GStreamer 1.26 and Igalia

• 29 May 2025
• gstreamer

The release of GStreamer 1.26, last March, delivered new features, optimization and improvements. Igalia played its role as long standing contributor, with 382 commits (194 merge requests) from a total of 2666 of commits merged in this release.This blog post takes a closer look on those contributions.

gst-devtools #

This module contains development and validation tools.

gst-dot-viewer #

gst-dot-viewer is a new web tool for real-time pipeline visualization. Our colleague, Thibault, wrote a blog post about its usage.

validate #

GstValidate is a tool to check if elements are behaving as expected.

• Added support for HTTP Testing.
• Scenario fixes such as reset pipelines on expected errors to avoid inconsistent states, improved error logging, and async action handling to prevent busy loops.

gst-editing-services #

GStreamer Editing Services is a library to simplify the creation of multimedia editing applications.

• Enabled reverse playback, by adding a reverse property to nlesource for seamless backward clip playback.
• Added internal tests for Non-Linear Engine elements.

gst-libav #

GStreamer Libav plug-in contains a set of many popular decoders and encoders using FFmpeg.

• As part of the effort to support VVC/H.266 in GStreamer FFmpeg VVC/H.266 decoder was exposed.
• Optimized framerate renegotiation in avviddec without decoder resets.
• Mapped GST_VIDEO_FORMAT_GRAY10_LE16 format to FFmpeg’s equivalent.

gstreamer #

Core library.

• Added a tracer for gst-dots-viewer.
• Log tracers improvements such as, replaced integer codes with readable strings, to track pad’s sticky events, and simplify parameters handling, etc.
• On pads, don’t push sticky events in response to a FLUSH_STOP event.
• On queue element, fixed missing notify signals for level changes.
• Pipeline parser now logs bus error messages during pipeline construction.
• Fixed gst_util_ceil_log2 utility function.

gst-plugins-base #

GStreamer Base Plugins is a well-groomed and well-maintained collection of plugins. It also contains helper libraries and base classes useful for writing elements.

• audiorate: respect tolerance property to avoid unnecessary sample adjustments for minor gaps.
• audioconvert: support reordering of unpositioned input channels.
• videoconvertscale: improve aspect ratio handling.
• glcolorconvert: added I422_10XX, I422_12XX, Y444_10XX, and Y444_16XX color formats, and fixed caps negotiation for DMABuf.
• glvideomixer: handle mouse events.
• pbutils: added VVC/H.266 codec support
• encodebasebin: parser fixes.
• oggdemux: fixed seek to the end of files.
• rtp: fixed precision for UNIX timestamp.
• sdp: enhanced debugging messages.
• parsebin: improved caps negotiation.
• decodebin3: added missing locks to prevent race conditions.
• streamsynchronizer: improved documentation.

gst-plugins-good #

GStreamer Good Plugins is a set of plugins considered to have good quality code, correct functionality, and uses LGPL/LGPL+compatible licenses.

• hlsdemux2: handle empty segments at the beginning of a stream.
• qtmux and matroska: add support for VVC/H.266.
• matroskademux:support seek with stop in push mode.
• rtp: several fixes.
• osxaudio: fixes.
• videoflip: support Y444_16LE and Y444_16BE color formats.
• vpx: enhance error and warning messages.

gst-plugins-bad #

GStreamer Bad Plug+ins is a set of plugins that aren’t up to par compared to the rest. They might be close to being good quality, but they’re missing something, be it a good code review, some documentation, a set of tests, etc.

• dashsink: a lot of improvements and cleanups, such as unit tests, state and event management.
• h266parse: enabled vvc1 and vvi1 stream formats, improved code data parsing and negotiatios, along with cleanups and fixes.
• mpegtsmux and tsdemux: added support for VVC/H.266 codec.
• vulkan:
  • Added compatibility for timeline semaphores and barriers.
  • Initial support of multiple GPU and dynamic element registering.
  • Vulkan image buffer pool improvements.
  • vulkanh264dec: support interlaced streams.
  • vulkanencoding: rate control and quality level adjustments, update SPS/PPS, support layered DPBs.
• webrtcbin:
  • Resolved duplicate payload types in SDP offers with RTX and multiple codecs.
  • Transceivers are now created earlier during negotiation to avoid linkage issues.
  • Allow session level in setup attribute in SDP answer.
• wpevideosrc:
  • code cleanups
  • cached SHM buffers are cleared after caps renegotiation.
  • handle latency queries and post progress messages on bus.
• srtdec: fixes
• jpegparse: handle avi1 tag for progressive images
• va: improve encoders configuration when properties change in run+time, specially rate control.

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