libavcodec has changed the API again; presets need change

I am currently investigating the issue for Debian sid and Ubuntu Oneiric.

Several changes need to be made, but I am not 100% sure how.

- All the crop options have been removed. Use -vf crop=width:height:x:y instead.

  eg: I think -cropleft 52 -cropright 54 should become  -vf crop=in_w-52-54:in_h:((in_w+out_w)/2)+1 but I want someone to confirm (or should it be -1).

- All the pad options have been removed. Use -vf pad=width:height:x:y:color 
instead.

  eg. I think -padtop 6 -padbottom 6 should become -vf pad=in_w+12 but again, I want someone to confirm.

- -maxrate values should be listed as k and not kb

- +4mv needs to be replaces by something, but I don't know what yet.

Original issue reported on code.google.com by poipodec...@hotmail.com on 7 Oct 2011 at 5:27

Merged into: #131

ohei / winff

libavcodec has changed the API again; presets need change #135