[Ffmpeg-devel] JPEG-LS issues

[Roberto Togni]

On Sat, 18 Feb 2006 17:58:32 +0200
Kostya <kostya.forjunk at gmail.com> wrote:

> There are two issues to deal with:
> 1) JPEG-LS also has an encoder, but that is not mentioned anywhere.
> 2) Maybe we should assign FOURCC to JPEG-LS encoder (Justin Ruggles
> suggested "MJLS") and setup jpegls_encoder and mjpeg_decoder to
> handle it. I don't know how to do the last thing. Suggestions?

The only lossless jpeg avi i have 
http://equinox.campus.ltu.se/samples/V-codecs/MJPEGs/pegasus_mjpeg/miss_congeniality_pegasus_ljpg.avi
have fourcc 'ljpg' and biCompression 'JPGL'.

Type: vids   FCC: ljpg (67706A6C)
Flags: 0
Priority: 0   Language: 0
InitialFrames: 0
Rate: 24000/1001 = 23.976
Start: 0   Len: 20
Suggested BufferSize: 189708
Quality 10000
Sample size: 0
==========================
Found 'bih', 40 bytes of 40
======= VIDEO Format ======
  biSize 40
  biWidth 640
  biHeight 352
  biPlanes 1
  biBitCount 24
  biCompression 1279742026='JPGL'
  biSizeImage 675840
===========================

Ciao,
 Roberto