Cropping an Avi Video

[Rata]

Hello, this is my first post her so i hope i get everything right.

My question is regarding an Avi file that I have. I need; or rather want to crop space from the top of the file and from the bottom BUT I would rather not change the aspect or the resolution.

The file is a widescreen video that was ripped to the computer to include the black or rather part of the black bars common to widescreen that came with the original source, due to this whenever I attempt to watch it on my television or on my computer monitor I first get a couple inches of blurry grey-black bar (from the original source file), and following that a small, hard, sharp black that my media player makes, it's two different set of blacks, and on the screen it's not a very aesthetic view. Its nitpicking I know but I rather figure this out now rather than later.

My question is, is there a way to crop the file without resorting to a re-encode? Or is there a way to re-encode and to retain exactly or almost exactly the same bitrates and file info. I’m rather uninformed has to how go about it. From the cropping to the encoding, and as a first (and easier) option I would prefer a method that doesn’t change the video quality.

Granted I don’t know much about this subject I suppose if the only method available DOES involve the change in quality I will do just that.

Here's the stuff G-Spot spat at me.



...you can't see it, but the video is 720X400 resolution.

If any body here would like to help with this problem I would appreciate it very much.

Muchas gracias.

[ZiGGY909]

Hi there, welcome

Open the avi file in VirtualDub and go to:
Video / Filters / Add / Null Transform / Press [OK] / Cropping.

Now move those sliders up OR down to where you want to crop, basically what you see here is what you get.

Obvoisly you'll have to re-encode the file, but this is easy...

Select Compression under the video menu. Choose your codec, in your case you would select Divx Codec.

now you can confiqure your output video settings... when done choose ok to everything & then go to File>Save as AVI.

[tigerman8u]

and if you want to bring it back to the same resolution it was before cropping click on Video / Filters / Add / Resize and put in the resolution you want. Do not use nearest neighbor when resizing. Bicubic is good to use

[Mister Flonk-Flonk]

You can do it with an AVS script as well...

AviSource("clip.avi")
Crop(10,10,-10,-10)
AddBorders(10,10,10,10)

Replace values with your own, of course.

[Mister Flonk-Flonk]

AviSource("clip.avi")
Crop(10,10,-10,-10)
LanczosResize(720,480)

This is the same as above, but resizing the frame rather than adding a border. Doing this can skew your aspect ratios though.

[Rata]

Thank you very much to everybody who replied. It was a fast and very helpful. The method ZIGGY909 mentions worked best.

I really appreciate the help.

[celtic_druid]

Depends on what you mean by best.

It might have been easier, but the other would be faster and result in better quality since it doesn't involve converting to RGB24.

[BJ_M]

except if he used v-dub 1.6x right ?

YUV formats can now be directly selected for decompression and compression.

without conversion to rgb first ....

i have not checked this myself ..

[celtic_druid]

Pretty sure that the filters still only process RGB24.