[FFmpeg-trac] #2967(avcodec:new): mjpeg enc: ljpeg output is incompatible with other programs

FFmpeg trac at avcodec.org
Wed Oct 29 15:38:01 CET 2014

#2967: mjpeg enc: ljpeg output is incompatible with other programs
             Reporter:  ami_stuff   |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  ljpeg       |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |

Comment (by maweber):

 no. the container DCM is not supported by ffmpeg.

 .dcm is the container for a range of specs defined by the DICOM standard.

 As far as I understood, it is an exchange format used by medical people.
 it defines a lot of client/patient meta stuff inside the container.

 But it seems that they early standardized ljpeg (among others) for their
 Thats why you find mostly DICOM related converters if you search for
 ljpeg, i guess.
 My aim was not a DCM container, but to get directly from ljpeg or jpeg-LS
 to something like PPM, which GDCM claims.

 So basically, for your understanding, I was producing ljpeg with ffmpeg,
 saved bandwidth, and wanted to unpack it on another machine to PPM, for
 easy processing. I'm processing 160k+ pictures, so I was looking to have
 something small, yet lossless.

 have a good day

Ticket URL: <https://trac.ffmpeg.org/ticket/2967#comment:13>
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