[MPlayer-users] a/v sync issue while playing separate video and audio webm files

[Reimar Döffinger]

On Fri, Jun 05, 2015 at 01:42:21PM +0200, Rasz wrote:
> On 6/5/15, Rasz <citizenr at gmail.com> wrote:
> > --------------------------------------------
> 
> actually streaming has nothing to do with it, same effect while
> playing local files (same as in post above, but downloaded to disk):
> D:\_learning>C:\Users\bofh\AppData\Roaming\smplayer\mplayer\mplayer
> "The Witcher 3 Gameplay Walkthrough Part 25 [1080p HD] Witcher 3 Wild
> Hunt - No Commentary-M3IgHiWq5x4.webm1" -audiofile "The Witcher 3
> Gameplay Walkthrough Part 25 [1080p HD] Witcher 3 Wild Hunt - No
> Commentary-M3IgHiWq5x4.webm" -mc 10
> 
> There are two  problems:
> 1 after seeking mplayer knows perfectly well where in the audio and
> where in the video file it is (A:  71.0 V:  64.0 A-V:  7.013), despite
> that it doesnt bother doing anything about it and simply starts
> playing at mismatched indexes
> 2 mplayer corrects maybe ~100ms of desync per second instead of
> snapping into place

Well, "snapping" isn't really possible for various reasons (decode
speed, MPlayer design issues, ...).
But the -mc option specifies the maximum allowed adjustment,
so just try increasing that significantly for this use-case.