Using VirtualDub

beau kang · Post by **beau kang** » Thu Sep 29, 2005 12:16 am

I'm trying to compress my video so that I can keep the quality of my amv, but I'm having a slight problem. Mainly, whenever I try to compress the vid in any format, I get a lot of horizontal lines going through my vid. This is mainly because I had to increase the speed on some of the clips that I used in the vid.

If there is a special something that I need to do in order to keep this from happening so that I can produce a better quality vid, please let me know.

Scintilla · Post by **Scintilla** » Thu Sep 29, 2005 12:24 am

If you're using Adobe Premiere 6.5 or lower, right-click on each affected clip, select "Field Options" or whatever it is, and uncheck "Deinterlace when speed is below 100%". Also, make sure your project field order is set to "No fields (progressive)".

This is assuming that you deinterlaced your footage before editing it. If not, it's not too difficult to deinterlace after editing (and before compressing it for distribution) -- VirtualDub(/Mod) has options for deinterlacing, but <a href="http://www.animemusicvideos.org/guides/ ... VISynth</a> has more and better options.

beau kang · Post by **beau kang** » Thu Sep 29, 2005 2:38 pm

Scintilla wrote:If you're using Adobe Premiere 6.5 or lower, right-click on each affected clip, select "Field Options" or whatever it is, and uncheck "Deinterlace when speed is below 100%". Also, make sure your project field order is set to "No fields (progressive)".

This is assuming that you deinterlaced your footage before editing it. If not, it's not too difficult to deinterlace after editing (and before compressing it for distribution) -- VirtualDub(/Mod) has options for deinterlacing, but <a href="http://www.animemusicvideos.org/guides/ ... VISynth</a> has more and better options.

I have already done that for the previous editing of the video, and thank for your help on that as well. This problem is a little different (seeing as how I no longer have the project file). I have the avi that I created from Premiere Pro and it is 1.8 GB. I'm trying to compress that down to lower than 100MB while keeping the quality so that I can display a better video. (It's first one. It's my baby!)

Anyway, I'm loading the avi into VirtualDub and trying to compress it using that, but I keep getting horizontal lines whenever I use anything other than HuffYUV. I tried using HuffYUV but got a much bigger video than my 1.8 GB. I tried DivX and Xvid but still got the same lines.

I hope that helps out a little more. I'd still like to show a better quality video than what looks like I got the clips from a VHS instead of DVD.

Scintilla · Post by **Scintilla** » Thu Sep 29, 2005 4:42 pm

If the lines aren't in your HuffYUV AVI, then they shouldn't be appearing in a DivX/XviD AVI compressed from it. Do you have your codec set to encode interlaced, perhaps?

I'd suggest serving the HuffYUV AVI via AVISynth and looking through the result in VirtualDub(/Mod); if you see the lines then, it should be an easy matter to deinterlace (check the link I posted upthread) and then convert to DivX/XviD (with or without additional filtering and resizing).

beau kang · Post by **beau kang** » Thu Sep 29, 2005 5:06 pm

Scintilla wrote:If the lines aren't in your HuffYUV AVI, then they shouldn't be appearing in a DivX/XviD AVI compressed from it. Do you have your codec set to encode interlaced, perhaps?

I'd suggest serving the HuffYUV AVI via AVISynth and looking through the result in VirtualDub(/Mod); if you see the lines then, it should be an easy matter to deinterlace (check the link I posted upthread) and then convert to DivX/XviD (with or without additional filtering and resizing).

Knowing that I'm going to sound ignorant and retarded (I'm a noob, so I really don't care at this point), but I still don't understand how I should have my script for AVIsynth. I can barely remember if I saved it in PAL or NTSC. Could you give me an example of the script so that I can understand it a little better?

P.S. - Man you sure are on a lot, aren't you Scintilla? Not that I mind, you've been a great help to me

Scintilla · Post by **Scintilla** » Thu Sep 29, 2005 5:23 pm

Well, you'd start with the line:

AVISource("C:\mypath\myfile.avi")
(changing the path and filename as appropriate)

and save that in Notepad with the .AVS extension (remember to change the file type to "All files (*.*)" before saving).

Then open this .AVS file in VirtualDub(/Mod) just as you would a normal AVI (DO NOT use "Open file via AVISynth") and see how it looks.

VirtualDubMod includes a script editor (Ctrl+E) that you can use to make changes and save and refresh on the fly. Very useful feature, really.

beau kang · Post by **beau kang** » Thu Sep 29, 2005 9:20 pm

Scintilla wrote:Well, you'd start with the line:

AVISource("C:\mypath\myfile.avi")
(changing the path and filename as appropriate)

and save that in Notepad with the .AVS extension (remember to change the file type to "All files (*.*)" before saving).

Then open this .AVS file in VirtualDub(/Mod) just as you would a normal AVI (DO NOT use "Open file via AVISynth") and see how it looks.

VirtualDubMod includes a script editor (Ctrl+E) that you can use to make changes and save and refresh on the fly. Very useful feature, really.

I tried out starting with that line of script that you gave me and it gave me an errors that said "couldn't locate a decompressor for fourcc"

Does that mean that my video was saved the wrong way?

Scintilla · Post by **Scintilla** » Thu Sep 29, 2005 9:44 pm

Well, if you can open your video in VirtualDub(/Mod) without AVISynth, then the video itself can't be the problem...

What was the FourCC code given in the error message?

beau kang · Post by **beau kang** » Fri Sep 30, 2005 12:00 am

Scintilla wrote:Well, if you can open your video in VirtualDub(/Mod) without AVISynth, then the video itself can't be the problem...

What was the FourCC code given in the error message?

I'm not getting any error. Does that mean that it's something that the program hasn't encountered before?

Keeper of Hellfire · Post by **Keeper of Hellfire** » Fri Sep 30, 2005 1:49 am

beau kang wrote:I tried out starting with that line of script that you gave me and it gave me an errors that said "couldn't locate a decompressor for fourcc"

You contradict yourself.

Btw, shouldn't be used "DirectShowSource(...)" instead of "AviSource(...)" now?