[FFmpeg-trac] #8937(undetermined:new): Incorrect color when decoding h264 file

FFmpeg trac at avcodec.org
Sat Oct 17 07:13:52 EEST 2020

#8937: Incorrect color when decoding h264 file
             Reporter:  iss          |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by iss):

 Replying to [comment:1 cehoyos]:
 > It appears to me that `ffplay` shows wrong colours but `ffmpeg` creates
 a correct output: Why do you think the `expected_result.png` file is
 correct / how did you produce it?

 I think that expected result is correct, because it shows correct in most
 players I tested (web browser, VLC, ffplay, even windows thumbnail looks
 like `expected_result.png`)

 Unfortunately I can't tell how the file was created, it was provided as
 sample for bug report - see https://developer.blender.org/T81307

 Perhaps not quite useful information is, that I have converted `pFrame`
 buffer data to RGB (I did this manually for 2 pixels) and the darker color
 was different to either of those results. There is good chance I did not
 do this correctly though, I am not used to other pixel formats than our

 This was my sample for darker pixel:

 And lighter pixel:

 I used this util to convert values

Ticket URL: <https://trac.ffmpeg.org/ticket/8937#comment:2>
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