xvidenc + libmp3lame out of sync...

[Wim Taymans]

On 05/16/2012 05:10 PM, andrea wrote:
> Hi,
>
> I'm using the following command line (with reference to some shell
> variables) to download streams from Italian broadcast RAI.TV:
>
> gst-launch-0.10 rtspsrc location="$URL" \
>    ! decodebin2 name=decoder \
>    decoder. \
>    ! queue \
>    ! xvidenc bitrate=$VBT \
>    ! mux. \
>    decoder. \
>    ! audioconvert \
>    ! audioresample \
>    ! audio/x-raw-int, rate=44100 \
>    ! lamemp3enc target=bitrate cbr=true bitrate=128 \
>    ! queue \
>    ! mux. \
>    avimux name=mux \
>    ! filesink location="$DEST"
>
> It usually works, but sometimes the resulting videos go out of sync
> after some minutes. Some other times audio and video are slightly out of
> sync constantly throughout the show.

rtspsrc buffer-mode=none might make things better. You might also have 
better results with
qtmux because it can preserve timestamps better.

Wim
>
> I'm not a developer, I simply try to use gstreamer for very simple
> applications. I wander if the above pipeline misses something that is
> needed to guarantee the sync.
>
> Here are some example for $URL:
>
> rtsp://wms2.rai.it/raitrecdn/raitre/ulisse/Ulisse_PUNTATE/156723.wmv
> rtsp://wms2.rai.it/raitrecdn/raitre/ulisse/Ulisse_PUNTATE/433069.wmv
>
> Any hint would be very much appreciated.
>
> Best regards.