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 Posted: Sat, 23rd Feb 2008 13:29 Post subject: 720p vs 1080p, quality of scene releases |
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I just calculated that 720p contains 921600 pixels and 1080p 2073600 pixels, this makes a difference by 2,25x.
720p scene releases are usually ~ 4,5 GB to fit on a DVD5. If I substract ~500 MB for compressed 5.1 sound, that leaves me ~ 4 GB for the video. If I want to encode the same video in 1080p with the same bitrate per pixel ratio, I would need 4 x 2,25 = 9 GB.
1080p scene releases are usually ~7,5 GB to fit on a DVD9. I again substract 500 MB foir audio and get 7 GB for the video.
This leads me to the conclusion that 720p scene-rips have a higher bitrate per pixel.
If I have a screen with a resolution between 720p and 1080p, would a slightly upscaled 720p video look better than a slightly downscaled 1080p video given the bitrate differences I metioned above?
I know that most people wouldn't be able to tell the difference anyway, it's just a theoretical question.
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LeoNatan
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| Posted: Sat, 23rd Feb 2008 18:26 Post subject: |
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Don't let me start on scene releases... But if you get your releases from Usenet, you could go for the proper 1080p releases (= Esir, CtrlHD, H2, ...), which are a bit larger, but quality is obviously the main goal there, not exact DVD9/2xDVD5 ( ) size, or releasing as fast as possible.
And to answer your question, no way 720p upscale looks better than a real 1080p encode on a 1080p monitor. It still looks nice, but nowhere near as good as 1080p.
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nouseforaname
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| Posted: Sat, 23rd Feb 2008 21:11 Post subject: |
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Can't forget that the size of the display matters as well. I'm sure what you said is true for > 42" 1080p monitors, but I wonder about say 42" and smaller TVs...
asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"
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LeoNatan
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| Posted: Sat, 23rd Feb 2008 21:36 Post subject: |
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I've noticed a difference on a 24" monitor, but then again, I was close. So yeah, it depends on the distance as well.
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| Posted: Sat, 23rd Feb 2008 22:55 Post subject: |
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| LeoNatan wrote: | | And to answer your question, no way 720p upscale looks better than a real 1080p encode on a 1080p monitor. It still looks nice, but nowhere near as good as 1080p. |
I meant a monitor that is somewhere between 720p and 1080p. I'm getting a notebook with a 1400x800 screen and my next desktop monitor will most probably be ~900 pixels in vertical resolution.
A few days ago, I watched "Shoot 'em up" 1080p with 5.1 sound compressed to 7,5 GB on a friend's HDTV and the lack of bitrate was obvious, so I was wondering what would be better for a 800 - 900 vertical resolution, high bitrate 720p upscaled or low bitrate 1080p downscaled.
BTW: I do use Usenet,are there other groups you can recommend besides Esir, CtrlHD and H2?
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LeoNatan
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| Posted: Sat, 23rd Feb 2008 23:05 Post subject: |
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XSHD, SS.
Most of the original encoders are now part of CtrlHD. If you get one of those releases, you are guaranteed to have a quality release.
Shoot 'Em Up 2007 1080p BluRay DTS x264-CtrlHD
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| Posted: Fri, 29th Feb 2008 17:02 Post subject: |
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What's the deal with the amount of artifacts on a lot of the 720p rips I've been getting......
Bad technique, or the software not refined yet?
I'm converting the mkv files to vob with mkv2vob for PS3, but the readme states that the program doesn't alter the mpeg stream so I don't think this is screwing up the video.....
Last edited by LanceBullet on Fri, 29th Feb 2008 17:05; edited 1 time in total
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LeoNatan
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| Posted: Fri, 29th Feb 2008 17:04 Post subject: |
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Using CoreAVC? I know this isn't popular, but many x264 encodes have artifacts with CAVC. Try playing same encodes with ffdshow tryouts.
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| Posted: Fri, 29th Feb 2008 17:06 Post subject: |
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Been using tversity to stream large vob files (PS3 compatible) over lan.
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LeoNatan
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| Posted: Fri, 29th Feb 2008 17:08 Post subject: |
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Hm, can't help you with that. But I never see any artifacts, so it's probably a problem with that software.
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| Posted: Fri, 29th Feb 2008 20:09 Post subject: |
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Cheers, was streaming the media from USB2.0 external disk that was the problem.....
Copied to the laptop removed the issue.........
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