[FFmpeg-user] Keeping A/V sync during telecine

Carl Zwanzig cpz at tuunq.com
Sat Dec 30 21:24:53 EET 2017

On 12/30/2017 11:13 AM, Carl Eugen Hoyos wrote:
> 2017-12-29 22:03 GMT+01:00 Carl Zwanzig <cpz at tuunq.com>:
>> cpz at video-proc-0:/mnt/videofiles % ffmpeg -r ntsc-film -i INPUT.vob

> You cannot force an input frame-rate for variable frame-rate files,
> or to say it differently, you can but it must lead to av-desync.

Removing "-r ntsc-film" and setting the fps in the vf chain seems to produce 
proper sync in my limited test. I'll process some other content today and 
see how they turn out.

> In general, you should never force an input frame-rate unless
> you have a particular reason and know what you are doing.

Which I manifestly do not :).

Many thanks (again),


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