[pulseaudio-discuss] [RAOP] [PATCH] Fix audio synchronisation

Colin Leroy colin at colino.net
Sat Jul 22 12:53:15 UTC 2017


I think I've figured out how to cleanly synchronise audio and video
with RAOP with relying on my empirical "shifting audio 2300ms in
mplayer works".

The attached patch adds 2000ms of latency (as spec'ed by Apple from
what I've found on the internet) plus the length of the last audio
packet sent to the initial latency calculation. This works great on my
computer. The added latency is 2352ms which is very close to my
empirical finding.

I'd love for others to test it with different hardware (mine's a Pioneer
N-30) and if it's deemed good, to have it merged upstream!

PS: here's a video showing the synchronisation (sorry, when slowed out
too much, you can't really hear the "bops" :
(At the beginning, sync isn't perfect, I suspect it's due to the
connecting etc.)
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