Originally Posted by coffeeman101
so basically everyone will agree, you can't tell the difference between a 720 rip and a 1080 rip of the highest quality download of the same movie etc etc?
if no one can tell the difference, and certain posters are using 80" lcd's 60" plasmas, 120" 1080 front end projectors, etc etc
No we would not agree. Some movies (the actual movie itself) are more detailed than others some are soft to begin with and don't have fine detail that requires 1080p to reproduce, some do. It's not as simple as just "all you need is 720p". I mean heck, I'm quite looking forward to 4K.
if someone is comparing the same 720/1080 rip, on his 50" plasma to his 120" projector and not seeing any difference..
then why on earth are we downloading 1080 rips which are like 10-30gigs in size??
when we can just get the 720 version and save space.
Good question, why are we discussing illegal downloads on AVS, I means it's against the forum TOS.
But beyond that, making any judgements based on an illegal download created by who-knows-who on the internet is an fundamentally flawed process. You don't know anything about the source quality, the encoding quality, settings, so you have no scientific basis for knowing if there even should be a difference between the 1080p and 720p movies you download.
If you really want to test whether it's possible to see the difference between 720p and 1080p, then what you need to do is get a reference Blu-ray, (for example see this list http://www.avsforum.com/t/858316/the-new-pq-tier-thread-for-blu-ray-discussion
), and then compare it with the output of your player (PC or BD player) set to 1080p and 720p. And be sure you're seating distance is appropriate: http://carltonbale.com/1080p-does-matter/
If you want to know if you
should rip the Blu-rays you buy without recompressing them, or if you should recompress them to 720p (or something else) then you should try it for yourself with your display, your eyes and your seating distance/environment. Nobody else is going to be able to tell you where the line is for the limit of what you can see on your system.
I advise not recompressing anything since you don't know what your system will consist of in the future.
Originally Posted by coffeeman101
what would you say is the best size file to download then, I mean there are so many different sizes out there 6gig-8 gig 12 gig, 22 gig, 32gig
I mean how much difference in quality are we talking with a great 8gig rip to a 32 gig rip?
I don't know where you're downloading that you get those options, Vudu doesn't give you such options, nor does Amazon, or any other legal source that I'm aware of. The best quality is never achieved by illegal downloads, it's by ripping the Blu-ray with no recompression.
Originally Posted by pittsoccer33
there are a lot of reasons a file could be smaller. the #1 reason is that all bluray movies are encoded at 16x9. even if that's not the aspect ratio of the movie they encode the blank black space. so Lawrence of Arabia has the black letter box bars hardcoded and Its a Wonderful Life has the side pillar bars hard coded. the image always has 2,073,600 pixels on a bluray disc.
FWIW, the bars are inconsequential to the final file size (encoders are smart). But you're right there are a lot of reasons files can be different sizes, you can tell the encoder to compress any resolution to just about any bitrate. You could tell the encoder to encode a Blu-ray to 1080p and a final size of 1GB. It would look like crap, but you could do it.
i cant tell you what looks good. i ripped my dvds to xvid avi files that turned out to be 1.5gb or so 10 years ago when hard drives really were expensive. they looked great on a 24" sd tv. they looked pretty good on my first hdtv (low end 37" 768p lcd set). they looked like garbage and needed to be redone when I bought a larger 1080p plasma. all the flaws were exposed. i remuxed all of them to wtv files without compressing. and dozens of those have been replaced by blurays and hd-dvds.
Yup, exactly, one of the best reasons I say not to recompress, do you really want to rerip again in the future? What if you get a much larger 4K TV in the future (all TVs will be 4K before too long, and sizes always get bigger) your "awesome" 720p rips today may look like crap on your equipment tomorrow.