Cropping

[iMacfan]

Hi,

I'm trying to crop a video that I am converting from .VOB to mpeg. This is to get rid of the black bars top and bottom from the widescreen film. I use ffmpeg, and put 35 in the first two boxes in the crop options, but this does not seem to do anything. Do I need to reduce the output size by the relative dimensions, or what? By the way, as I need a CBR output, and so then need to re-encode in mpeg2enc, will this reduce the overall quality, even though I will encode at a high bitrate to start, and a much lower one for the final file (it's for a PDA).

Thanks for any help,

David


EDIT: OK, I've now read Wiseman's manual , and it seems like the cropping is not supported for mpeg1 at all (which is OK as I would have had to re-encode to CBR anyhow). Is this the case? If so, which format do you recommend I encode into in the first step so that I get the best final result? (please bear in mind that I don't have QT pro)

[major]

Hi, I'm trying to crop a video..put 35 in the first two boxes in the crop options, but this does not seem to do anything.

Use a value divisible by 2.

Do I need to reduce the output size by the relative dimensions, or what? By the way, as I need a CBR output, and so then need to re-encode in mpeg2enc, will this reduce the overall quality, even though I will encode at a high bitrate to start, and a much lower one for the final file (it's for a PDA).

Why you don't immediately use mpeg2enc then, it already has a "Letterbox" option to crop.

OK, I've now read Wiseman's manual , and it seems like the cropping is not supported for mpeg1 at all

No, that manual is for an extremely old version. The manual is here:
http://homepage.mac.com/major4

[iMacfan]

Hi

I'm actually tring to get rid of the black bars, top and bottom - will the letterbox option do this. I thought that it added them?

Thanks