[gst-devel] Queues

Wim Taymans wim.taymans at gmail.com
Wed Jun 3 15:35:54 CEST 2009

On Wed, 2009-06-03 at 11:17 +0200, ldac wrote:
>    Hi all,
> I am launching the following pipe to record audio and video into an
> AVI file. When I stop the pipeline and I play the file, audio goes too
> fast and video has some interruptions and also goes faster. But if I
> run "half" pipeline just with the audio goes fine, and the other half
> with the video too ...
> gst-launch-0.10 v4lsrc capture-width=720 capture-height=576 fps-n=25
> fps-d=1 ! \
>    'video/x-raw-yuv,width=720,heigh=576,framerate=(fraction)25/1' ! \
>    videoencoder width=720 height=576 codec-type=std_avc qp=20 !
> h264parse ! mux.\
>    alsasrc ! ffenc_mp2 ! mux. \
>    avimux name=mux ! filesink location=test.avi
>     I guess that "queues" can fix the problem, but I have tried
> placing them in some positions, but without improvement. Could someone
> tell me how/where/why should I use/place the "queues"??? Is there
> something else wrong "conceptually" talking? Which clock are both
> branches (video and audio) using? Is a muxer problem?

You are probably not shutting down the pipeline cleanly (you need to
send EOS down the pipeline before shutting it down so that the muxer can
write the headers correctly).

Newer gst-launch versions also have the -e option to perform controlled

>     Thanks.
>     All the best.
>     LD.
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