[gstreamer-bugs] [Bug 550472] [mpegtsdemux] Fails to demux video/mpeg, mpegversion=4 streams

GStreamer (bugzilla.gnome.org) bugzilla at gnome.org
Wed Nov 4 12:52:19 PST 2009


https://bugzilla.gnome.org/show_bug.cgi?id=550472
  GStreamer | gst-plugins-bad | git

--- Comment #10 from vanista <vanista at gmail.com> 2009-11-04 20:52:15 UTC ---
Video properties such as dimensions or framerate are out of the scope of the
demuxer. FFMPEG's demuxes cheat in that regard by parsing the streams. The
decoder should be capable of handling a raw stream without parameters. If it
can't, maybe the encoding/muxing did not provide the required codec data.

For instance, H.264 has parameter sets on IDR frames which must be kept intact
when muxed in a Transport Stream. The TS format doesn't specify a way to
contain codec data so it must be embedded in the bitstream.

I'm not sure what's the specification for codec data in MPEG-4 but it's
probably missing in this case.

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