<div class="gmail_quote">On Mon, May 31, 2010 at 11:53 PM, Rodney Dowdall <<a href="mailto:rdowdall@cranksoftware.com">rdowdall@cranksoftware.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> Hello I am trying to play the audio and the video from a mp4 file. If I run the following line: gst-launch -vvvvv --gst-debug-level=2 playbin uri=<a>file:///</a><path_to_mp4_file> Then it plays the file's audio. I'm not putting the video anywhere, so I can't see if it is playing or not, but I assume it is based on the debug output. If I do the following line: gst-launch -vvv --gst-debug-level=2 filesrc location=<path_to_mp4_file> ! decodebin2 name=decoder decoder. ! audioconvert ! audioresample ! osssink decoder. ! ffmpegcolorspace ! xvimagesink It hangs at: Setting pipeline to PAUSED .. /GstPipeline:pipeline0/GstDecodeBin2:decoder/GstTypeFindElement:typefind.GstPad:src: caps = audio/x-m4a Pipeline is PREROLLING ... <audio debug output snipped> </div></blockquote><div> You need to put 'queue' after each decodebin2's branch to start a new thread for them. The docs should have some more information about this: <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-threads.html#section-threads-uses">http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/chapter-threads.html#section-threads-uses</a> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div bgcolor="#ffffff" text="#000000"> I need to open this file in C code, and grab access to the buffers. I was planning on using appsink to do it, but any time I pass in a video sink to the pipeline, it just hangs, never playing the audio, or moving forward. As I said, I need access to the video buffer, so either I need a way to grab it from the pipeline created from gst_parse_launch, or I was thinking that if I set up the pipeline myself, I could use a handoff signal on the last video sink, or mayber use the appsink methods. </div></blockquote><div> FYI, you can set the video-sink property in playbin2 to your appsink and get the buffers from there. </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <div bgcolor="#ffffff" text="#000000"> I have a feeling that I am missing something simple, and was hoping someone could point that out. Thanks, Rodney <div>-- Rodney Dowdall Crank Software Inc. Office: 613-595-1999 Online: <a href="http://www.cranksoftware.com/" target="_blank">www.cranksoftware.com</a> Check out: <a href="http://cranksoftware.com/blog/" target="_blank">Crank Software’s Blog</a> </div> </div> ------------------------------------------------------------------------------ _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div> -- Thiago Sousa Santos