[Bug 733565] Pipeline with png cannot be rendered

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=733565
  GStreamer | gst-editing-services | git

--- Comment #1 from Lubosz Sarnecki <lubosz at gmail.com> 2014-07-22 18:21:34 UTC ---
Testing with MKV shows that qtmux is preventing the png to be encoded, since
matroskamux does fine with h264.

Testing with vp8 and qtmux shows that the issue is related to the combination
of h264 and qtmux, since vp8 and qtmux work.

The pipeline stops running when a png related timeline change occurs with qtmux
and h264.

A theora encoded mkv shows the same corruptions as in the ogg container. So the
thora encoder does not handle png. Maybe this should be in a separate bug
report.

The GES PNG bug matrix.

Theora |  C     0     C

VP8    |

H264   |        S

       | MKV | MP4 | OGG

C - Output is corrupted
S - Pipeline stops rendering
0 - Not muxable

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