MENCODER: how to crop 32 lines from up as virtualdub nulltransform crop?

[marcorocchini]

Hi
because of my original .mxf files in SD mode have a signal VTC embedded when I transcode my files I have to crop the vitc lines on image cropping, in virtualdub the first 32 lines from the top



if I would like do this in ffmpeg and mencoder what is the command line to crop 32 lines from the top?

thanks

[poisondeathray]

if I would like do this in ffmpeg and mencoder what is the command line to crop 32 lines from the top?

not sure about mencoder, but in ffmpeg use -vf crop

eg. if you had SD PAL with 32 pixels on top (720x608)

" -vf crop=720:576:0:32 "

EDIT: looks like the same syntax in mencoder
http://www.mplayerhq.hu/DOCS/HTML/en/menc-feat-dvd-mpeg4.html#menc-feat-dvd-mpeg4-crop
http://www.rdeeson.com/weblog/100/scaling-and-cropping-avi-with-mencoder.htm

[marcorocchini]

mmm thanks, and if I would like to do this in avisynth what is the parameter for cropping?

[poisondeathray]

mmm thanks, and if I would like to do this in avisynth what is the parameter for cropping?

Crop(0,32,0,0)

http://avisynth.nl/index.php/Crop

[marcorocchini]

ffvideosource("i:\imx\c0013.mxf" )
crop(0,32,0,0)


seems it works, thanks

[marcorocchini]

but I have a little problem in avisynth: some large .mxf files (generally over 2GB) avisynth return "unseekable"

is there another library to open .mxf files? possibly not directshowsource with lavfilter because possibly I would avoiding the "long and dangerous bridge" of directshow

rather a plugin I can install in avisynth?

thanks

[poisondeathray]

You can try downloading a different ffms2 build, or L-Smash Works 's LWLibavVideoSource()

[marcorocchini]

where I can download L-Smash Works 's?