Sry if soemone has a guild for this already, didint see any in the stickys. Jsut wonder how i can make my own KVCDs. Ive downlaoded the plguins for TMPEG but the fiels are bigger than wht the originally were... how do i do this :S
KVCDs are simply 'Constant quality (CQ)' movies instead of 'specified bitrate' ones.
This does not mean that the resulting movies will be smaller that the original AVI file. Usually, AVI files are smaller than MPEG files.
KVCD (CQ) will simply mean that a movie made by using one of the templates gotten from http://kvcd.net/dvd-models.html will have constant quality through the whole movie and, since usually CQ gives as output minor bitrates than VBR, the final size of a CQ movie is amaller than a VBR (fixed average) movie.
Usual MPEG movies use VBR with fixed average: this mean that you set a fixed average bitrate so that the final movie size is large as you want (a DVD for DVDs).
K - movies, that is CQ movies, use VBR with Constant Quality. This mean that the bitrate simply change depending upon the frame complexity.
It does not exist any exact formula which links CQ value <--> output size. You just know that if CQ raises, the output's size raises also.
There exist some tool (CQMatic and CQCalculator) which approximate a CQ value once you give the software the input movie and an 'ideal' value for the output file size (4489 MB for a KDVD and 700 MB for a KVCD). But their result is never exact, since ther simply take random samples of the input movie (to make the test shorter. For an exact result you'd need to encode the full movie).
You only know that KDVD templates create CQ M1V or M2V files having those bitrates (and the higer CQ is the higher value of the bitrate becomes; also KVCD are VBR, even if VCD are CBR 1500 kbps):
- KVCD (325x240/288): MPEG-1 Video (M1V) from 300 to 1800 kbps;
- KDVD Half D1 (352x480/576): MPEG-2 Video (M2V) from 300 to 2500 kbps;
- KDVD Full D1 (720x480/576): MPEG-2 Video (M2V) from 500 to 5000 kbps;
- KDVDx2 (704x480/576): : from 300 to 2500 kbps;
- KDVDx3 MPEG-1 (528x480/576): MPEG-1 Video (M1V) from 300 to 2500 kbps;
- KDVDx3 MPEG-2 (528x480/576): MPEG-2 Video (M2V) from 300 to 2500 kbps;
- SKDVD: MPEG-2 Video (M2V) from 300 to 2500 kbps.
I decide to stick with standard movie encoding (i.e. fixed average bitrate) because finding a good approximate value for CQ is too time-consuming and, if you use a DVD5 to contain a MPEG-2 encoded from an AVI file, the available free room is more than enough (garbage in = garbege out).
K-movies are useful, for me, only if one wants to put a 2h movie on a CD-R, not if one wants to encode KDVDs, and it's better to have a good+detailed movie (e.g. a SVCD split on two ot three CD-R) rather than losing final movie quality (and spending so much time) just to save some CD-Rs (= about half, or one, US$).
But this is only my opinion. Feel free to play with KVCDs as long as you wish...
Ah, remember: you must use TMPGenc Plus 2.5, not TMPGEnc Xpress.
