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Transcoding Dolby Vision-- Intel Arc A770 #6672
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Originally created by @soultaco83 on GitHub (Jan 22, 2025).
Description of the bug
While transcoding Dolby Vision videos using my Intel Arc system. The movies tone mapping appear to not be working as the video comes out purple and green
Reproduction steps
Using an intel card. Transcode a movie that is using the Dolby vision format
What is the current bug behavior?
Dolby vision videos while transcoding turn purple and green
What is the expected correct behavior?
Correct coloring
Jellyfin Server version
Master
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5612d2187bSpecify unstable release number
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Specify the build version
2025012100
Environment
Jellyfin logs
FFmpeg logs
Client / Browser logs
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Relevant screenshots or videos
Additional information
FFmpeg.Transcode-2025-01-22_07-04-15_e98a70b9f14cf4954d998630256f0ff7_b6efad1a.log
FFmpeg.Transcode-2025-01-22_07-04-17_e98a70b9f14cf4954d998630256f0ff7_3580d761.log
log_20250122.log
@nyanmisaka commented on GitHub (Jan 22, 2025):
Dolby Vision Profile 5 is only used in HEVC/H265. For AV1, it MUST use Profile 10.
This means that the Dolby Vision metadata in your video is invalid and FFmpeg cannot recognize it correctly.
https://en.wikipedia.org/wiki/Dolby_Vision#Profiles
https://professionalsupport.dolby.com/s/article/What-is-Dolby-Vision-Profile?language=en_US
@gnattu commented on GitHub (Jan 22, 2025):
Plus, there is nothing official from Dolby in the public can do Profile 10 encoding so all av1 Dolby files may not be encoded correctly because the tools may not handle them right.