[FFmpeg-trac] #2753(avcodec:open): MPNG artefacts

FFmpeg trac at avcodec.org
Wed Aug 20 22:49:47 CEST 2014

#2753: MPNG artefacts
             Reporter:  cehoyos     |                    Owner:
                 Type:  defect      |                   Status:  open
             Priority:  normal      |                Component:  avcodec
              Version:  git-master  |               Resolution:
             Keywords:  png         |               Blocked By:
             Blocking:              |  Reproduced by developer:  1
Analyzed by developer:  0           |

Comment (by kurosu):

 I think the ticket is invalid: the errors are block-like (I don't think
 incorrect decoding of pngs can lead to this) and were probably in the
 source of the mpng file.

 One can extract the pngs (I'm actually impressed it works):
 ./ffmpeg -i mpng.avi -vcodec copy -an out%03d.png

 And then the pngs can be decoded by any application, with the artifacts.

Ticket URL: <https://trac.ffmpeg.org/ticket/2753#comment:3>
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