sooty234 266 Posted November 23, 2020 Share Posted November 23, 2020 I was basing my supposition on this https://www.rtings.com/tv/learn/chroma-subsampling Link to comment Share on other sites More sharing options...
pwhodges 1523 Posted November 23, 2020 Share Posted November 23, 2020 1 hour ago, softworkz said: Comparing 4:2:2 to 4:2:0 doesn't add more detail. It rather adds more fine-grained color values which makes zero sense for cartoons or anime.... Though, I don't have any plausible idea why they might be doing like that. Well, I don't know quite how "10-bit" relates to these values, but the reason it (10-bit) is widely used in anime is precisely for the greater colour resolution. When you have the plain clean colours of anime used in a gradient, banding quickly becomes obvious and offensive, and using 10-bit reduces this problem significantly. Paul Link to comment Share on other sites More sharing options...
softworkz 3326 Posted November 23, 2020 Share Posted November 23, 2020 Just now, pwhodges said: Well, I don't know quite how "10-bit" relates to these values, but the reason it (10-bit) is widely used in anime is precisely for the greater colour resolution. When you have the plain clean colours of anime used in a gradient, banding quickly becomes obvious and offensive, and using 10-bit reduces this problem significantly. Yes, you are correct in that matter. When I said "fine-grained" I didn't mean a larger number of color values (as can be achieved with 10bit vs 8bit), but instead I meant more fine-grained colors in a spatial way. Those image formats like yuv420, 422 or 444 are about chroma-subsampling, which means for example in case of yuv420, that the luminance values are stored at full image resolution while the chrominance values are stored at a smaller resolution, etc etc. (I'm a bit tired today...Wikipedia is your friend) Link to comment Share on other sites More sharing options...
pwhodges 1523 Posted November 23, 2020 Share Posted November 23, 2020 Gotcha - thanks. Paul Link to comment Share on other sites More sharing options...
sooty234 266 Posted November 23, 2020 Share Posted November 23, 2020 That link I provided, explains it very well. And I agree with softworkz. You wouldn't notice a difference between 4:2:0 and 4:2:2, but I think there are many people in the world, that believe if they have more, they'll notice a difference. I expect the guy that re-encoded the video believes that. 2 Link to comment Share on other sites More sharing options...
sooty234 266 Posted November 23, 2020 Share Posted November 23, 2020 So here's a question. Is it transcoding because it doesn't support the pixel format or the codec variant? Both? Link to comment Share on other sites More sharing options...
softworkz 3326 Posted November 24, 2020 Share Posted November 24, 2020 21 hours ago, sooty234 said: That link I provided, explains it very well. And I agree with softworkz. You wouldn't notice a difference between 4:2:0 and 4:2:2, but I think there are many people in the world, that believe if they have more, they'll notice a difference. I expect the guy that re-encoded the video believes that. I totally missed that link that you had posted. Yes, it's a very good (and short) explanation! 1 Link to comment Share on other sites More sharing options...
softworkz 3326 Posted November 24, 2020 Share Posted November 24, 2020 21 hours ago, sooty234 said: So here's a question. Is it transcoding because it doesn't support the pixel format or the codec variant? Both? I can't tell without seeing an ffmpeg log.. 1 Link to comment Share on other sites More sharing options...
pwhodges 1523 Posted January 12, 2023 Share Posted January 12, 2023 I have just come across RExt transcoding (and made a new thread having forgotten this one <blush>). The file concerned is indeed 4:2:2, and the ffmpeg logs @softworkz in the attached file relate to this file. Paul Bungou Logs.7z Link to comment Share on other sites More sharing options...
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