Hi,

Il 04/11/25 14:50, Zhao Zhili ha scritto:
>> The specification says that if either the numerator or the
>> denominator is zero then the SAR is to be intended unspecified.
>> Internally ffmpeg represents an unspecified SAR as 0/1, while
>> fractions with a zero denominator are not handled properly;
> 
> Is there any known issue?

I observed this problem with a bunch of video files provided by game 
OddBallers when executed with Wine/Proton. There is some more backstory 
on my first submission of this patch last year:

   https://ffmpeg.org/pipermail/ffmpeg-devel/2024-July/331835.html

Thanks, Giovanni.