[FFmpeg-user] Is there a reason the default vsync for the mp4 muxer is not 2?

[Carl Eugen Hoyos]

2018-05-23 16:24 GMT+02:00, André Hänsel <andre at webkr.de>:
>>> I added -vsync 2 to the command line options and I got a file
>>> that has roughly the same number of frames as the input.
>
>> But it is - unfortunately! - an invalid file.
>
> Is there a ticket/additional info about what is/can be invalid in this file?

I don't remember atm, sorry, git blame may help you.

> With -enc_time_base -1 -vsync 2 my output files seem just fine.

Do you have access to an isom stream analyzer?
If not, this discussion won't be very fruitful, sorry;-(

Carl Eugen