mpeg quality

tandi wrote on 4/25/2003, 11:10 AM

I am wanting to convert a 5min AVI clip into MPEG1. So far my attempts have resulted in significant quality loss with disc space useage around 100MB. I was wondering how video disc manufactures manage to produce a good quality 90 min film and fit it on to a 700MB disc. What am I doing wrong? Thanks a lot for your help.

Comments

Josh15 wrote on 4/25/2003, 11:35 AM

90 Minutes of good quality mpeg1 video on 700MB sounds like a miracle. I guess 60 minutes is more like it. Anyway, it basically depends on two factors: source quality and encoder. The "disc manufacturers" use the highest quality video (better than DVD), and I guess they use a far better encoder than the one vegas has (probably hardware encoder).

riredale wrote on 4/25/2003, 11:58 AM

I think there's also an artifact tradeoff involved. Try softening your avi before encoding. In that way, the MPEG1 encoder won't have to work so hard, and although the results will be slightly softer, there will be far fewer blocky artifacts. You'll have to decide which look you prefer.

ericb wrote on 4/25/2003, 3:39 PM

Not all AVI's are created equal! For example, if your source AVI is a DIVx, it may look good when playing, but DIVx is a lousy editing / rendering source. I have used DV AVI as a source for mpeg1 and it looks great. Other considerations - are you changing frame size and what bit rate are you using.

vitalforce2 wrote on 4/25/2003, 4:08 PM

I recently converted a DV AVI 8-minute file to MPEG1 straight through the V4 "Tools>BurnCD>VideoCD" command, and it gave me the 'best' quality VCD I've made compared to other software. This is my last comment on such things, though, having just purchased Sony's DRU500AX DVD burner....

kameronj wrote on 4/25/2003, 5:20 PM

I recently converted a good 21 minutes worth of AVI into MPEG and it turned a very good quality at 318 MB. I'm dabbling with some conversion software (shareware) called "EasyX Video Converter".

It's a timed shareware...only $30 bucks....go to www.easyXsoft.com

tandi wrote on 4/27/2003, 7:52 AM

What do you mean by "softening" my AVI?