divx calculators and movie file size to 700MB

[androoz]

hi, i am trying to work out how people convert full movies to a 700mb divx/xvid file.

i tried using calculators such as AdvBitRate195 and Ecuador's Bitrate Calculator, and they both tell me the same bitrate for a movie

length: 102.55 mins
audio quality i would like to use: Mp3 96kbps
file size: 700MB
TMPGEnc resolution setting: 576 x 240 pixels

bitrate given: 849kbps

i also use a constant bitrate mp3, but ive noticed that most of my HQ divx 700MB movies have a variable audio bitrate. does that make any difference?

i have gone through and converted the movie using divx 5.05 codec and end up with a file size of 829MB.


can someone tell me where i went wrong? i dont like the program gordian knot, as i would like to do everything my way.

i used: dvd2avi 1.76, and TMPGEnc to encode.

[benderman]

I use VirtualDUB and DivX5.05 and my files go very close for 700MB. For avi-output I would prefer VirtualDUB for encodeing and GordianKnot ONLY for calculating the bitrate. The bitrate-calc of the actual GK uses the right formula for DivX 5.05 so you don't have to test your actaul calculator, because Calculators for dfferent Codecs may give different bitrates (some calculate with a base of 1000, others use 1024).

[androoz]

when u say u come close to 700MB... is that over or under? because if its over, theres no point as the goal is to keep it about 700MB and under to fit on a single 80min CD-R.

[scdlcgs]

Most of the bitrate calculators that i know are not going to give you a precise number about your file size, because it also depends on so other things, not only the bitrate. The most exact tool for you to get the desire file size is, without any doubts, gordian knot. Gordian knot is able to analyse those other factors and give you the tools to get the exact size, trust me, dont waste your time with bitrate calculators, gordian knot is what you are looking.

[benderman]

"close to 700" means +/- 2 MB and sometimes it gets a little to big for a 702MB-cd-r. Then I simpley reencode only the end-credits with a lower bitrate. If you directly want to get less than 700 MB you have to lower the bitrate about 10-20 kbps. That way always produces files lower than 700 MB for me.

[BizzMan]

yes. most rips are around 700mb, not just 700... +- 2mb is perfect enough...

[rhawke]

Calc

The same thing happend to me.

I wanted a 700 MB file and got 850.

If it was only 706 it wouldn't matter. My burner can actually burn 706 MB's on a 700 MB CD.

There is a message everytime telling me that it could ruin the CD as well as the burner but until now, everything worked out fine every time.