On Sat, Feb 3, 2024 at 8:21 PM James Almer <jamr...@gmail.com> wrote:
> On 2/3/2024 9:17 AM, Nuo Mi wrote: > > On Sat, Feb 3, 2024 at 7:54 PM James Almer <jamr...@gmail.com> wrote: > > > >> On 2/3/2024 7:34 AM, Nuo Mi wrote: > >>> how to reproduce: > >>> wget https://media.xiph.org/video/derf/y4m/students_cif.y4m > >>> vvencapp --input students_cif.y4m --preset faster --output students.266 > >>> MP4Box -add students.266:fps=30000/1001:par=12:11 -new students.mp4 > >> > >> Can't you do this with ffmpeg? mp4 muxing support was added recently, > >> and we have a parser to find frame boundaries from raw bitstreams. > >> > >> Yes, we can > > ffmpeg -i students.266 -c:v copy students.mp4 > > But the reporter used the mp4box > > see: https://github.com/ffvvc/FFmpeg/issues/190#issuecomment-1924169765 > > That's ok, just wanted to know why not use ffmpeg for this. If it > couldn't remux the file, then that'd be something we should fix. > Ts demux has an issue for both HEVC and VVC. If you use ffplay on a TS file, you will see corrupted frames after a seek. The main reason is that the demuxer does not send the key frame after a seek; instead, it sends many frames before the key frame. Not sure if it's a feature or a bug in the demuxer you can reproduce it with wget https://s3.amazonaws.com/x265.org/video/Tears_400_x265.mp4 && ffmpeg -i Tears_400_x265.mp4 -c:v copy tos.ts ffplay tos.ts > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
