PDA

View Full Version : correct bitrate


wiggy
1st January 2002, 01:09
Hi All,

I reckon this question has been asked a million times before, all I want to know is, how do I find out the correct bitrate needed for a film to fit on either 2 or 3 cd's.

Let me give you an example:

I want a 90 minute film to fit exactly on 2 80 min cd's [45 mins on each disc] and a 100 minute film to fit on 3 whole 80 min cd's [33 mins on each cd].

I understand the basic premise of dvd2svcd, but the bitrate section gets me a bit confused.

The reason I am asking this is because, just recently I have ripped a film which was 95 minutes long, 90 minutes of the film were spread over 2 80 min discs, and the final 5 minutes of the film was left to just one disc, what a waste, even if they were just the credits.

I want to be able to rip a film, and at the same time know exactly how many discs they would be spread over [to my liking i.e. 2 3 or 4 discs] depending on the length of the film.

I am sorry if this question has been asked before, but I do need some help.

Cheers.

btw, what a great set of programs, keep up the good work lads.
:(

Matthew
1st January 2002, 07:19
"I want a 100 minute film to fit on 3 whole 80 min cd's [33 mins on each cd]."

Make the first line in the bitrate tab say: "between 0 and 105 mins use 3 CD size 797". No other lines matter. Change this line for each rip.

Then get a bitrate calculator - there is a really simple one at vcdhelp.com that runs via an internet browser. You can use that to calculate a bitrate, which will become your bitrate if you use CBR or your max average bitrate if you use VBR (use a figure a little lower than the bitrate calculator guives you in order to be sure).

Labersack
1st January 2002, 14:43
You don't need any bitrate-calculatur, DVD2SVCD will do this for you.
Your third small file sounds like you have checked 'min.avg'. Uncheck it. The rest of your settings seems to be correct. Did you make CBR or VBR in CCE-Settings? If you dont use CBR or VBR >=3 passes, CCE will make the filesizes sometimes not exactly.
Try it without 'min.avg.', and if you will get problems again, post your settings and your logfile here.

Kedirekin
1st January 2002, 15:08
Oh, he shouldn't have hit the minimum average, unless he has changed the minimum to be quite high. 95 minutes on 2 80 minute CDs should use an average of about 2050 kbps or so (compliments of FitCD, 47:30 per CD, SVCD bbMPEG muxing with scan offsets, one 224 kbps audio track).

wiggy, if you still have the dvd2svcd log file, see what it used for the average bitrate in CCE.

Also, in future, if you have a session that puts a little bit on an extra CD, you can rescue the situation without re-encoding the whole movie by re-encoding the audio to the next lower bitrate and doing crash recovery. I almost always choose an audio bitrate in DVD2SVCD that is one or two notches above the minimum I'm willing to live with to allow myself a little breathing room.