I was looking into loslesscut issue tracker and found two related issues: https://github.com/mifi/lossless-cut/issues/126 " Implement "smart cut"
this branches into avcut and its explanation, and into https://github.com/mifi/lossless-cut/issues/1216 "How to seek to and cut from a frame in ffmpeg?" this discussion has interesting tip on how to convince ffmpeg to cut more accurately on keyframes: ===== The only good solution and reproducible that I found it to set the -t to 2 frames before the keyframe wanted ==== So I wonder if *this* will work with Mark's files? I tried ffmpeg's ss and to options on mp4 file and get around 3 milliseconds of difference between cut file and distance I tried to express in milliseconds argument for " -to" switch from ss 0.0. For finding keyframes I was using mpv's default seeking behavior {keyboard cursor arrows will jump to keyframe} with osd-fractions option set in mpv.conf so it displays milliseconds in both terminal output and OSD but it was with v 4.4.4 of ffmpeg, so may be not reproducible on new ffmpeg versions. I want to thank Mark for his persistence in chasing this issue because it turned out many open- and closed-source projects use ffmpeg/libav* for framecut functionality, so fixing it at source is important. _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
