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Old 16th August 2023, 23:18   #1  |  Link
bokeron2020
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ffmpeg -bsf:v hevc_metadata... Any way to change Mastering Display Luminance?

Hi!!

I made an ugly and stupid mistake while encoding that ended up with 20 files which Mastering Display Luminance values are reversed. I mean, instead of Mediainfo showing:

Code:
Mastering display luminance       : min: 0.0000 cd/m2, max: 1000 cd/m2
it shows instead:

Code:
Mastering display luminance       : min: 1000.0000 cd/m2, max: 0 cd/m2

Apparentlyt there's no way to change that using ffmeg bitstream filter... but maybe there is? Or... is there any other way that can repair this without reencoding?

Thanks for any help you can provide.
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Old 17th August 2023, 00:44   #2  |  Link
quietvoid
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There are ffmpeg patches that add the capability to edit HDR metadata AFAIK..
I don't have them on hand.
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Old 17th August 2023, 01:09   #3  |  Link
bokeron2020
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Quote:
Originally Posted by quietvoid View Post
There are ffmpeg patches that add the capability to edit HDR metadata AFAIK..
I don't have them on hand.
Oh, thank you. Didn't know about that. I've done a quick search right now and I've found something apparently compiled for Nvida encoder... I downloaded and tried it but no luck.

I wonder why isn't this a capability already incorporated to the "mainstream" builds. Maybe some drawback doing this even if it was finally possible?

I better start re-encoding... just in case...
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