Speedup video extraction / Avoid ffmpeg video corruption #2
Description
Hello,
First of all, thanks for your efforts.
I have read the extraction steps, and it seems to be possible to extract the video directly from the USM files, using WannaCRI, which skips completely the parsing of the file.
Ripping all the files takes more or less the same time than to actually copy them.
Additionally, (at least in my decode, (ffmpeg version 6.1.1-full_build-www.gyan.dev)) when I was comparing the video quality, I saw that on the output file ffmpeg is skipping either frames or chunks, as videos are noticeably shorter. I reviewed it against the main theme (overt...) YouTube video, and it is quite noticeable.
Using WannaCRI however does introduce some quite noticeable artifacting on the decoded files, so maybe upstream would need some additional patch to avoid data corruption.
I will try to take a peek on it by myself, just wanted to let you know about that project as well.