Advice needed for Mpeg-1 Settings

p@mast3rs wrote on 7/8/2003, 6:42 PM
A few months ago, I was cutting one minute segments in mpeg-1 and I had a fairly small file size. Now I find myself havign to redo this again for another project and unfortunately, it seems like my file sizes are twice the size using roughly the same bit rate.

My settings are:

Mpeg-1 (not VCD) 352x240 CBR 500,000. With those settings, I end up with over 10MB per file. My previous project files averages 5-7MB.

I know there was a thread that a while back that said what settings to change to achieve this. Unfortunately, Im unable to locate that thread.

Can someone please give me szome advice on how to shrink the file size from 10MB to 6MB withouth changing the bitrate? I have a project due in 48 hrs.

Thanks in advance.

Comments

swampler wrote on 7/8/2003, 8:08 PM
Well, if you want a CBR of 500,000 and a smaller file size, then you have to decrease the resolution. Try a setting smaller than 352x240 (I'm not sure what's standard).

p@mast3rs wrote on 7/8/2003, 8:33 PM
Yeha but what I am saying is that I had the same resolution of 352x240 before and had 6mb files. There were some settings I could decrease such as I frames and quality etc... but I cant remember exactly what they were.
swampler wrote on 7/8/2003, 9:09 PM
I don't know then. I thought for the same length movie at a give resolution and given bitrate, the file size was a given value. Perhaps there's something I'm not aware of. Let's see if someone else can help.
p@mast3rs wrote on 7/9/2003, 5:11 AM
anyone else with some advice?
p@mast3rs wrote on 7/9/2003, 12:21 PM
no one has any adive? Not any even SoFo guys?
craftech wrote on 7/9/2003, 12:49 PM
Have you tried www.vcdhelp.com?
p@mast3rs wrote on 7/9/2003, 7:04 PM
vcdhelp is not going to help me with settings inside VV4. Thanks for your advice though. :)
craftech wrote on 7/9/2003, 8:46 PM
I don't see much talk about Mpeg1 on this forum. Try the DV forums:

http://www.dv.com/community/

Go to the "Inside DVD" forum. Sign up and post the question to Ralph LaBarge who moderates the forum. He is an author who can probably answer the question in general terms which you can apply to Vegas. Might take a day to get an answer though.

John
SonyEPM wrote on 7/10/2003, 8:58 AM
If you want the same bitrate but need smaller files, you can change the frame size or frame rate, or possibly drop the audio bitrate a little. Project length also factors in obviously.
mikkie wrote on 7/10/2003, 9:27 AM
DVDrhelp or doom9 etc. do have a bit of general encoder settings advice in their guides if it helps. In any encoder, the quality of the source, and the complexity of the picture you're encoding can have a dramatic effect on the ultimate file size - 30 frames of black take up quite a bit less room then shots of a spinning ferris wheel, and the same effect happens the more noise is present.