Quality loss after Dr. Divx conversion

[lexdiamond20]

I have a few avi's that I needed to drop to 512x364 from 720x480 if im not mistaken. The conversions were successful but there was a slight quality loss after all was done. Not a big drop just noticeable. The reason this bothers me is because I will be converting these to DVD and I know there will be additional quality loss on top of what I already have. Does this seem normal, to lose quality even though I dropped the resolution? The only settings I used on Dr. Divx were normal noise reduction and the better quality setting. Also, can anyone recommend other simple programs that will allow me to just drop the resolution on avi's. Im not in search of a program that has a multitude of uses, just one that will allow m to accomplish this one thing. along the lines of what Dr. Divx can do.

Thanks in advance

[jagabo]

Resolution is part of the "quality" isn't it? Try reducing the frame size to 1x1 pixel. How good is the video "quality" then?

If you are going to DVD later you should keep the resolution at 720x480. Or keep your original source for MPEG conversion later. Especially if your video is interlaced.

MPEG4 encoding will introduce macroblocks if you don't use high enough a bitrate. It will create a little mosquito noise around sharp edges at all bitrates. So, in short, use a higher bitrate.

[lexdiamond20]

Im not sure if its a bug but WinAvi is not converting the 640x(?) correctly. Btw, the original size from my previous post was supposed to be 640x(?) and not 720x640. It gives me a DVD file that is just a bunch of lines with the sound present and the file size way too large. But the files that are 512x364 are converting to DVD perfectly. Anyone else having problems like this. This is why I want to convert them to 512x364 before trying to convert in DVD. And guys I appreciate the help but please dont try to lecture me on how the quality of WinAvi is horrible and it is the worst program ever. It gives me what i need without all the hassle. I just need to know how i can drop my resolutions with little or no quality loss if its possible.

[jagabo]

Just use a higher bitrate for your Divx/Xvid compression. Or just use single pass target quantizer mode with a quantizer of 2.

[BJ_M]

as pointed out = converting to divx first - THEN to dvd will result is really bad quality no mater what ....


use avisynth or virtualdub and change the resolution and frame serve it to your dvd encoder

[guns1inger]

And using WinAVI will only make it much worse.

[KBeee]

as pointed out = converting to divx first - THEN to dvd will result is really bad quality no mater what ....


use avisynth or virtualdub and change the resolution and frame serve it to your dvd encoder

My view exactly.

You could resize from 640 X 480 to 704 X 480 or 720 X 480 in say, VirtualDubMod, then frameserve to your mpeg2 encoder with minimum loss of quality.

[manono]

And I hope 512x364 was a typo when a 1.33:1 AVI is 512x384.

So, you make crappy AVIs, ask how to make them look better, and then object when people point out that you're going about it all wrong?

Count me as another one wondering why you're even bothering to make this low resolution intermediate AVI.

[lexdiamond20]

Hey guys finally got around my problem and got the DVD done. Thanks for the help.

[jagabo]

Hey guys finally got around my problem and got the DVD done.

It might be helpful to others if you explained what you did.

[lexdiamond20]

Well, I did a little research and read up on bit rates. Downloaded a bit rate calculator and changed the bit rate to 1884, took the noise reduction option off and everything came out fine. Dropped the files in Win Avi, converted them to DVD files and then authored it in TMPGEnc DVD Author. Yes there was minimal quality loss but these were just a bunch of Howard Stern ON Demand clips that I wanted to put on DVD for my father. So to the prick getting "cunty" because I just wanted to do this quick with minimal time, screw you.

Thanks for the help guys.

No "c" word in the general topics thanks and abuse of others is unwelcome here. You are in breach of the forum rules and are being issued with a formal warning.
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