Hi Oliver, Thanks very much for your reply. I want to create mj2 files to test an mj2 reader. So, what I really need are some mj2 test images - I have only been able to find one so far on the internet. If you know where I can find more, that would also be great.
Thanks, Aaron On Monday, 29 July 2024 at 15:40, Oliver Fromme <oli...@fromme.com> wrote: > > > Aaron Boxer via ffmpeg-user wrote: > > > I am able to play back mj2 clips with ffmpeg; can I also create mj2 files > > > by converting from say mp4 ? > > > No, unfortunately that's not supported. > Excerpt from the output of ``ffmpeg -formats'': > > D mov,mp4,m4a,3gp,3g2,mj2 QuickTime / MOV > > The "D" in the first column means that FFmpeg can only read these > files, but not write them. Basically, .mj2 files are just MP4 > containers (or Quicktime) with frames that are JPEG-2000 images. > > There are also "raw" MJPEG2k files, but FFmpeg cannot write them > either (this is a raw stream of JPEG2k images): > > D mjpeg_2000 raw MJPEG 2000 video > > Just out of curiosity, why do you need to create MJPEG2k files? > In general, I recommend against doing that, unless you need it > for compatibility with a certain piece of hardware or software > that isn’t able to handle anything else. > > Best regards > -- Oliver > _______________________________________________ > 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". _______________________________________________ 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".
