[Bug 720216] New: Errors in transcoded webm file

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=720216
  GStreamer | don't know | unspecified

           Summary: Errors in transcoded webm file
    Classification: Platform
           Product: GStreamer
           Version: unspecified
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: don't know
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: gdesmott at gnome.org
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Looks like there are things very wrong with this file:
http://agot.be/~lachambre/bug/20131205-1_bb_pl.webm

It has been created using:
gst-launch-1.0 rtspsrc
location="rtsp://193.191.129.52/Archive/20131205-1_bb_pl.wmv"
protocols=0x00000004 ! decodebin name=demux ! queue ! videoconvert ! vp8enc !
webmmux name=mux ! filesink location=20131205-1_bb_pl.webm demux. ! queue !
audioconvert ! audioresample ! vorbisenc ! mux.

This has been done on a Debian stable system using wheezy-backports packages:
libgstreamer1.0-0:amd64               1.0.8-1~bpo70+1
libgstreamer-plugins-base1.0-0:amd64  1.0.8-1~bpo70+1
gstreamer1.0-plugins-good:amd64       1.0.8-1~bpo70+1
gstreamer1.0-plugins-ugly:amd64       1.0.8-1~bpo70+1
gstreamer1.0-plugins-bad:amd64        1.0.8-1~bpo70+1
gstreamer1.0-libav:amd64              1.0.8-1~bpo70+1

I tried to transcode it to MP4 on my own system (F19 with GStreamer master) and
hit a lot of those errors:
qtmux gstqtmux.c:2232:gst_qt_mux_add_buffer: decreasing DTS value
0:00:00.023158730 < 0:00:00.070158730

I used "gst-launch-1.0 filesrc location=20131205-1_bb_pl.webm ! decodebin
name=demux ! queue ! videoconvert ! videoparse ! x264enc ! mp4mux name=mux !
filesink location=out.mp4 demux. ! queue ! audioconvert ! audioresample !
audioparse ! faac ! mux."

After some debugging on #gstreamer it seems that there are issues in the source
webm file.

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