Conversion 16:9 to 4:3 format

[alfa1234]

How can I do the above from a complete dvd film?Thanks

[DJRumpy]

Use the CROP function in either VirtualDub, or AVISynth. You'll need to crop the width of your video, to a 4:3 aspect ratio. Since your video is already widescreen, you will need to chop off the left and the right sides of your video to get a fullscreen version.

To get the amount to crop, multiply your video height, by 1.33 (4:3 aspect ratio). 4/3 = 1.33

Example: if your movie source is 720x480

480 * 1.33 = 638

720 - 638 = 82

We're removing 82 from our total width of 720. The easiest method is to take an equal amount from the left and right of your video. Divide 82 by 2 to get that amount.
Use the CROP function in VirtualDub, or AVISynth to remove 41 pixels from the left and 41 pixels from the right of your movie (your essentially chopping out everything but the middle).

One should ask, why would you want to butcher a movie this way?

[alfa1234]

Thank you very much

[Barnabas]

TMPGenc can also do this. There is a guide on the forum some place about this.

[solarfox]

Believe it or not, some people just adamantly refuse to watch a picture that "doesn't fill the whole screen." They think that the black bars somehow mean they're "not seeing the whole picture", and either cannot or will not grasp the concept of letterboxed widescreen no matter how many times you try to explain it to them.

One of my fellow cubicle dwellers has a wife who's this way. He buys movies on DVD and she will actually insist, whenever it turns out to be a widescreen version, that something must be wrong with the disc and he should take it back to get one that "works right."

To address the original poster's question: Yes, cropping will work, but the result is probably not going to be very good. The filters mentioned will just indiscriminately slice off the ends of the frame to make it fit, without regard to what's going on in the scene at the time; you're likely to end up with a lot of scenes of people holding conversations with empty air (since the other people in the scene have been chopped out), important events occurring out of frame, and movies that are "oduced b ven Spielb and orge Luca".