Body: <p>Converting an existing clean 8k Quicktime Prores 444 file in FFmpeg yields banding.  It's a lenflare with a completely smooth gradient from center out to edge of frame (no alpha).  If I use AE2020 to convert it to Prores 444, the new file is clean without banding.  Am I doing something wrong?  Here is the command string:</p>
  <p>ffmpeg.exe -i file_8k.mov -map_metadata -1 -c:v prores_ks -profile:v 4 -pix_fmt yuv444p10le -color_primaries 1 -color_trc 1 -colorspace 1 -color_range 2 -y file_6k.mov</p>
  <p>In this case I'm converting it down to 6k, however other resolutions show the same problem, plus even converting to the same res.</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-29T06:53:33.853Z
Comments.Text: Sorry didn't include my rescale code: -filter:v "scale=5760:-1" however I'm presuming this has nothing to do with the problem.
Comments.UserDisplayName: brian dm
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-29T11:46:40.903Z
Comments.Text: Share full log.
Comments.UserDisplayName: Gyan
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-01-30T23:09:42.920Z
Comments.Text: @Gyan let me know if this qualifies as a log:  https://finalight.com/maindir/webpages/ffmpeg_batch.txt
Comments.UserDisplayName: brian dm
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-02-03T00:07:40.350Z
Comments.Text: Have you tried `-c:v prores` rather than `prores_ks` I know there were some bugs with banding a while ago with prores_ks.
Comments.UserDisplayName: stib
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2022-07-22T04:56:54.990Z
Comments.Text: Will give that a try.  Sorry, long time reply.
Comments.UserDisplayName: brian dm
Tags: <ffmpeg><prores>
Title: ffmpeg prores 4444 banding
UserDisplayName: brian dm
ThreadText: # ffmpeg prores 4444 banding
  
  (Asked by: username_0 on 2021-01-29)
  
  Converting an existing clean 8k Quicktime Prores 444 file in FFmpeg yields banding. It's a lenflare with a completely smooth gradient from center out to edge of frame (no alpha). If I use AE2020 to convert it to Prores 444, the new file is clean without banding. Am I doing something wrong? Here is the command string:
  
  ffmpeg.exe -i file\_8k.mov -map\_metadata -1 -c:v prores\_ks -profile:v 4 -pix\_fmt yuv444p10le -color\_primaries 1 -color\_trc 1 -colorspace 1 -color\_range 2 -y file\_6k.mov
  
  In this case I'm converting it down to 6k, however other resolutions show the same problem, plus even converting to the same res.
  
  **Tags:** ffmpeg, prores
  
  > **Comments:**
  > **username_0**: Sorry didn't include my rescale code: -filter:v "scale=5760:-1" however I'm presuming this has nothing to do with the problem.  
  > **username_1**: Share full log.  
  > **username_0**: @username_1 let me know if this qualifies as a log:  https://finalight.com/maindir/webpages/ffmpeg_batch.txt  
  > **username_2**: Have you tried `-c:v prores` rather than `prores_ks` I know there were some bugs with banding a while ago with prores_ks.  
  > **username_0**: Will give that a try.  Sorry, long time reply.  
  
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  ## 0 answers
  
  