Hi, I have try some test, it seems if you dont put the pipevideo to pause, and you put pieAudio to play it works. I dont know why, moreover if I put your main pipeline to play it crashes, in my code it dont crashes. For your notify caps, I have never be able to retrieves info, I use have type callback. For your have data function, I would have make a hand off callback instead. This code works fine with me. Try it, Erwan <div>2007/5/14, fabien <<a href="mailto:fabien.castan@free.fr">fabien.castan@free.fr</a>>:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Thank you for your fast answer. But I did remove the capsfilter but it still doesn't work... :( From time to time, the sound begins to play and stop after 2 seconds or so and I get no video. Fabien Erwan Masson a écrit : > Hello, >  Remove the capsfilter and it will works:) . > I used capsfilter linked with fakesink to grab each frame in a > specific format(with a hand off signal). >  Erwan > > > 2007/5/14, Michael Smith < <a href="mailto:msmith@fluendo.com">msmith@fluendo.com</a> > <mailto:<a href="mailto:msmith@fluendo.com">msmith@fluendo.com</a>>>: > >     On Mon, 2007-05-14 at 14:14 +0200, fabien wrote: >     > Hello, >     > I tested your code, but it still doesn't work. If I comment the >     video >     > part, the audio is playing (from avi file but not from mpeg..). >     So it >     > must be an error on the video pipeline. I made a sketch of the >     pipeline... >     > If anyone could find the error, it would be of great help for me. >     > Thank you >     > > >     You're using a capsfilter to force a particular pixel format, >     size, and >     framerate. > >     You use ffmpegcolorspace (which can convert to the required pixel >     format), but you don't have anything to convert to the size and >     framerate you're asking for. > >     One specific problem you're likely to run into is that many files have >     non-square pixels, but ximagesink requires square pixels. You can use >     the 'videoscale' element to resize appropriately. > >     You can also try using videorate to change video framerate. > >     There may be other problems with your code, I didn't read it >     closely or >     try it myself. > >     Mike > > </blockquote></div>