[FFmpeg-user] is ljpeg jpeg 2000?

[Dave Rice]

On May 30, 2012, at 4:04 PM, Roger Pack wrote:

> Anybody know if ffmpeg's ljpeg video codec "is" an implementation of
> jpeg 2000, or is it something different/it's own thing?

These are different:
ljpeg [1], lossless jpeg, is an addition to the jpeg standard.
jpeg2000 [2] was developed much later and may be either lossy or lossless.

[1] http://en.wikipedia.org/wiki/Lossless_JPEG
[2] http://en.wikipedia.org/wiki/Jpeg2000

Dave Rice