[MPlayer-users] UDP -udp-slave video sync

Reimar Döffinger Reimar.Doeffinger at gmx.de
Wed Jun 8 21:07:26 CEST 2011

On Wed, Jun 08, 2011 at 02:40:57PM +0100, rob at goto10.org wrote:
> ok great thank you! - i applied the patch and now it works as
> expected

Unfortunately I couldn't see the patch. However the behaviour
was due to a stupid bug I introduced, and that happened because
with vsync enabled the video I tested actually did run at about
correct speed so the behaviour wasn't as bad as what you experienced.
Assuming it really works this time, the change in SVN should have
the advantage that the slave instances will start playing independently
after 30 seconds.

> - the only thing i have noticed is that the audio and video
> go out of sync on the slave instance -  its as if the udp packets
> tell the video which frame it should be playing but the audio doesnt
> jump to keep up

Well, MPlayer never ever adjusts audio playback speed so it can't
keep sync in this case.

> (i know if i were doing a video wall then you could just use the
> audio from one source - but this is not what i am doing)

Might help to say what you are doing. You can certainly just
set up an audio server and transmit the audio to the slaves via
network, independent of the MPlayer slaves.

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