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Release notes for GStreamer Base Plugins 1.4.2

The GStreamer team is pleased to announce a bugfix release of the stable 1.4 release series. The 1.4 release series is adding new features on top of the 1.2 series and is part of the API and ABI-stable 1.x release series of the GStreamer multimedia framework that contains new features. The 1.4.x bugfix releases only contain important bugfixes compared to 1.4.0.

Binaries for Android, iOS, Mac OS X and Windows are provided by the GStreamer project for this release.

The 1.x series is a stable series targeted at end users. It is not API or ABI compatible with the 0.10.x series. It can, however, be installed in parallel with the 0.10.x series and will not affect an existing 0.10.x installation.

The stable 1.4.x release series is API and ABI compatible with 1.0.x and any other 1.x release series in the future. Compared to 1.0.x it contains some new features and more intrusive changes that were considered too risky as a bugfix.

This module contains a set of reference plugins, base classes for other plugins, and helper libraries. It also includes essential elements such as audio and video format converters, and higher-level components like playbin, decodebin, encodebin, and discoverer. This module is kept up-to-date together with the core developments. Element writers should look at the elements in this module as a reference for their development. This module contains elements for, among others:

  • device plugins: x(v)imagesink, alsa, v4lsrc, cdparanoia
  • containers: ogg
  • codecs: vorbis, theora
  • text: textoverlay, subparse
  • sources: audiotestsrc, videotestsrc, giosrc
  • network: tcp
  • typefind functions
  • audio processing: audioconvert, adder, audiorate, audioresample, volume
  • visualisation: libvisual
  • video processing: videoconvert, videoscale
  • high-level components: playbin, uridecodebin, decodebin, encodebin, discoverer
  • libraries: app, audio, fft, pbutils, riff, rtp, rtsp, sdp, tag, video
Other modules containing plugins are:
contains a set of well-supported plugins under our preferred license
contains a set of well-supported plugins, but might pose problems for distributors
contains a set of less supported plugins that haven't passed the rigorous quality testing we expect, or are still missing documentation and/or unit tests
contains a set of codecs plugins based on libav (formerly gst-ffmpeg)

Bugs fixed in this release

  • 732908 : audioresample: skips samples unless input buffers have correct size
  • 727255 : playbin: filter out buffering messages when switching URI and the previous URI is still playing
  • 729811 : output-selector: test example in gstreamer plugin base is giving " Internal data flow error "
  • 735569 : rtspconnection: Crash due to no protection of watchs readsrc
  • 735748 : playbin: can't play an avi file in totem with audio-filter=scaletempo
  • 735800 : textoverlay: Two textoverlay in sequence fail to negotiate (regression)
  • 735844 : basetextoverlay/pango: overlay negotiation fails when it should not
  • 735952 : videorate: GstStructure refcount critical message
  • 736071 : audiobasesink: Don't hold object lock while calling into other objects like the clock
  • 736118 : videofilter: The buffer is not writable in transform_frame_ip
  • 736739 : audiocdsrc: do not leak uid after parsing TOC select event
  • 736779 : typefind: h265 IRAP picture always true
  • 736788 : audiodecoder: leaks events
  • 736796 : videoencoder: do not leak events when flushing them
  • 736861 : playbin: Reference count bug
  • 736679 : videodecoder: do not leak pool and allocator in error case


You can find source releases of gst-plugins-base in the gst-plugins-base download directory.

The git repository and details how to clone it can be found at .


The project's website is

Support and Bugs

We use GNOME's bugzilla for bug reports and feature requests.

Please submit patches via bugzilla as well.

For help and support, please subscribe to and send questions to the gstreamer-devel mailing list (see below for details).

Find us on IRC at #gstreamer.


Git is hosted on You can browse the gst-plugins-base repository.

All code is in Git and can be checked out from there.

Interested developers of the core library, plugins, and applications should subscribe to the gstreamer-devel list.

Contributors to this release

  • Andrei Sarakeev
  • Arnaud Vrac
  • Garg
  • George Kiagiadakis
  • Göran Jönsson
  • Kipp Cannon
  • Ognyan Tonchev
  • Ravi Kiran K N
  • Sebastian Dröge
  • Thiago Santos
  • Vineeth T M

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