What i would quickly like to ask here, is if there are any noticeable differences between an x264 mkv blu-ray rip of 4-6GB and an uncompressed blu-ray format?
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Yes, it's noticeable for me. But then some doesn't even notice any difference between sd and hd, so it depends who is watching.
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This is like the PCM vs MP3 argument, some people notice more than others.
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And a blu-ray is never uncompressed (an uncompressed 1080p movie would be GIGANTIC). The 4-6gb are just much more compressed.
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It depends on how the rip is encoded, but if done properly the difference is almost indiscerenable. Some will argue with that statement, but the .h264 codec is that good with compressing files.
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Not that good.
Near Uncompressed is something like 3200 Mb/s
BluRay (MPeg, VC-1 or H.264) is ~35 Mb/s max. or near 100x.
h.264 4-6Mb/s is... well ... over compressed.Recommends: Kiva.org - Loans that change lives.
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I backup my BDs to 8GB MKVs, two pass encoding. The quality is quite good, better than commercial DVDs. I can tell the difference from the BD when I project them on a twelve foot screen, but they are still very good quality. On a 22" monitor, hard to tell much difference. Considering they are compressed to about 1/3 their original size, I'm very impressed with the quality of H.264.
Reducing the size down to 4GB, the quality does drop off a fair amount. Probably 10 - 12GB would be the optimum for compact size vs quality. -
There is a difference in quality, seen easier as displays get larger.
Last edited by lordsmurf; 14th Feb 2010 at 03:48.
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I'm only asking cause i;m trying to decide if it's worthing backing up blu-rays to 1:1 dumps which can easily fill up a drive unless burned, or encode them and compress them to 4-6GB mkv files.
My Screen is 50 inch Plasma and I'm sitting in 2-3 meters distance when viewing, and this is why compression is a concern for me... -
Also depends on the content , and the quality of transfer to blu-ray from master. Some retail blu-ray titles have been low-passed or upscaled to 1080p, and barely have 720p actual resolved detail. In these latter cases downscaling to 720p and using 4-6GB will be hardly noticeable. On other titles there will be a huge difference with the proper setup
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I've never seen a true Bluray movie, only BR-rips
sorry if I go off topic
What would be better h264/AVC 15MBS or MPEG2 15MBS?The flag once raised will never fall! -
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The licensed versions of Vegas' Mainconcept AVC and Sony AVC implementation are limited versions of their full featured encoders. They only offer a limited subset of their own higher end encoders. This results in low quality for AVC, almost the same as MPEG2 (worse in some ways, better in others). Anyways, this is getting off topic. Start another thread if want to discuss Vegas encoders
Last edited by poisondeathray; 14th Feb 2010 at 10:48.
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No. You have to check it manually. There may even be differences from different versions of the blu-ray (eg. director's theatrical cut, limited editions, etc...)
A crude way of checking is to resize to 720p then resize back to 1080p and check in avisynth. If there is a big difference, you know that source has over 720 lines of actual resolution. If there is very little difference, that source was likely low passed , filtered , upscaled , or a bad transfer.
It matters, because 1920x1080 requires more bitrate than 1280x720 for a certain level of quality. If the source you have is only 1280x720 of actual resolution & detail, but upscaled or filtered, then it makes no sense to encode to 1920x1080 at a high bitrate
Note the content matters too. If you have an action movie, or a movie with lots of grain for example, it will take a lot more bitrate than a slow moving drama with minimal grain to encode for a certain level of quality. So don't get fixated on a certain size like 4-6GB or a certain bitrate
You can do these tests yourself, and that's really the only way to be sure with a particular source, and particular hardware setup
Especially concerned about TV Shows. IS it possible that sources is an actual 1080p?
BTW ho much disc space do Blu-rays use? Do they get close to 25GB or 50GB?Last edited by poisondeathray; 14th Feb 2010 at 13:55.
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