large avi files = really large mpeg files?

[edisonbrock]

I have several avi movies that are spanned over two discs, is there a way to convert to mpeg without it turning into a massive file?
I.E.
a 638 meg avi file (approx 65 minutes of run time) balloons up to 1.3gigs when i convert it to mpeg1. I am using tmpgenc to do the conversion.

Thanks for any help....

[cpgoose]

hey, this is what i got...

https://www.videohelp.com/phpBB/viewtopic.php?topic=73550&forum=3

[Vidbox]

On average a AVI is about 10x (100mb a minute compared to 10mb a minute) the size of a VCD NTSC 2.00 mpeg1 files. What Mpeg format are you converting to? (352x240; 44100, 1150 cbr?)

[mikewg]

If he's converting AVI to MPG and it's getting bigger, my guess is he's converting a DivX AVI file to VCD MPG. DivX is a compressed AVI format, but use this method when making a VCD:

1 Minute = 10 Megs

That is always true when making a true VCD. So if your clip is 65 minutes, your VCD will be 650 Megs. If you're getting a MPG bigger than that, you're not using standard VCD settings, and are making a xVCD, which is not as standard and not always as accepted as a VCD is.

How are you converting your AVI to MPG? I'd use TMPGEnc, and make sure you load the VCD settings. Follow the guides on the left if you're confused on how to do this.

[edisonbrock]

you are right it is a divx avi file. It is 640x272 i think i am just a setting or two off. Keeping it widescreen shouldn't be a problem right?

[mijman]

VCD standard is 352x240, and does not support widescreen, per se. You can encode it, using a frame spec of "full screen, keep aspect ratio" and It'll insert black bars to make up the difference.

[edisonbrock]

Ok..just when i think i have it correct...I did several trial runs and each time it seemed that i was in the 10 meg per minute ratio. I start the encoding process, and 2 hours later i am at 42 percent complete with the source position at 52 minutes and with a 520meg file size already. the movie is 1 hour and 5 minutes which should translate to 650 megs right? So why is the ratio correct but the file size is still astronimical?