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
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