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Dez

Posts: 86

Posted: Thu, 9th Feb 2006 09:42 Post subject: Bad IVTC, bad Crop, bad AR?	Quick Quote Quote

Hi, can someone explain what IVTC, Crop and AR are when mentioned in the reasons for propering a movie? There seem to be an unusual amount of proper releases the past few weeks and I have noticed that personally I do not mind some of the "nuked" releases - e.g. Munich: DVL release propered because of bad IVTC but I checked the movie and I don't notice anything... I am not a quality freak, DVD screeners are okay for me, unacceptable is jerky playback, out of synch sound and similar issues which really prevents one from watching a movie. Thanks for the help! Anyone know why the first Domino release was nuked? Is it really unwatchable?

chiv

Posts: 27530
Location: Behind You...

Posted: Thu, 9th Feb 2006 11:53 Post subject:

on dvds, the picture will almost always have black bars around it, usually to keep the aspect ratio... these are not needed or wanted on dvdrips, so they are 'cropped' out, so all you see is the image. a release will be nuked if the black bars have not been removed, because it lowers the overall quality of the video because the unnecessary black sections of the video have not been removed, which basically eats up the bits that should have been used on the image of the movie that we see..

ar, aspect ratio, is the length of the video in relation to its height (300x300 sized image is an ar of 1, a 450x300 image has an ar of 1.5, and a 600x300 image has an ar of 2... if the ar is incorrect for a film, the picture will look squashed or stretched... basically the image will not be true to its source.

and ivtc just plain looks ugly... read this for a bit of a heads-up on it:

Code:

http://www.doom9.org/ivtc-tut.htm

nouseforaname
Über-VIP Member

Posts: 21306
Location: Toronto, Canada

Posted: Thu, 9th Feb 2006 17:12 Post subject:	Quick Quote Quote

also just to add, sometimes a movie is overcropped, meaning they cut off more than just the black bars. bad-IVTC basically means they didn't remove the extra frames that were added to convert it to NTSC (N.American format) in the first place film = 24 fps, converted to ntsc = 30 fps, so basically the non-ivtc version will have 1/6 more frames to compress. at the same size (ie 700mb) the 24 fps version would look better because there was less to compress. hope that makes sense asus z170-A \|\| core i5-6600K \|\| geforce gtx 970 4gb \|\| 16gb ddr4 ram \|\| win10 \|\| 1080p led samsung 27"

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