[FFmpeg-user] Question about handling / unwanted changes of SAR in ffmpeg

[Uwe Freese]

Hello,
>> Instead, the better solution would then be to give the SAR to whatever
>> calculates the SAR to store at container level not as a double or int,
>> but as a "AVRational", which contains the "num" and "den" values (in
>> this case 64 and 45)?
> This is exactly what FFmpeg does (since forever).

Good. But then I totally don't understand why that 64:45 is not used and 
stored at mkv container level as well.

Regards,
Uwe