[FFmpeg-user] Different MD5 hashes for identical tracks

[raistlin.mlists at yandex.ru]

Hello Reindl,

>> 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

Are these timestamps removed by demuxing? As I wrote demuxed tracks
are byte-to-byte identical.

-- 
Best regards,
raistlin.mlists at yandex.ru