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_ 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 2011/3/13 <gstreamer-embedded-request at lists.freedesktop.org> > Send gstreamer-embedded mailing list submissions to > gstreamer-embedded at lists.freedesktop.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded > or, via email, send a message with subject or body 'help' to > gstreamer-embedded-request at lists.freedesktop.org > > You can reach the person managing the list at > gstreamer-embedded-owner at lists.freedesktop.org > > 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: ??? <daisy0719 at gmail.com> > Subject: sound disappear > To: gstreamer-embedded at lists.freedesktop.org > Message-ID: > <AANLkTin1YE0cbjYU-6eOVwQdAOypUg_cfcmhb5hgoLQ4 at mail.gmail.com> > 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 at 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: < > http://lists.freedesktop.org/archives/gstreamer-embedded/attachments/20110312/13318c9f/attachment-0001.htm > > > > ------------------------------ > > Message: 2 > Date: Fri, 11 Mar 2011 21:09:09 -0800 > From: Michael Smith <msmith at xiph.org> > Subject: Re: sound disappear > To: Discussions specific to using GStreamer on embedded systems > <gstreamer-embedded at lists.freedesktop.org> > Message-ID: > <AANLkTikv1mK0rJ4dgM_3J-_uqKNConx2g2ap9HYwh6+r at mail.gmail.com> > Content-Type: text/plain; charset=GB2312 > > 2011/3/11 ??? <daisy0719 at gmail.com>: > > 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 > gstreamer-embedded at lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/gstreamer-embedded > > > End of gstreamer-embedded Digest, Vol 2, Issue 2 > ************************************************ > -------------- next part -------------- An HTML attachment was scrubbed... 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