How do you get rid of borders?

[zanos]

I downloaded an avi that has huge borders around the video. I've tried using some virtualdub filters to resize it but I have no idea what I'm doing. Everything I've done either has no effect or it makes it worse. Can anyone help?

[CaZeek]

You can crop the video in VDub.. if you don't want to use any other filters just use the null transform filter and then select cropping and just clip off the borders. I'm not sure if there's a way to do this without really re-encoding though.

[Baldrick]

are you going to make new avi from it?
under video->filters add the nulltransform filter
click on the cropping button
crop the video
select video->compression and select a codec, divx,xvid or something
select audio->direct stream copy
select file->save avi.
done.


(i'm tooooooo slow )

[zanos]

thanks guys. That worked but when I choose xvid as my compression the program crashes. When i choose other codecs for some reason the video doesn't come out right.

[CaZeek]

Maybe your XVid codec is corrupt? You could try re-downloading/installing it. I personally think DivX5.1 is the best for that kind of compression anyway, but that's of course very debatable.

[junkmalle]

Xvid is not supposed to have image size limitations but I always stick with a multiple of 8 or 16. For example use 640x368 rather than 641x365.

[zanos]

Yeah I think it may in fact be corrupt. Probably have to download a new one.

[celtic_druid]

You can't encode 641x365 with XviD, YV12 can't handle it. Pretty sure that it can handle mod4 ok though. As said best to stick with mod16.

VDub filtering requires that you convert to RGB24. So YV12-->RGB-->YV12. You would be better off using AVISynth.
avisource("whatever.avi").crop(left,top,-right,-bottom)

However re-encoding will cause a loss of quality no matter what you do as long as you use a lossy codec like XviD.

[Fking]

this works only when "full processing mode" is selected, right?

one questions, i have avi's compressed with divx5 which i want to crop, but don't want to lose quality again.
How i can recompress it with the same settings?

[junkmalle]

this works only when "full processing mode" is selected, right?

one questions, i have avi's compressed with divx5 which i want to crop, but don't want to lose quality again.
How i can recompress it with the same settings?

Yes, full processing mode is required. All filtering is turned off if you use Direct Stream Copy.

If you shoot for the same file size as the original (or a little bit larger) with a 2 pass variable bitrate you'll probably be safe. Or use Xvid and Quantization mode (constant quality) to do the job in a single pass.