[FFmpeg-trac] #8424(undetermined:new): Colour changes if scale height

FFmpeg trac at avcodec.org
Thu Dec 12 17:45:31 EET 2019

#8424: Colour changes if scale height
             Reporter:  Bassquake    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by pdr0):

 This actual has nothing to do with ffmpeg  ;

 It's the software you are using for playback, and how it converts to RGB
 for display. Some players use the criteria of "height" to determine if
 something is "HD" and use Rec709. So they use Rec709 when height >576 ,
 Rec601 when height <=576. Essentially it's the "HD" vs. "SD" cutoff. But
 the handling can be different in other software, video editors. There are
 other factors, such as the format used, metadata flags which may affect
 how it's handled. For example, huffyuv will often get 601 treatment in
 some editors, even when 720 or 1080 height.

Ticket URL: <https://trac.ffmpeg.org/ticket/8424#comment:7>
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