Encoding or cropping only a certain region of a video.

[dewild1]

Hi.
OK, I have a few videos that I only want to play certain parts...
Lets say the video is 320X240.
I only want the middle part. Part on top and part on bottom, I do not want.
I understand cropping but that only blacks the top and bottom.. I want to basically turn the 320X240 into very wide but not very tall video but without stretching it, just cutting the top and bottom..

I can do it with Microsoft Media Encoder, and the capture Desktop and only selecting the region I want, but that sucks. It comes out 4 times bigger and crappy quality..



Is there any free or paid for software that does this.

[Midzuki]

Avisynth!

[redwudz]

What format is it? AVI type files, you can do that easily with the cropping function in VirtualDub or VD Mod filters. Just subtract your new vertical size from the existing size, divide by two and move the crop down that amount, top and bottom. Do the same with the horizontal.

But you will have to output as a AVI type file. Or you could frameserve it to a MPEG encoder to eliminate the in-between file.

EDIT: Or as Midzuki mentioned, Avisynth. Better especially if you need to do this more than once.

[dewild1]

Thank you both very much. I will try it out now!

[sumeshkri]

i have got to resolve the same problem. i want to cut the top and bottom of my mpeg1 video.
the video is something i captured from a tv show. it has textual advertisements as stripe at the bottom and the logo on top. what do you suggest?plz....
thanks

[manono]

I saw your thread about the same thing elsewhere. You can remove the logos (or come close) using the DeLogo filter. You can crop them out following the suggestions earlier in this thread and either frameserve to an MPG encoder via VDub or convert directly to AVI. Or use AviSynth (much better) to do the frameserving. MPG presents it's own set of problems, though. If this is for DVD or VCD, for example, cropping won't be enough. You'll also have to resize them. And since you don't know anything about video encoding, my suggestion is to forget about it and learn to love logos.

[redwudz]

sumeshkri, another option might be black bars to cover the logos and forget the resizing and even more quality loss when you re-encode. VD Mod can also do that, but with the same problem, AVI type output only. But avoiding resizing may help the quality loss when you re-encode.

But you can experiment with both methods. With TV quality as a source, it may look terrible either way, though.

[sumeshkri]

thanks a lot for the suggstions. i note the point about quality loss . i prefer to have the ads on than to loss the little quality i have with those videos captured from tv show. thanks.