[Bug 704193] New: [videodecoder] no PTS nor DTS on decoded frame

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=704193
  GStreamer | gst-plugins-base | 1.1.2

           Summary: [videodecoder] no PTS nor DTS on decoded frame
    Classification: Platform
           Product: GStreamer
           Version: 1.1.2
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: rawoul at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


In some cases the libav decoders do not output any timestamp on decoded frames
in 1.1. This seems to be due to a regression compared to 1.0 in the
videodecoder base class.

To reproduce:

gst-launch-1.0 -v pushfilesrc real-filesrc::location=<path_to_avi_file> !
avidemux ! avdec_mpeg4 ! fakesink silent=false

When avidemux is activated in pull mode it works:

gst-launch-1.0 -v filesrc location=<path_to_avi_file> ! avidemux ! avdec_mpeg4
! fakesink silent=false

I can see that in the second case the videodecoder logs outputs the following:

videodecoder
gstvideodecoder.c:2252:gst_video_decoder_prepare_finish_frame:<avdec_mpeg4-0>
no valid PTS, using oldest DTS 0:00:00.291958333

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