[FFmpeg-user] Creating Motion JPEG 2000 Images

[Aaron Boxer]

On Monday, 29 July 2024 at 18:58, Pierre-Anthony Lemieux <pal at sandflow.com> wrote:

> 
> 
> The kdu_v_compress tool at [1] can create MJ2 files.
> 
> [1] https://kakadusoftware.com/documentation-downloads/downloads/
> 

Perfect! 
Thanks,
Aaron


> On Mon, Jul 29, 2024 at 2:12 PM Aaron Boxer via ffmpeg-user
> ffmpeg-user at ffmpeg.org wrote:
> 
> > 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 oliver at 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 at ffmpeg.org
> > > https://ffmpeg.org/mailman/listinfo/ffmpeg-user
> > > 
> > > To unsubscribe, visit link above, or email
> > > ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".
> > > _______________________________________________
> > > ffmpeg-user mailing list
> > > ffmpeg-user at ffmpeg.org
> > > https://ffmpeg.org/mailman/listinfo/ffmpeg-user
> > 
> > To unsubscribe, visit link above, or email
> > ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".