Noisy/Grainy image

Amo-Chan · Post by **Amo-Chan** » Thu May 31, 2007 6:10 pm

After rendering a video with Vegas and then compressing with Vdub, my video seemed kinda noisy and grainy...not too sure how to fix that. I'm still having avisynth issues so I'm having to use the filters in vdub. Could this problem be because I've sharpened the image too much?

NeoQuixotic · Post by **NeoQuixotic** » Thu May 31, 2007 6:51 pm

1) Please post a screen shot!
2) What are your project and rendering settings in Vegas?
3) What codec did you render and compress with?
4) And please post the script(s) you are using.

With that info, we might me able to help you ^_^!

Amo-Chan · Post by **Amo-Chan** » Thu May 31, 2007 7:03 pm

I don't know how to take a screen shot.
But, In vegas I used Huffyuv, Used NTSC DV widescreen template, frame rate 29.970, progressive scan, 720x480, not including audio.
And in Vdub I compress with xvid (doing two passes)

I use the deinterlace filter...and sharpened to 29.

Zero1 · Post by **Zero1** » Fri Jun 01, 2007 1:07 am

If you used the DVI profile, it's likely that it has now made your video interlaced (looks like a bunch of lines). If you then go on to compress this with XviD, it will likely turn out blocky because it is so hard to compress.

You need to use a different profile. Unfortunately I don't use vegas so I can't help you with that.

Amo-Chan · Post by **Amo-Chan** » Fri Jun 01, 2007 1:10 am

No. It's not a bunch of lines. I've had that problem once before. It's more like there's extra movement on top of the picture.

CrackTheSky · Post by **CrackTheSky** » Fri Jun 01, 2007 2:40 am

Amo-Chan wrote:No. It's not a bunch of lines. I've had that problem once before. It's more like there's extra movement on top of the picture.

To take a screenshot, open the video in VDub and go to Video>Capture Output Screen To Clipboard, open MS Paint (or some image editing program), and paste.

From your description, it sounds like you just have a lot of noise in the video, and VDub's internal filters probably aren't doing a very good job of removing it. What's wrong with AviSynth...why doesn't it work? In order to get your video looking good, AviSynth is the most efficient way to do it.

I don't have VDub on this computer, so I can't check to see if it has any, but have you tried using VDub's denoising filter(s)?

If you can get AviSynth working, read this.

Amo-Chan · Post by **Amo-Chan** » Fri Jun 01, 2007 3:08 am

Here's a screen shot.[/img]

JaddziaDax · Post by **JaddziaDax** » Fri Jun 01, 2007 6:43 am

that looks like its due to the sharpen filter

CrackTheSky · Post by **CrackTheSky** » Fri Jun 01, 2007 12:09 pm

CrackTheSky wrote:What's wrong with AviSynth...why doesn't it work?

Zero1 · Post by **Zero1** » Fri Jun 01, 2007 12:41 pm

Is it possible to upload the file somewhere like megaupload.com ?

Usually seeing it in action or just checking the file can reveal more than a screenshot.