Save Video Produces Inaccurate Colors

[KiyoshiKuro]

• Chainner version: 0.24.1
• OS: Windows 11

Description

Colors in videos saved from Chainner are inaccurate, regardless of whether an upscale model is used or not. The issue persists across different formats and encoders. However, if I save the output as images instead of a video, the colors are correct.

I've tried a clean install of Chainner and extracting PNGs of the video frames before saving them as a video, but the colors remain incorrect. This happens with any video I've tested.

In previous versions of Chainner, when it used the Video Frame Iterator, I was able to upscale videos without color issues.

In the example, the greens are darker, and the reds are desaturated.

Logs main.log

[pokepress]

This is purely a hunch, but is is it possible it's an issue with FFMPEG, or the version being used by the software?

[KiyoshiKuro]

Using my own ffmpeg with the command "ffmpeg -i input.mkv -c:v ffv1 output.mkv" produces a video with accurate colors. My own encode is also almost double the size of chainner's. I tried replacing chainner's ffmpeg.exe and ffprobe.exe with the mine, and chainner still produces inaccurate colors. I've attached mediainfo for mine and chainner's encodes. chainnerffmpeg.txt myffmpeg.txt

[NSQY]

This is caused by a color matrix mismatch when converting to or from RGB. It is often merely a metadata error.

[KiyoshiKuro]

Thanks for your response. I'm not entirely sure what to do with that info. I tried editing the save video parameters to include "-colorspace bt709 -color_primaries bt709 -color_trc bt709" and it produced the same inaccurate colors as before, but the mediainfo does look closer to my own encode... chainnerffmpeg2.txt