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+--- Thread: Preserving 4:1:1 colorspace from DV video source (/thread-3673.html)
Preserving 4:1:1 colorspace from DV video source - Perseverant - 11.04.2024
Hey Selur,
I have some DV video that I'm deinterlacing and encoding, and I want to make sure I don't lose color information by using the wrong colorspace. I read elsewhere that 4:1:1 and 4:2:0 are basically storing the same information in different ways. Is that your understanding?
If using 4:2:0 is inappropriate for 4:1:1 source video, I'd appreciate any guidance. I'm encoding in x265.
Thank you in advance!
RE: Preserving 4:1:1 colorspace from DV video source - Selur - 11.04.2024
In the case of 4:1:1, for every 4 luma samples horizontally, there is only one chroma sample (either U or V), and for every luma sample vertically, there is one chroma sample. In contrast, in 4:2:0, for every 4 luma samples horizontally, there are two chroma samples, and for every 2 luma samples vertically, there are two chroma samples.
=> they are not storing the same information.
4:2:0 has more chroma information compared to 4:1:1, where as 4:1:1 has more luma information.
That said, usually the difference it not visibly noticeable.
Cu Selur
RE: Preserving 4:1:1 colorspace from DV video source - Perseverant - 11.04.2024
Would 4:2:2 capture the extra 4:1:1 information without altering the video in a negative way, or would some undesirable conversion process happen? I understand filesize might be a bit larger, but if 4:2:2 will retain the information I'd lose by going to 4:2:0, then I'd rather go with 4:2:2.
RE: Preserving 4:1:1 colorspace from DV video source - Selur - 12.04.2024
Yes, you could use 4:2:2 and enable 'Convert to target color space after source filter' and if all of the filters you use support that color space you could lessen potential losses.
Cu Selur
RE: Preserving 4:1:1 colorspace from DV video source - Perseverant - 14.04.2024
I and my family videos thank you
