Cropping to 720x304, then resizing to 720x304

[JimmyBarnes]

Suppose I have an AVI 720x544 with big black bars top and bottom.

In VDubMod, I resize to 720x304 after cropping 120 pixels each top and bottom (cropped result is also 720x304).

So essentially there is no resizing to be done, but I have to use some method say Bicubic.

In a situation like this where one is really only wanting to crop off the black bars, is there any way to avoid reprocessing the wanted part of the frame and thus compromise quality?

thanx

JB

[setarip_old]

Hi!

Cropping requires reprocessing.

However, if your only need is viewing, I believe there are several players that can create the desired viewing effect "on the fly"...

[CWR03]

Any cropping in VirtualDubMod will require reprocessing. You can create an .avs file with your cropping settings, then open that file with most media players to view the file without any changes made to quality at all.

[shakey]

also there is a "null" filter you can use instead of resize. This lets you do the cropping without having to do the resize processing (although the start and end sizes are the same, the filter still takes up processing time).

Or play in a player that can do on the fly cropping, but you might have to manually set the cropping every time you play the file.

[JimmyBarnes]

also there is a "null" filter you can use instead of resize. This lets you do the cropping without having to do the resize processing (although the start and end sizes are the same, the filter still takes up processing time).

That's seems to be what I am after though I still have to use XviD 2-pass compression (target set to same size as original video stream) so I wonder how that affects quality??

[CWR03]

Any re-encoding affects quality. Why not return to your source material and re-encode at the proper resolution?

[JimmyBarnes]

Any re-encoding affects quality. Why not return to your source material and re-encode at the proper resolution?

If I could do that, I would not be asking here...

[Guest]

Where'd you get the source files and what is their content?

[JimmyBarnes]

Where'd you get the source files and what is their content?

As per the original question, it's purely hypothetical..