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Old 19th May 2020, 02:59   #10  |  Link
user58
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Join Date: May 2020
Posts: 6
Quote:
Originally Posted by Cary Knoop View Post
Hold on a second, VHS is theoretically 4:2:2 but actually effectively much less than that, you can sample with 444 but that would not do any good.
And may even make things worse if you want to deinterlace!
you might help me out with this question a little more ?

the most information that is around in the internet says that 4:4:4 is sampling all pixels

i might missinterpret those 2 informations :
1:
https://upload.wikimedia.org/wikiped...ing_ratios.svg
2:
https://www.youtube.com/watch?v=K458...=youtu.be&t=89

going below 4:4:4 (16) it calls out the old problem of compression
the want a smaller file size for example
then the internet useally tells a story what information is skipped
for example 4:2:2 (8)
only the half of pixels
according to this if the next pixel had the same color all is ok by this method
if a pixel was there that detail is lost

so it would be an "if" situation
4:2:0 half the pixels again (4)
4:1:1 different processing but (4)

a other thing that improved the image quality for VHS was a progressiv scan (more pixels but since the frames are combined sometimes the video shows bars)



(question about VHS image quality)
yes vhs image quality was bad and the image quality (personal videos from the past) are already of bad image quality

but exactly this question of having a bad image quality leads why the main raw file must be of highest image quality possible

after this i can set a compression the transfer speed can be 140/mb and 2000 gb of storage (thats the maximum my disc can do)

going for the signal and only taking 4:2:2 it would already compressed i might be wrong ?

but even wrose are the vhs tools 8000 kb/s maximum 4:2:0 or badder and again a compression (for example mp4)
and that beging progressed from a already compressed/skipped pixels

thats a triple lose if it would sum like that
and leaves the 50 frames question open
they either use interlaced videos or single frame scans (25p)

better would be a image of both (50 frames) and interlace them in high quality
(https://de.wikipedia.org/w/index.php...0061205214625&)

well looking?:
https://www.videoproc.com/media-conv...erlace-dvd.jpg


i could be totally wrong and im free to hear any kind of criticism
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