Crop in VirtualDub or Tmpgenc

[kenmo]

I capture my avi's with VirtualVCR and then I edit out commercials with VirtualDub, then frameserver to Tmpgenc.

I do crop the bottom & top to get rid of the vcr head noise. Which would give me the better performance, cropping with Tmpgenc or with VirtualDub while frameserving.

Thanks

[KingJohn]

Why not try both ?

[SatStorm]

It is better with TMPGenc
Also use "full Screen (keep aspect ratio 2)" for this

[sterno]

I crop and mask the edge to keep the original resolution, and I always do it in tmpgenc because it requires slightly less effort to do both than it does in virtualdub.

[banjazzer]

I think using Virtualdub may be quicker. However, if time is not a consideration TMPG is probably easier, as the last poster said.

[SatStorm]

Cropping with TMPGenc makes sure that no data gonna waste to the cropped area.

[kenmo]

SatStorm,

"It is better with TMPGenc
Also use "full Screen (keep aspect ratio 2)" for this"

Can you please explain what keep aspect ratio 2 does. I've been using keep aspect ratio.

Thanks

[kenmo]

Sterno ;

"I crop and mask the edge to keep the original resolution, and I always do it in tmpgenc because it requires slightly less effort to do both than it does in virtualdub"

How much do you crop the top, bottom and sides by ?

Thanks

[sterno]

How much do you crop the top, bottom and sides by ?

It depends on the material and the resolution I used for the capture. For VHS captured at 480x480 or 352x480 capture I usually crop out 5-7 pixels all the way around.

[banjazzer]

If you crop in TMPG the aspect ratio will be maintained whatever you do. Just crop out what you don't want. 8) It works differently to Vdub.

[SatStorm]

@banjazzer
No, it doesn't "always". Because you use certain type of source, and works always for you, doesn't mean that it is "always" for everyone.
IF you work with interlace source and interlace output, problems some times occur if you use full Screen (keep aspect ratio).
For example: Grabb from a VHS and crop bottom/line left/right. Why to crop? Because: You don't need the bottom lines (distortion) and Top/left/right may include blank space (typical). So, you want to crop this, center the picture and encode only the active screen. It is wise, quality saver and also -in extreme situations- you can lower the bitrate to fit more on a CD with the same quality (if the filesize matters)
The difference between full Screen (keep aspect ratio) and full Screen (keep aspect ratio 2) is simply. The second one ALWAYS don't resize anything. Just centers the picture IF it is neccessary. With full Screen (keep aspect ratio) IF the output can be maximized, it will be. And that creates Interlace problems.

It is not only this: The input aspect sometimes must change also, even if TMPGenc set it automaticly to an encoding position. But those are advance stuff, for other time!

[banjazzer]

The point I was making is that TMPG and Vdub work differently when cropping.

With Vdub you crop, and then (almost always) need to resize. With TMPG you only crop, without the need to resize.

This is not to say that you can't screw up the aspect ratio by doing something else, only that they work differently, and there is no need to resize with TMPG.

Perhaps the words "whatever you do" were ill-advised, because people do some weird things.

[SatStorm]

Yes, fair enough.
The question was "Crop in VirtualDub or Tmpgenc"
And I answer that is better with TMPGenc. I already post those reasons.
Cropping with Vdub it is also OK, but if you want to proccess your video and save it to another avi. For frameserving, ain't good.

Also, I check UK DVDs I own (about 15). Only one of them was progressive. Probably we shopping different kind of movies! What to say

[banjazzer]

Also, I check UK DVDs I own (about 15). Only one of them was progressive. Probably we shopping different kind of movies! What to say

That's very strange. At a rough estimate I have encoded around 230 PAL DVDs. Only about a dozen have been interlaced, and of that dozen just 2 (old) movies, and the rest derived from TV programmes.

I presume you mean genuinely interlaced, because I find DVD2AVI indicates most progressive DVDs as being interlaced even when they are not?

[SatStorm]

I frameserve with dvd2avi to tmpgenc. Then, I go to the de-interlace filter, browse the file and see if it has interlace artifacts. All they have!
Hmmmm.....