[FFmpeg-user] How to drop every Nth frame?

[Pavel Koshevoy]

On 9/28/2013 2:01 AM, Andrey Aleksandrovich wrote:
>>>> What makes you think that atempo limits the scale factor precision
>>>> to only 4 significant digits? Have you tried providing a more precise scale factor?
> Experience way.
> 0.99667 and 0.997 = +7.3 sec desync
> 0.99834 and 0.99824 = -3.3 sec desync
>

How old is your build of ffmpeg?  There was an atempo sync bug 
(http://trac.ffmpeg.org/ticket/2484), but that was fixed 5 months ago.  
If you are able to reproduce a sync issue with current ffmpeg please 
open a trac ticket.

Pavel.