jpeg2000 conversion?

[ben_franklin]

I have a jpeg2000 encoded movie that's about 280 gigs. I'm not really sure if its 2k or 4k. What is a good way to get it over to h.264?

[Guest]

How did you get a movie in jpeg2000?

[ben_franklin]

A client brought it to me. It was apparently formatted for some high end media server called a JMN3000.

[Guest]

http://www.openjpeg.org/

[MfA]

With 4K OpenJPEG isn't very practical (blows up data by ~30x). Maybe Mainconcept's DirectShow decoder?

[Leak]

With 4K OpenJPEG isn't very practical (blows up data by ~30x). Maybe Mainconcept's DirectShow decoder?
Since OpenJPEG is a library shouldn't it be possible to write a small program that just dumps the decoded images to stdout so they can be piped directly into x264 instead of writing them to disk?

[J_Darnley]

Since OpenJPEG is a library shouldn't it be possible to write a small program that just dumps the decoded images to stdout so they can be piped directly into x264 instead of writing them to disk?
Doesn't ffmpeg already do this?

[Leak]

Doesn't ffmpeg already do this?
Now that you mention it - it sure looks that way (http://ffmpeg.org/general.html#SEC5) (using libopenjpg).