[MPlayer-users] udp sync over wifi

[johannes amorosa]

Maybe a bit offtopic. I had a 5 way video setup with udp sync  and used
powerline networking because I don't  wanted to use Ethernet (extra cable).
Wifi wasn't available because of interference.
Maybe that's an alternative for you.
Cheers
Johannes
On Jul 21, 2012 12:24 PM, "Reimar Döffinger" <Reimar.Doeffinger at gmx.de>
wrote:

> On Fri, Jul 20, 2012 at 01:06:52PM +0000, Richard Markiewicz wrote:
> > Ron Johnson <ron.l.johnson <at> cox.net> writes:
> >
> > >
> > > You can test it by plugging the laptop into the wired net.
> > >
> >
> > Yes, over wired net it works great. So the issue is clearly wireless.
> >
> > I guess my question is: is there something I can tune/change to make
> this work
> > better over wireless? Is the specific bottleneck bandwidth, latency, or
> both?
>
> You could try to capture the UDP packages at the client and try to find
> anything suspicious.
> I came only up with one guess (since you claim the latency is fairly
> ok): Somehow the UDP packets arrive in a different order than they were
> sent. I believe the code cannot handle that currently.
> Currently the only relevant tunable is udp-seek-threshold, but it does
> not apply when the timestamps jump backwards.
> If the issue is what I guessed, I think the fix is to add a counter
> field to the timestamp data sent and ignore outdated ones.
> Or something like that.
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