[FFmpeg-user] Can ffmpeg convert these mp4 to that mp4?

[Reindl Harald]

Am 30.10.19 um 11:14 schrieb Carl Eugen Hoyos:
>> Am 30.10.2019 um 10:48 schrieb arthur brogard via ffmpeg-user <ffmpeg-user at ffmpeg.org>:
>>
>> ffmpeg -y -r 25 -i infile.mp4 outfile.mp4
> 
> This will almost certainly lead to A/V desync (if not, then only because of a bug).
why?