RELEASE: GStreamer Core and Plugins 1.1.2

Sebastian Dröge slomo at
Thu Jul 11 08:15:53 PDT 2013

The GStreamer project announces a new development release with feature
additions for the API and ABI-stable 1.x series of the GStreamer
multimedia framework.

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 1.1 development releases will lead to the next stable 1.2.x release
series, which will be 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. The newly added API and ABI can still change until the 1.2.0
release, as such distribution packagers should not include 1.1.x in
their distributions but wait until 1.2.0.

The versioning scheme that is used in general is that 1.x.y is API and
ABI backwards compatible with previous 1.x.y releases. If x is an even
number it is a stable release series and all releases in this series
will only contain important bugfixes, e.g. the 1.0 series with 1.0.7. If
x is odd it is a development release series that will lead to the next
stable release series 1.x+1 and contains new features and bigger
changes. During the development release series, new API can still

Changes since 1.0:

New API:
 • GstContext negotiation / sharing / announcing for sharing a
   generic context between elements, e.g. a display handle
 • GL texture upload conversion meta for allowing different
   buffer types to be converted to an OpenGL texture
 • GstCapsFeatures as extension to GstCaps for allowing the
   negotiation of specific memory or meta requirements between
 • GstMemory flags for contiguous and non-mappable memory
 • The stream-start event has optional flags now, e.g. for signalling
   sparse streams
 • Allocators library in gst-plugins-base, currently only with generic
   dmabuf memory support
 • insertbin library for easier handling of dynamically linked
   pipelines (in -bad for now)
 • EGL helper library (in -bad for now)
 • MPEG-TS data structure library (in -bad for now)

Major changes:
 • New plugins:
   ∘ mssdemux for Microsoft Smooth Streaming
   ∘ dashdemux for DASH adaptive streaming protocol
   ∘ bluez for interaction with Bluetooth devices
   ∘ openjpeg for JPEG2000 decoding and encoding
   ∘ daala for experimental Daala decoding and encoding
   ∘ vpx plugin has experimental V9 decoding and encoding support
   ∘ Various others: yadif, srtp, sbc, fluidsynth, midiparse,
     mfc, ivtv, accuraterip and audiofxbad

 • Moved plugins:
   ∘ dtmf, vp8rtp, scaletempo and rtpmux plugins are in
     gst-plugins-good now

 • Video:
   ∘ Fix handling of interlaced video in converters such as videoscale
     and videoconvert (e.g. scale both fields independently)
   ∘ videoconvert will try harder to minimise quality losses when
     conversion is necessary
   ∘ The experimental GstSurfaceConverter, GstSurfaceMeta and
     GstVideoContext APIs from the (confusingly-named) 
     libgstbasevideo-1.0 library in gst-plugins-bad have now been
     removed and been replaced by new APIs in GStreamer Core and
     gst-plugins-base (see above). Since that was all that was left in
     this library, the entire experimental libgstbasevideo-1.0 library
     has been removed from gst-plugins-bad.
   ∘ Chroma subsampling and siting conversion is better handled in

 • Audio:
   ∘ adder now allows muting/unmuting of its input streams, and also
     per-input stream volume 

 • Platform specific changes:
   ∘ Caps, events, etc. are now printed in the GStreamer debug logs
     with their content instead of just the pointer address even on
     non-glibc platforms (e.g. Windows, OSX, Android).
   ∘ Network elements (UDP/TCP) now work better with platforms,
     where IPv6 sockets can't handle IPv4 (e.g. Windows)
   ∘ Windows: d3dvideosink provides a bufferpool to upstream elements
   ∘ Linux/BSD: v4l2 had many improvements and cleanups

 • Other changes:
   ∘ gst-libav now uses libav 9
   ∘ Static linking of plugins is supported now (also in 1.0.7)
   ∘ rtspsrc: add support for NetClientClock: when the server suggests a
     GstNetTimeProvider in the SDP, set up a GstNetClientClock that
     slaves to the remote clock and suggest this clock in provide_clock.
     Simplifies synchronized playback of a resource from an RTSP server.
     gst-rtsp-server now supports adding this to the SDP and can provide
     a network clock
   ∘ Changes to many elements and core to use the correct sticky event
     order and also not lose any important sticky events during flushing
   ∘ 345 fixed bug reports, and many other bug fixes and other
     improvements everywhere that had no bug report

Things to look out for:
 • Single header includes for all libraries, e.g. #include
   <gst/video/video.h> - this was needed for some bindings.
   Unfortunately this could not be done in a way that doesn't cause
   compiler issues with older code. You may need to move some code to
   single includes (make sure to #if #else on the version macros if you
   need to keep supporting 1.0.x versions as well). Binary compatibility
   is not affected by this.
 • Stricter (correct) caps subset checking in some cases where this was
   not correct before. Caps will now always fail to be a compatible
   subset of another set of caps if the subset caps are missing some
   fields that the superset caps have. This might lead to not-negotiated
   errors if caps are incomplete now. However, it also prevents possible
   data corruption caused by piping data formatted in an
   incompatible/unexpected way into some elements. Check your h264 caps
   for stream-format and alignment fields and AAC caps for the
   stream-format field. This change will also be included in the next
   stable 1.0.8 release.
 • Stricter checking for missing events and correct sticky event order
   (stream-start, caps, segment) in some places; this is not enabled in
   stable releases by default, but you may get warnings when using git
   builds, development releases or when compiling with
 • x264enc now outputs data in byte-stream by default if downstream has
   ANY caps (e.g. appsink without caps set, filesink, udpsink,
   tcpserversink etc.)

Release tarballs can be downloaded directly from:
979e279184d12da20b90b4aaa8aee3032fc44eade6928fca0bc59d7e8f1b6597  gstreamer-1.1.2.tar.xz
25d82ee43c891d6154ea689cad597ab68f7dafe200163a5df6855934dddf1857  gst-plugins-base-1.1.2.tar.xz
30f0475ae115000a18f96efd738cc17e27e3384f69ab62b68824667f002ccc74  gst-plugins-good-1.1.2.tar.xz
be5fdce6fc2483df10cb5dde96a769f5891f062e6117a5a3b848da4604732149  gst-plugins-bad-1.1.2.tar.xz
fbb85107e6adac503733b8ee9b3ffd469bea90ac801eda0686574b62a613adcc  gst-plugins-ugly-1.1.2.tar.xz
08b7d832c7f9a510f99ee5fd1a006426c8d357230b971f3f4de8b09a4d66bfd9  gst-libav-1.1.2.tar.xz

As always, please let us know of any issues you run into by filing a bug
in Bugzilla:
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