Taymans, Wonchul Lee, Xabier Rodriguez Calvar, Xavier +Claessens, Xidorn Quan, Xu Guangxin, Yan Wang, Yatin Maan, Yeongjin +Jeong, yychao, Zebediah Figura, Zeeshan Ali, Zeid Bekli, Zhiyuan Sraf, +Zoltán Imets, … and many others who have contributed bug reports, translations, sent suggestions or helped testing. @@ -184,11 +2179,7 @@ the git 1.18 branch, which will be a stable branch. 1.18.0 -1.18.0 has not been released yet. - -Known Issues - -- FIXME +1.18.0 was released on 7 September 2020. Schedule for 1.20 @@ -196,7 +2187,9 @@ Our next major feature release will be 1.20, and 1.19 will be the unstable development version leading up to the stable 1.20 release. The development of 1.19/1.20 will happen in the git master branch. -The plan for the 1.20 development cycle is yet to be confirmed. +The plan for the 1.20 development cycle is yet to be confirmed, but it +is now expected that feature freeze will take place some time in January +2021, with the first 1.20 stable release around February/March 2021. 1.20 will be backwards-compatible to the stable 1.18, 1.16, 1.14, 1.12, 1.10, 1.8, 1.6, 1.4, 1.2 and 1.0 release series. @@ -204,6 +2197,8 @@ The plan for the 1.20 development cycle is yet to be confirmed. ------------------------------------------------------------------------ These release notes have been prepared by Tim-Philipp Müller with -contributions from … (FIXME) +contributions from Mathieu Duponchelle, Matthew Waters, Nirbheek +Chauhan, Sebastian Dröge, Thibault Saunier, and Víctor Manuel Jáquez +Leal. License: CC BY-SA 4.0 |