How big should my file be?

[frink]

I converted a 2hr. 17 min.- .avi to xvcd with a 1490 bitrate and the resulting .mpg would not fit on 2-80 min. CDs. After splitting the file I had one at 903 mb. and the other at 830 mb. Does this seem normal? I had planned on using a 1800-2000 bitrate. If I had the movie wouldn't have fit on 3 CDs either. Can I use a VBR if I choose. I'm using VDUB, TPMGen, and Nero.

[DesiLondonBoy]

Dont worry about the size mate it depends on the minutes of the movie. You can get up to 79 minutes of film on a 80 min cdr. I have had movie sizes of 800 megs and didnt matter because the minutes of film was around 75.

Hope this helps mate

Regards

Jay

[Conquest10]

903 doesn't sound like way off for your bitrate. there is a bitrate calculator at: http://www.vcdhelp.com/calc.htm but that may be a little too hard to find. especially since its on this site. using it you can calculate the bitrate you should use. that's why its called a bitrate calculator. a 2 hour 17 minute movie on two discs should be around 69 minutes per disc. 137 min/2=68.5 min. that length on a 80 min cd should calculate to 1343 kb/s with the audio at 224 kb/s. that was hard wasn't it?
now was that good enough Almighty King John?

[frink]

Now why do you have to be like that? If your gonna be a [deleted by mod] at least get the info correct. I didn't say the bitrate was 903 kb/s, I said my one of my files was 903 mb.
And I did use the calculator you refer to---THATS THE PROBLEM-- A 2hr. 17min. movie on 2- 80 min. CDs with audio at 96kb/s works out to a bitrate of 1482 kb/s. When I finished the conversion and tried to burn to disk, the files would not fit. I figured there was another problem, hence the post. Do you have any other suggestions, but with a little less sarcasm? What is a good resolution to work with for a xvcd of this size?

Please follow the rules - no bashing
offline

[robbin]

yes the bitrate was about right, i used a calc i use for over a year now and got 1506. but from what you write can i guess you used cbr not vbr? the calculated bitrate is ONLY intended for vbr as this way is the only way it can be predicted (alocating diffrent bitrates round the film round a certain avrdge, this way creating the deesired filesize. cbr alocates all the bitrate all the film and then getting the desired cd size is very hard.

[Conquest10]

Now why do you have to be like that? If your gonna be a sarcastic prick at least get the info correct. I didn't say the bitrate was 903 kb/s

neither did i. read before you go bashing someone.

[frink]

Robbin--I did use CBR when calculating the bitrate, I didn't know the calc. was for VBR only. Still, I would have thought It would have worked- it has for other projects.

Conquest10--I'm gonna have to direct you to the first sentence of your original post. You said "903 doesn't sound like way off for your bitrate. there is a bitrate calculator at"... You actually do refer to 903 as the bitrate.


P.S. - Ya, Mary-Ann was cute and everything, but Ginger just seemed...Dirty!

[Conquest10]

i said 903 mb for the file size as a result of 1490kb/s for the bitrate did not sound unreasonable. have i dumbed it down enough? or you still lost?

[frink]

Apparently I don't read minds like I used to. If that is what you meant, then maybe that is what you should have written. Anyway, I accept your apology... Now, why did the bitrate calculator allow me to use that kb/s bitrate knowing I was only using 2-700mb CDs? keeping in mind that 903mb was only approx. half of the resulting .mpg file after conversion.

[Conquest10]

are you using tmpgenc 2.59?

[mats.hogberg]

the calculated bitrate is ONLY intended for vbr as this way is the only way it can be predicted

Now, that's big news to be! My experience is quite the opposite. My file sizes are always much more accurate when I use what the calc says and encode to CBR, and why shouldn't it be so?
At CBR you give the encoder no choice but to use X bits/second. Multiply that by the movie length, and you'll come up with file size. VBR is (from the encoders point of view) much more complex. If you take the bitrate value (Y) from the calculation and use that as average bitrate, this would give you a file size of Y*movie length, but my experience tells me it's not that simple. I almost invariably end up with a slightly larger (10-20%) file than the average bitrate would account for. Obviously the encoder (TMPGEnc in my case) goes to liberties when allocating the bits, not ending up with the average set.

/Mats

[frink]

I'm using tmpgenc 5.910, and I following the "how to" guide step by step.
Would the file size be considerably smaller if I use VBR, and can I even use VBR to convert divx(avi) to xvcd?

[Conquest10]

I'm using tmpgenc 5.910

that's your problem. get rid of it and use any other one. 2.59 has a bug that makes your file larger than its supposed to.
edit: i'm sorry its 2.xx not 5.xx

[mats.hogberg]

You can use VBR to create an XVCD, but not all standalone players will handle VBR XVCD. In theory, at least, a VBR encoding at an average bitrate of X kbps will create a file of exactly the same size as a CBR encoding at X kbps. Depending of the movie (fast movement etc) you may get away with setting VBR average bitrate lower than what you use for CBR, and still get similar quality.

/Mats

[frink]

I think I'll try downgrading to tmpgenc 2.58 and switch to VBR to see if I can't get that file size down to something a little more manageable. Thanks for the advice.
Also, how do you do that thing where you put someones quote in a separate text box? It dosen't look like that when I use the quote button.

[Conquest10]

Also, how do you do that thing where you put someones quote in a separate text box? It dosen't look like that when I use the quote button.

in the post you want to quote from, click on the little box that says quote.

[offline]

or simply cut & paste the bit you want to higlight
and add the begining and ending quote BBcode.

eg:

blah blah blah