[FFmpeg-trac] #214(avcodec:open): 1bpp interlaced png (without filter) decodes incorrectly

FFmpeg trac at avcodec.org
Wed May 18 12:54:52 CEST 2011

#214: 1bpp interlaced png (without filter) decodes incorrectly
Reporter:  ami_stuff   |       Owner:
    Type:  defect      |      Status:  open
Priority:  normal      |   Component:  avcodec
 Version:  git-master  |  Resolution:
Keywords:              |  Blocked By:
Blocking:              |  Reproduced:  1
Analyzed:  0           |

Comment (by saste):

 Replying to [comment:4 ami_stuff]:
 > There are two problems:
 > ffmpeg converts the file incorrectly
 > and
 > ffplay displays the file incorrectly (add black line) because of libsdl
 > but the real problem here is that ffmpeg can't convert correctly png
 interlaced files.

 Indeed, I was misled by the libsdl bug, I confirm the bug.

 A complete review of the png decoder would be nice, also for adding
 support of the missing features but I don't think I'll have time for this
 in the next future.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/214#comment:5>
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