[gst-devel] problem with mpeg-1 av synchronization and oss gstosshelper.c:246 error

puppy little mypuppy9999 at gmail.com
Tue Sep 30 16:44:33 CEST 2008


HI all,
I develop a media player based gstreamer on S3C2440 board. my gstreamer
version is latest .
when i construct a pipeline:
gst-launch filesrc location=/tmp/MPEG-1.mpg ! mpegdemux name=t  !  mad !
queue2 !  audioconvert ! audioresample ! queue2 ! osssink sync=0 t. !
mpeg2dec ! queue2 ! ffmpegcolorspace ! fbdevsink sync=0

*the video could correct playback ,but the audio is great lagged. *
and there is a error report:
GST_DEBUG=1 gst-launch filesrc location=/tmp/MPEG-1.mpg
 ! mpegdemux name=t  !  mad ! queue2 !  audioconvert ! audioresample !
queue2 !
osssink sync=0 t. ! mpeg2dec ! queue2 ! ffmpegcolorspace ! fbdevsink sync=0
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
0:00:14.091585000  1584    0xc43a8 ERROR                  oss
gstosshelper.c:246:gst_oss_helper_rate_probe_check: Driver bug recognized
(driver does not round rates correctly).  Please file a bug report.
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstAudioSinkClock

besides , when i use pipeline like this :
gst-launch filesrc location=/tmp/MPEG-1.mpg ! mpegdemux ! queue ! mad !
audioconvert ! audioresample ! osssink
it is reported:
WARNING: erroneous pipeline: could not link queue0 to mad0


Regards!
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