Le 2017-11-30 11:52, Kieran O Leary a écrit :
I know nothing about these formats really, but using md5 for this kind of comparison is sometimes flawed. With some formats, pieces of metadata like 'encoded date', or perhaps a unique ID can be written. So each time you run the same ffmpeg command, you will get a different whole file MD5 value as a few small bits will indeed be different.
Oh, didn't thought thought of that. Makes sense.
I mimicked your command and produced opus and ogg outputs from the same input. Using mediainfo's trace feature, it looks to me like both are pretty much identical, they just have different values for 'stream serial number' and 'page checksum'. It looks to me as though both files are pretty much identical otherwise. Here's the output of both trace reports: https://gist.github.com/kieranjol/45edc4871270ce6110d256590e71e229 I used mediainfo --Details=1 test.ogg mediainfo --Details=1 test.opus to get those outputs.
Well, I did first try with the graphical front-end of mediainfo, but the version I used somehow didn't like the ".opus", and didn't show much Comments. I guess command-line is always more reliable :)
Thanks ! N _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
