hi, i used "qtdemux",but it is the same as before. if i add "queue" behind the decoder element, it works well: gst-launch --gst-debug-level=queue:3 filesrc location=/usr/local/demo/z.mp4 ! ffdemux_mov_mp4_m4a_3gp_3g2_<div id=":a8">mj2 name=demux demux.video_00 ! queue ! ffdec_mpeg4 ! queue ! ffmpegcolorspace ! videoscale ! ximagesink demux.audio_00 ! queue ! faad ! queue ! alsasink however, there are also problems when i play some other files in my own arm based developed board just use the command like above, and i am sure the command i used is right ,because i use the same command in PC, and it works well, but in my own board ,the sound will disappear, and the video playback smoothly. i am doing AV synchronization test, so i want to know how can i get timestamp of audio and video, are there any ways to test AV synchronization ? pls give me some suggestion ,i will be very appreciate. daisy </div> <div class="gmail_quote">2011/3/13 <<a href="mailto:gstreamer-embedded-request@lists.freedesktop.org">gstreamer-embedded-request@lists.freedesktop.org</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Send gstreamer-embedded mailing list submissions to <a href="mailto:gstreamer-embedded@lists.freedesktop.org">gstreamer-embedded@lists.freedesktop.org</a> To subscribe or unsubscribe via the World Wide Web, visit <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded</a> or, via email, send a message with subject or body 'help' to <a href="mailto:gstreamer-embedded-request@lists.freedesktop.org">gstreamer-embedded-request@lists.freedesktop.org</a> You can reach the person managing the list at <a href="mailto:gstreamer-embedded-owner@lists.freedesktop.org">gstreamer-embedded-owner@lists.freedesktop.org</a> When replying, please edit your Subject line so it is more specific than "Re: Contents of gstreamer-embedded digest..." Today's Topics: 1. sound disappear (???) 2. Re: sound disappear (Michael Smith) ---------------------------------------------------------------------- Message: 1 Date: Sat, 12 Mar 2011 10:06:50 +0800 From: ??? <<a href="mailto:daisy0719@gmail.com">daisy0719@gmail.com</a>> Subject: sound disappear To: <a href="mailto:gstreamer-embedded@lists.freedesktop.org">gstreamer-embedded@lists.freedesktop.org</a> Message-ID: <<a href="mailto:AANLkTin1YE0cbjYU-6eOVwQdAOypUg_cfcmhb5hgoLQ4@mail.gmail.com">AANLkTin1YE0cbjYU-6eOVwQdAOypUg_cfcmhb5hgoLQ4@mail.gmail.com</a>> Content-Type: text/plain; charset="gb2312" hello: I use the following command to play a media file? gst-launch --gst-debug-level=queue:3 filesrc location=/usr/local/demo/z.mp4 ! ffdemux_mov_mp4_m4a_3gp_3g2_mj2 name=demux demux.video_00 ! queue ! ffdec_mpeg4 ! ffmpegcolorspace ! videoscale ! ximagesink demux.audio_00 ! queue ! faad ! alsasink the video image playback smooth, but the sound began to emerge only in the 3 to 10 seconds ?then it will disappear to the end, and in the middle there will be some noise , but i can not see the debugging information to knowwhere a problem is,. How to solve this problem? Can you tell me how better to debug? Also,how can i get the time stamp information of audio and video? pls help me, thank very much! daisy Here are my media files Info: PS: MP4 file info: General Complete name : E:\demo\z.mp4 Format : MPEG-4 Format profile : Base Media / Version 2 Codec ID : mp42 File size : 38.0 MiB Duration : 21mn 47s Overall bit rate : 244 Kbps Encoded date : UTC 2009-08-29 09:23:08 Tagged date : UTC 2009-08-29 09:23:08 Video ID : 1 Format : MPEG-4 Visual Format profile : Simple@L1 Format settings, BVOP : No Format settings, QPel : No Format settings, GMC : No warppoints Format settings, Matrix : Default (H.263) Codec ID : 20 Duration : 21mn 47s Bit rate mode : Variable Bit rate : 216 Kbps Width : 320 pixels Height : 240 pixels Display aspect ratio : 4:3 Frame rate mode : Constant Frame rate : 14.985 fps Resolution : 24 bits Colorimetry : 4:2:0 Scan type : Progressive Bits/(Pixel*Frame) : 0.187 Stream size : 33.6 MiB (88%) Writing library : Lavc51.10.0 Encoded date : UTC 1970-01-01 00:00:00 Tagged date : UTC 2009-08-29 09:23:21 Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format version : Version 4 Format profile : LC Format settings, SBR : Yes Format settings, PS : Yes Codec ID : 40 Duration : 21mn 46s Bit rate mode : Variable Bit rate : 27.4 Kbps Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 32.0 KHz Resolution : 16 bits Stream size : 4.28 MiB (11%) Encoded date : UTC 1970-01-01 00:00:00 Tagged date : UTC 2009-08-29 09:23:21 -------------- next part -------------- An HTML attachment was scrubbed... URL: <<a href="http://lists.freedesktop.org/archives/gstreamer-embedded/attachments/20110312/13318c9f/attachment-0001.htm" target="_blank">http://lists.freedesktop.org/archives/gstreamer-embedded/attachments/20110312/13318c9f/attachment-0001.htm</a>> ------------------------------ Message: 2 Date: Fri, 11 Mar 2011 21:09:09 -0800 From: Michael Smith <<a href="mailto:msmith@xiph.org">msmith@xiph.org</a>> Subject: Re: sound disappear To: Discussions specific to using GStreamer on embedded systems <<a href="mailto:gstreamer-embedded@lists.freedesktop.org">gstreamer-embedded@lists.freedesktop.org</a>> Message-ID: <<a href="mailto:AANLkTikv1mK0rJ4dgM_3J-_uqKNConx2g2ap9HYwh6%2Br@mail.gmail.com">AANLkTikv1mK0rJ4dgM_3J-_uqKNConx2g2ap9HYwh6+r@mail.gmail.com</a>> Content-Type: text/plain; charset=GB2312 2011/3/11 ??? <<a href="mailto:daisy0719@gmail.com">daisy0719@gmail.com</a>>: > hello: > > I use the following command to play a media file? > > gst-launch --gst-debug-level=queue:3 filesrc location=/usr/local/demo/z.mp4 > ! ffdemux_mov_mp4_m4a_3gp_3g2_mj2 name=demux demux.video_00 ! queue ! > ffdec_mpeg4 ! ffmpegcolorspace ! videoscale ! ximagesink demux.audio_00 ! > queue ! faad ! alsasink Under no circumstances should that ffmpeg demuxer be used for any purpose. Does it work if you use qtdemux? qtdemux is the only supported demuxer to use for qt and derived file formats (including mp4). Mike ------------------------------ _______________________________________________ gstreamer-embedded mailing list <a href="mailto:gstreamer-embedded@lists.freedesktop.org">gstreamer-embedded@lists.freedesktop.org</a> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded</a> End of gstreamer-embedded Digest, Vol 2, Issue 2 ************************************************ </blockquote></div>