[FFmpeg-user] Different MD5 hashes for identical tracks

[Reindl Harald]

Am 30.06.20 um 18:31 schrieb raistlin.mlists at yandex.ru:
> Hello Ffmpeg-user,
> 
> There are 2 sample m2ts files (about 84 MB each):
> https://mir.cr/0Y8ROTYT (1)
> https://mir.cr/RFI1MNOM (2)
> 
> Stream a:5 in (1) and stream a:4 in (2) are identical (being binary
> compared). Though ffmpeg reports they have different MD5 hashes:
> 
> ffmpeg -loglevel 4 -i 00001.m2ts -map 0:a:5 -codec copy -f md5 -
> MD5=cee9775826b81d395c7d012e69309270
> 
> ffmpeg -loglevel 4 -i 00000.m2ts  -map 0:a:4 -codec copy -f md5 -
> MD5=32ccb6d7af46bfdd2100cd68c7622171
> 
> MD5 hashes for these streams being decoded (without '-codec copy') are
> also different.
> 
> How could it be

most files have timestamps inside