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how to achieve the same quality as the original dvd?
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nsctsunom
Newbie
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31. January 2010 @ 23:09 |
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operating system: vista home premium
cpu: intel's 8500
ram: 4gb (800hz)
software: divx 7.2 and aoa dvd ripper
i would like to know how can you achieve the same dvd quality if you plan to rip a certain scene from the dvd?
i already know how to rip the scene using aoa dvd ripper, but i'm not sure on what bitrate i should use.
i'm using divx 7.2 and i don't know what options i should click to make my video file as good as the dvd quality.
i'm talking about the video and audio bitrates, frame rate and size.
i do want the video file to play using up the whole monitor.
thank you for your help
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AfterDawn Addict
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1. February 2010 @ 00:39 |
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If you want to retain "The Same Quality", then you need not apply any compression, which means you have to cut that portion as an mpeg2 without re-encoding. There are many software that can do that, but if you want it for free, You can do that using DVD Shrink in re-author mode.
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seagrave
Member
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9. February 2010 @ 18:43 |
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I use Shrink for ripping most DVDs using reauthor mode to get rid of the crap... and to avoid any compression I set the DVD size to double layer. If I can't use Shrink, I use AnyDVD or DVD Fab to rip, then Shrink to edit. I then use the resulting file for encoding.
I use a variety of DIVX and XVID tools... and after 5 years of this, I've come to realize that DVDs are now obsolete and with boxes of disks I?m running out of room. So it's now rare that I'll go DVD to DVD. I stopped torturing myself about quality and instead I'm happy just settle for good quality fitting 3 movies on a disk. Bitrates vary depending on the length of the film.
Here's one DIVX tutorial that might help, though it's a bit dated:
http://labs.divx.com/DrDivXUserGuide
(Edited to remove my recommendation for XVID encoding with AVIDEMUX.)
This message has been edited since posting. Last time this message was edited on 21. February 2010 @ 12:40
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seagrave
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28. February 2010 @ 23:01 |
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Originally posted by seagrave:
I stopped torturing myself about quality and instead I'm happy just settle for good quality fitting 3 movies on a disk. Bitrates vary depending on the length of the film.
After getting some rather long movies... 2.5 hours+ I'm back to torturing myself. When I encode to DIVX using TMPGEnc I go for 29.97fps and full resolution. It seems the 1480meg size just doesn't cut it. Even using 2 passes and the insane DIVX setting, I can still get blockiness. So at times I will go up to the 2gig size. Above that some DVD players won't play the file. I know bit rate doesn't mean anything given the different frame rates and resolutions. But assuming a full 720x480 pic at 29.97fps, 1220kbs is not sufficient. I'd be careful below 1500kbs.
I really wish there was a chart for all the possible resolutions/framerates showing good/better/best bitrates.
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Senior Member
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1. March 2010 @ 00:16 |
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Most movies on DVD (NTSC) use telecine to get from the
24 (film) > 30 (TV) frame rate. When you make the AVI, for best quality,
the telecine should be reversed, and the frame
rate of the avi file should be 24 (23.976).
AutoGK and some other do this automatically.
Having a lower frame rate (and the overall less frames), result in
less bit-rate requirements per movie compared to a 29.97 equivalent
movie, and you get a cleaner movie - no duplicate frames.
This message has been edited since posting. Last time this message was edited on 1. March 2010 @ 00:16
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seagrave
Member
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1. March 2010 @ 11:53 |
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Originally posted by davexnet:
Most movies on DVD (NTSC) use telecine to get from the
24 (film) > 30 (TV) frame rate. When you make the AVI, for best quality,
the telecine should be reversed, and the frame
rate of the avi file should be 24 (23.976).
Thanks davexnet. I never looked at it that way... but that going to 24fps was merely an easy way to reduce the bitrate. But how can we be sure that the 6 frames per second that are being lost are duplicates and not new interpolated frames? And while I know some Blu-Ray disks can have original 24fps framerate, what judder problems does this cause on widescreen TVs when all motion differences are magnified?
From Wikipedia:
Quote:
DVDs
On DVDs, telecined material may be either hard telecined, or soft telecined. In the hard-telecined case, video is stored on the DVD at the playback framerate (29.97 frames/s for NTSC, 25 frames/s for PAL), using the telecined frames as shown above. In the soft-telecined case, the material is stored on the DVD at the film rate (24 or 23.976 frames/s) in the original progressive format, with special flags inserted into the MPEG-2 video stream that instruct the DVD player to repeat certain fields so as to accomplish the required pulldown during playback.[11] Progressive scan DVD players additionally offer output at 480p by using these flags to duplicate frames rather than fields.
NTSC DVDs are often soft telecined, although lower-quality hard-telecined DVDs exist. In the case of PAL DVDs using 2:2 pulldown, the difference between soft and hard telecine vanishes, and the two may be regarded as equal. In the case of PAL DVDs using 2:3 pulldown, either soft or hard telecining may be applied.
