[FFmpeg-trac] #10070(undetermined:closed): apng enc artefacts

[FFmpeg]

#10070: apng enc artefacts
-------------------------------------+-------------------------------------
             Reporter:  ami_stuff    |                    Owner:  (none)
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by ami_stuff):

 I was talking about a possible bug in apng decoder, not srgc...

 When one convert directly "gold2.avi" file to "out.avi", there won't be
 any visible artefacts/black rectangles while playing the output "out.avi"
 file with ffplay:


 {{{
 ffmpeg -i gold2.avi out.avi
 }}}

 {{{
 ffplay out.avi
 }}}


 but when one do conversion like this:

 {{{
 ffmpeg -i gold2.avi out.apng
 }}}

 {{{
 ffmpeg -i out.apng out.avi
 }}}

 {{{
 ffplay out.avi
 }}}

 artefacts/black rectangles will be visible while playing the output
 "out.avi" file with ffplay

 How is this not a bug?
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10070#comment:4>
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