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It may be useful to replace dirty border by clean one (VHS capture for example) This filter replaces border(s) of video by pure black.

It is important as 4/3 has non square pixel (different for PAL and NTSC) and if you do 1:1 -> 1:1 you will end up with distorted image. If you do DVD2Divx for example, source is 4/3 or 16/9 and destination is 1:1. Lanczos : Hard to describe, very sharp.Bicubic : Keep sharpness, harder to encode (for example leads more easily to macroblocking in SVCD).Bilinear : Smooth a bit but easier to encode.You can direcly enter the new width/height and the resize algorithm or use the slider and the menu. The filter dialog config box is the same for both filters : Mplayer resize is a port of Michael Niedermayer resize filter, which is used in mplayerĪvisynth resize is slightly more accurate, but mplayer resize is 3x faster without any perceptible difference. The resize filter is a port to YV12 of avisynth resize filter. It won't work very well on a noisy source (capture) On a clean video (dvd), you can try the Autocrop button. You can preview the part that will be cropped using the Apply button. The cropped value left/right/top/bottom must be even. This filter crops the video (for example to remove black border). This set of filters deeply alter the source video : Resize, rotate, flip and crop.