Best Quality Encoding
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jazzman161




Posts: 4

PostPosted: Mon, 13th Feb 2006 19:38    Post subject: Best Quality Encoding
Hey guys. Question for all you encoders out there. Here's my situation. I'd like to build a movie collection so I'm always buying DVDs or renting from BB/friends and ripping them. However, one day I noticed that on IRC, some groups are releasing dvdrips w/ 5.1audio at around 1.5gigs per movie. I thought to myself, "Great. I'll DL these and everything will be perfect." Well I've burned a few and the quality seems fine although I have noticed some pixelation issues in really really dark movies (ie - Doom). My question is, can I encode these movies (using TMPGEnc or the FilmMachine etc) to increase the video quality of these movies or am I SOL? Would it even be beneficial to do so? Basically I'm trying to get the best video quality out of these 1.5gig movies since the actual dvd backups I have are as near perfect to VQ as they can get w/o the actual DVD and I'd like to accomplish this w/ these new files.
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knives217




Posts: 648

PostPosted: Mon, 13th Feb 2006 21:09    Post subject:
Well, transcoding from already encoded video to get better quality is very hard work, it takes long development of filters and such to increase the amount of data for the video. Though, to encode from the DVD, I suggest to use either AutoGK or Gordian Knot. While AutoGK is very easy, Gordian Knot offers lots more options. Here's the sites:

Gordian Knot: http://sourceforge.net/projects/gordianknot
AutoGK: http://www.autogk.me.uk/

Look on Doom9.org for some tutorials and more info.
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nouseforaname
Über-VIP Member



Posts: 21306
Location: Toronto, Canada
PostPosted: Mon, 13th Feb 2006 21:28    Post subject:
you can't add quality if it doesn't exist. I can't see how these dvds can even look that close to the originals. Are you sure they're mpgs and not divx avi?

for example, 5.1 audio is 448 kbps, doom is 100 minutes long. On a 1.5 gb rip you'd have a bitrate of ~1500 kbps for the video (or just over 1100MB), which is less than a svcd (using http://www.videohelp.com/calc.htm).


asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"
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jazzman161




Posts: 4

PostPosted: Mon, 13th Feb 2006 21:53    Post subject:
Sorry for the misunderstanding. I meant the backups I do off of ACTUAL DVDs are as close as I can possibly get them. I would like to increase the quality of these downloaded copies if its even feasible.
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nouseforaname
Über-VIP Member



Posts: 21306
Location: Toronto, Canada
PostPosted: Mon, 13th Feb 2006 21:59    Post subject:
gotcha Wink

you can't change the quality of the downloaded one, because they've discarded A LOT of information to get it down to that size.

It will never look like the actual dvd, especially on a tv larger than 10 inches Wink

You'd probably have more luck going from a 2cd divx/xvid rip to a dvd than using these smaller dvd format rips.


asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"
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jazzman161




Posts: 4

PostPosted: Mon, 13th Feb 2006 22:08    Post subject:
Yea that's actually what I do download (besides the flat out dvd-r images). For instance, (hope this doesn't get me in trouble) I just downloaded Harry.Potter.And.The.Goblet.Of.Fire.DVDRip.XviD-NeDiVx. That's what started this thinking. The bitrate on this thing is approximately 850 kbps according to GSpot. Now I haven't burned it yet to see what it looks like on my tv (Sony DVD player and WEGA 27" tv btw) but it's the lowest bitrate movie I've downloaded. Does this change the situation at all or am I still stuck with what I downloaded?
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knives217




Posts: 648

PostPosted: Mon, 13th Feb 2006 22:15    Post subject:
nouseforaname wrote:
you can't change the quality of the downloaded one, because they've discarded A LOT of information to get it down to that size.


As I said, if you were to use post-processing and such, you could generate all that data back to make it look better than what it was. Though it requires long hours of coding and testing to get just a particular movie looking good. I've seen it all done on a TELECiNE of Star Wars Ep 3 before, raised it to DVDRip quality.
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jazzman161




Posts: 4

PostPosted: Mon, 13th Feb 2006 22:20    Post subject:
Any idea what kinda process and time frame we're talking about or is it just not possible for a regular user? I'm away from my computer usually 12hrs a day due to school and what not and don't mind letting it run whatever it needs. Thanks.

-Josh
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nouseforaname
Über-VIP Member



Posts: 21306
Location: Toronto, Canada
PostPosted: Mon, 13th Feb 2006 22:44    Post subject:
look for avisynth scripts, and use them with tmpgenc ...

There are loads of filters for avisynth ... you should start here:
http://en.wikipedia.org/wiki/AviSynth

and here: http://forum.doom9.org/forumdisplay.php?f=33

but still, if you're doing 1.5 gb dvdrips (with dvd structure and mpg video), you're trying to turn shit into gold using these tricks. Maybe worth a try, but don't expect much.


asus z170-A || core i5-6600K || geforce gtx 970 4gb || 16gb ddr4 ram || win10 || 1080p led samsung 27"
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