[Bug 733565] New: Pipeline with png cannot be rendered

[GStreamer (bugzilla.gnome.org)]

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

           Summary: Pipeline with png cannot be rendered
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-editing-services
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: lubosz at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=281393)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=281393)
xges to reproduce the bug.

GES cannot render pipelines which contain a PNG. The behavior is different for
different encoders and muxers.

The playback of the timeline is fine.

ogg/theora: corrupted buffers are stored instead of the PNG. Rendering
finished.
webm/vp8: works
qt/h264: rendering stops at the position where image and video meet.

These clip layouts do not work:

[ video ][ png ]
[ png ][ video ]

This works:

[ png ]

JPEG also works.

For the quicktime / h264 case, where the pipeline times out, this is printed in
the debug log in a infinite loop, when the timeline "stops":

FIXME                    bin gstbin.c:4023:gst_bin_query: implement duration
caching in GstBin again

The quicktime muxer produces following warning:

WARN                   qtmux
gstqtmux.c:3253:gst_qt_mux_video_sink_set_caps:<muxer> pad video_0 refused
renegotiation to video/x-h264, ...

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