Old 27-11-2006   #1
CD Freaks Member
 
pwjnc's Avatar
 
Join Date: Sep 2006
Location: NC USA
Posts: 120
How much mb can be shrink into a 4.7 gb disc

I know when I have a 698 mb video dvdsanta usually make it a 4.3 dvd. How big can a file be in mb before a shrink dvd program can not shrink any more room into a dvd. Like 900 mb or 1 gb? Thanks for any help.
pwjnc is offline   Reply With Quote
Old 27-11-2006   #2
MyCE Resident
 
Mr. Belvedere's Avatar
 
Join Date: Jun 2001
Location: (╯°□°)╯ ლ(ಠ益ಠ)ლ
Posts: 19,343
Re: How much mb can be shrink into a 4.7 gb disc

It is not a matter of filesize but a matter of quality. If you accept a greatly reduced quality, then the filesize will drastically decrease.

In general the MPEG format works as follows:

1: store frame 1 completely
2: store only the changes when comparing frame 1 to frame 2
3: store only the changes when comparing frame 2 to frame 3
4: and so forth.

This usually results in a 99% compression compared to a full uncompressed video.
There are two kinds of compression: lossless (no reduced quality) and lossy (reduces quality).

DVD Shrink uses a technique to re-encode the mpeg format into smaller mpeg. This will reult in quality loss (usually noticable on black backgrounds with dark, fast moving items).

In theory you can shrink to infinity, but after a few steps the quality would be horrible to such a state that it's not watchable anymore.
__________________
"Use the force Harry!" - Gandalf
Mr. Belvedere is offline   Reply With Quote
Old 28-11-2006   #3
MyCE Resident
 
TimC's Avatar
 
Join Date: Mar 2004
Location: UK
Posts: 7,496
Re: How much mb can be shrink into a 4.7 gb disc

It's also a factor of the length of the video. A movie of 90mins will convert with very decent quality to a DVD but the quality will be significantly reduced if the movie is 180 mins.
Also the type of movie can be a factor. Animations convert very well but movies with a lot of high speed action and/or colour tones will probably suffer more.
TimC is offline   Reply With Quote
Reply


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
will convertx shrink avi files to fit 4.7 gb disc jordychris Burning Software 10 27-08-2009 13:15
1 GB of data on a 700 MB CD-R? syguy Newbie Forum 6 05-11-2007 21:24
Data to be written: 4,483 MB | Space available on disc: 4,482 MB guarriman Nero & InCD 6 01-04-2007 10:22
GB (1024^3) vs GB (1000^3) disc size and file sizes... Jeff D Newbie Forum 1 11-04-2005 22:08
Ddump produces 750 MB file from 650 MB disc Loosley Burning Software 3 11-01-2003 23:10


All times are GMT +2. The time now is 22:27.
Top