<div> Set num-buffers property in alsasrc .</div> <div> </div> <div> </div> <div class="gmail_quote">On Wed, Oct 7, 2009 at 12:37 PM, Yiliang Bao <<a href="mailto:yiliangb@gmail.com">yiliangb@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> Hi, I used the following pipeline: gst-launch alsasrc ! faac, bitrate=48000, profile=2 ! mp4mux ! filesink location=test.m4a The file was generated, but it could not be played back by gstreamer using the following pipeline: gst-launch filesrc location=test.m4a ! decodebin ! autoaudiosink Following messages are generated. It seems that the file was not generated properly. Setting pipeline to PAUSED ... Pipeline is PREROLLING ... ERROR: from element /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0: This file is invalid and cannot be played. Additional debug info: qtdemux.c(1447): gst_qtdemux_loop_state_header (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstQTDemux:qtdemux0: Header atom 'mdat' has empty length ERROR: pipeline doesn't want to preroll. Setting pipeline to NULL ... Freeing pipeline ... I checked the binary, and the length field of mdat is indeed 0, and I could not find any atoms, like moov, mvhd, etc., that describe the media. Is this the right pipeline to capture audio in MP4 file? Thanks!! Yiliang -- View this message in context: <a href="http://www.nabble.com/Could-not-capture-AAC-audio-in-mp4mux-properly%2C-help-%21%21%21-tp25781565p25781565.html" target="_blank">http://www.nabble.com/Could-not-capture-AAC-audio-in-mp4mux-properly%2C-help-%21%21%21-tp25781565p25781565.html</a> Sent from the GStreamer-devel mailing list archive at Nabble.com. ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! <a href="http://p.sf.net/sfu/devconference" target="_blank">http://p.sf.net/sfu/devconference</a> _______________________________________________ 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> <div></div> -- Regards, Sudarshan Bisht