[Bug 44325] New: Microsoft Powerpoint 2010: hangs up when seeking mp4 video

https://bugs.winehq.org/show_bug.cgi?id=44325

Bug ID: 44325
           Summary: Microsoft Powerpoint 2010: hangs up when seeking mp4
                    video
           Product: Wine
           Version: 3.0-rc4
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: winegstreamer
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Microsoft Powerpoint 2010 hangs up when seeking playing video.

I have tried to install MS Office 2010 on Wine 3.0-rc4, everything works like a
charm. I was able to embed and play mp4 videos (only mp4) with Powerpoint; but
when seeking, Powerpoint was suspended and could not return.

But when I completely remove the audio channel from the file by "ffmpeg -i
videoAndAudio.mp4 -c copy -an onlyVideo.mp4" command (only keep the video
channel) and insert again, this hangup error has disappearred.

So when I rebuilt from source to reproduce this error, I found that the bug
occurs at dlls/winegstreamer/gst_cbs.c:call_cb function, where wait for
condition pthread_cond_wait(&cbdata->cond, &cbdata->lock); and somewhere in
dlls/winegstreamer/gstdemux.c:dispatch_thread. May be there is a deadlock with
the synchronization of the audio and video channel.

OS: Kubuntu 17.04 zesty
MSOffice 2010 with no service pack
riched20 (natice, builtin)
msxml6 from winetricks (native, builtin)

libgstreamer1.0-0
libgstreamer-pligins-{bad,base,good}1.0-0

Give me feedback if you need more information.

Thanks & best regards
Ha Binh Xuyen