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rigaya / NVEnc

NVENCによる高速エンコードの性能実験
https://rigaya34589.blog.fc2.com/blog-category-17.html
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HDR2HDR #413

Open wsx958191 opened 2 years ago

wsx958191 commented 2 years ago

hi： How to support HDR coding ?

rigaya commented 2 years ago

I’m sorry but I’m not able to get what you mean.

Would you please provide more details and examples?

wsx958191 commented 2 years ago

Hello, maybe I didn't make it clear. I want to provide HDR video conversion from high bit rate to low bit rate, but I don't know whether it can be realized if the HDR content of the video should be maintained

ghost commented 2 years ago

Just don't change the colorspace or mastering data and you're fine. HDR can be reencoded to any bit rate you want, or resized and left as HDR. I've converted old SD 30fps 480i videos to 60fps 480p HDR10 w/ Dolby Vision and don't have any issues playing them back. It's much easier when your source is already HDR, I'm just giving an extreme example.

The only caveat is that if you want seeking to work well on TVs and devices with less memory you'll probably want to set a fixed GOP length that's relatively short.

If the video has HDR10+ metadata or Dolby Vision there are other things that need to be done to preserve those (unless NVEnc handles them automatically) that you'll have to google around for.