[FFmpeg-devel] [PATCH] avformat/mp3dec: set default disposition

[Gyan]

On 24-08-2019 07:07 PM, Nicolas George wrote:
> Gyan (12019-08-24):
>> The ticket reports a change in auto-mapping behaviour. Manual mapping is a
>> workaround which I already provided at trac but it doesn't correct the
>> regression which should be addressed since I've confirmed that auto-mapping
>> is affected for instances beyond that in the ticket e.g.   ffmpeg -i avi -i
>> mp4 outfile where both files have streams with identical parameters.
> Is it really a regression? I mean: was the old behaviour really better
> in many cases?
I see default disposition set by only three demuxers among the many 
dozens lavf has. Given the weight to it now, lowest index is no longer 
respected for otherwise near-identical streams. For audio it looks to be 
completely broken, e.g. a stereo stream can be chosen over an 8-channel 
stream.

Gyan