[FFmpeg-user] ffmpeg - avfoundation Audio stutters / sounds broken with screen capture [sample, config, output included]

[kevin]

On Sun, Apr 26, 2015 at 9:05 AM, Moritz Barsnick <barsnick at gmx.net> wrote:

> On Sun, Apr 26, 2015 at 06:56:18 -0700, kevin wrote:
>
> > Furthermore, as mentioned in my first email, with -i "0:0" [FaceTime
> > camera and mic] both audio and video is great. The problem is only
> > with -i "1:0".
>
> Just to confirm (though I know that's what "N:0" means): So you're
> using the same audio input in both cases?

Yes, I am using same audio in put in both cases the built in microphone,
and there are no other attached devices.



> > With -vn audio quality is great, no problem at all.
> Interesting. So it seems like a performance or sync problem, though I
> don't really see why. You might want to experiment whether a fast x264
> preset changes anything.


Yes it does sound like a sync / performance problem. I -preset fast doesn't
help also.