Actually this solves a mystery. At one point I was using Handbrake to encode to XVID... and I always had the framerate set to ORIGINAL... same a source. And I'd keep getting 23fps. I thought it was an error and was one of the reason I gave up on HB... that and some movies just exhibited too many artifacts on WMP. But this explains it.
This message has been edited since posting. Last time this message was edited on 1. March 2010 @ 12:00
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Senior Member
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1. March 2010 @ 13:52 |
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I can't comment specifically about blu-ray. I don't use it at home
and have not investigated it. However, the big screen TV's have
technology to duplicate frames in certain patterns to resolve
movement and judder issues. Perhaps somebody else will flesh this
out further.
Regarding the 29.97 VOB; open it in virtualdub (with FccHandler's
mpeg-2 plugin installed) and you'll typically see the familiar pattern
of 5, 2 frames that look interlaced and 3 that look progressive.
This is the typical telecine pattern.
For more info from an expert, download Donald Graft's dgdecode/dgindex
package. Use DGindex to check the properties of your mpeg-2/VOB
and read DGIndexManual.html for the explanations.
http://neuron2.net/dgmpgdec/dgmpgdec.html
This message has been edited since posting. Last time this message was edited on 1. March 2010 @ 13:54
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seagrave
Member
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2. March 2010 @ 22:11 |
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Originally posted by davexnet:
Regarding the 29.97 VOB; open it in virtualdub (with FccHandler's
mpeg-2 plugin installed) and you'll typically see the familiar pattern
of 5, 2 frames that look interlaced and 3 that look progressive.
This is the typical telecine pattern.
Can I get the same info from G-Spot? I just opened a VOB and it reads 23.97 pics per second but 29.97 fps. So I take it it's a hard telecine encode? And encoding to DIVX at 23.97fps will get rid of only the duplicate frames? Or is there more to this I should know?
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Senior Member
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3. March 2010 @ 00:21 |
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Encoding it in AutoGK will give the proper frame rate,
perhaps Avidemux, Handbrake, most of the better tools should do it.
To use virtualdub, use DGindex and create a project d2v file.
(set video/FORCE FILM assuming it is actually telecined film).
Address the D2v in an AVS file (avisynth script - process described
by Donald Graft in his doc).
Then drag the avs file to Vdub.
It sounds as if Gspot is giving you the correct info.
This message has been edited since posting. Last time this message was edited on 3. March 2010 @ 00:22
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AfterDawn Addict
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3. March 2010 @ 10:42 |
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FairuUse Wizard is a good converter as well...it has an option to automatically detect the field combination. Can encode using DIvx/xvid, x.264, with multipass codec settings available....
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seagrave
Member
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5. March 2010 @ 21:42 |
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Thanks everyone. I'm trying to stick with TMPGEnc because it has some features I really like. It doesn't say it has IVTC per se but I have to assume it does. It automatically deinterlaces and has an option to encode DIVX at 23.97fps.
Any thoughts on TMPGEnc?
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AfterDawn Addict
1 product review
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5. March 2010 @ 22:06 |
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I only have used TmpgEnc Xpress, and used it once just to try it out. I converted to a H.264, and wasn't very happy with its speed and quality compared with FairUse or Handbrake.Never used it for Divx conversions.
If it works for you, I'd stick with it.
Piss me off, and I Will ignore You!
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seagrave
Member
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6. March 2010 @ 11:45 |
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Originally posted by cyprusrom:
I only have used TmpgEnc Xpress, and used it once just to try it out. I converted to a H.264, and wasn't very happy with its speed and quality compared with FairUse or Handbrake.Never used it for Divx conversions.
If it works for you, I'd stick with it.
I have to agree that TMPGENc wasn't that good with H264... which is odd since I believe it uses the Main Concept implementation. That's why I started using Handbrake for such projects.
But Handbrake didn't do XVID well. I was getting too many artifacts in WMP even at high bitrates yet the video played fine in VLC. I just didn't want to take a chance there'd be some incompatibility with DVD players.
I was more curious about TMPGEnc's ability to do IVTC.
This message has been edited since posting. Last time this message was edited on 6. March 2010 @ 11:48
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AfterDawn Addict
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6. March 2010 @ 11:51 |
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I don't convert to Divx/Xvid(unless I do it for someone), everything I do is H.264/x.264. I like the better quality in a smaller size...
HandBrake totally dropped support for Xvid, not dealing with it anymore. Now they just focus on x.264.
Cannot comment further on the TmPgEnc.
Piss me off, and I Will ignore You!
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22. March 2010 @ 15:34 |
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I have another pc i use strictly for movies. i rip all my dvds etc to that system. its a media pc only. streaming movies to ps3, TV etc. I dont use discs anymore since they scratch up, etc. a media file on a hard drive is much better. and no worrys about what size to shrink it to etc.. Just upgrade the hard drives when needed. just get a few 500 gigs and your good to go for a while.
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