[FFmpeg-user] The newest ffmpeg split video very slowly with async 2 or 1

[Carl Eugen Hoyos]

Tony Song <ssaoying <at> gmail.com> writes:

> > Does it work without -async 2 ?
> > (What is -async 2 supposed to do?)

> Audio is out of sync in the output files without -async 2.

Please provide the input sample.

Thank you, Carl Eugen