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View Full Version : Need help with Letterbox to Anamorphic conversion


mklein49
29th November 2002, 10:10
I'm pretty much a newbie and need a little help. I'd like to convert a dvd that's a 4:3 letterbox to 16:9 anamorphic. I'm not really sure how to go about this. Here's what I thought: create a dvd2avi project, then create an avisynth script to crop and resize the video, and reencode with whatever.

Does this seem somewhat right? Also, could give some advice and the avisynth script, it should be pretty simple right?

Thanks

jdobbs
29th November 2002, 20:36
Here are some AVISYNTH example scripts that will do it -- be careful and only to this with 4:3 letterbox source or you could lose the top/bottom of a picture... and of course replace the paths with the actuals. I'm also assuming you are reading from an MPEG-2 VOB source , adjust as necessary.

You should always use BicubicResize when doing this type of conversion because it does a better job of enlarging picture areas. The "ResampleAudio" is there to fix a well known bug, get rid of it if you're not using CCE.

NTSC:

LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
mpeg2source("d:\image\vobs\MYFILE.d2v")
BicubicResize(720,640)
crop(0,80,720,480)
ResampleAudio(44100)

or here is a more difficult to understand but slightly faster version

LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
mpeg2source("d:\image\vobs\MYFILE.d2v")
BicubicResize(720,480,1/3,1/3,0,60,720,360)
ResampleAudio(44100)


PAL:

LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
mpeg2source("d:\image\vobs\MYFILE.d2v")
BicubicResize(720,768)
crop(0,96,720,576)
ResampleAudio(44100)