Inconsistent Colour Reproduction in Swiftin and Jellyfin Mobile iOS Clients

[TheDreadPirate]

I have tried it just now, on iOS in both Jellyfin and Swiftin, direct play is a hit or a miss for the same file! It plays in direct play sometimes and sometimes it doesn't, if I enable force direct Play, I get a black screen with a slash over the play icon. Is there a way to make it consistent direct play.

If you forced direct play and the screen is black that means the device doesn't support the video.  Either the codec or HDR type.  Can you show me the media info for the file?

   

And the config I mentioned earlier (see quote below).  If your video is a super high bit rate it is possible that the "auto" setting, which attempts to detect your network speed, made an incorrect determination and is transcoding due to it thinking your network isn't fast enough Did you manually select a high maximum bit rate?

If it is sometimes direct playing and sometimes not, make sure that you've set the "maximum bit rate" to the highest manual value instead of auto.  Sometimes the auto detection will return an incorrect and low value, resulting in unnecessary transcoding.