Clip Frame in Tmpgenc

What exactly does Mask top, bottom etc etc do exactly?

If I clip part of a video file and mask what I cliped, I get exactly the same output after encoding as if I just clipped the video and encoded??

Help

[sterno]

Clipping cuts the edges off, changing the dimensions of the video. Masking cuts the edges off but replaces them with a color (defaults to pure black), leaving the dimensions unchanged. If you mask edges out instead of clipping them you won't screw up the aspect ratio if you're encoding to VCD/SVCD.

Thats exactly what I thought the masking did but I tried a couple of test encodes ,one with masking on & one with masking off, the resulting Mpegs were both the same?? so I was a little confused.

Thanks for the reply

Cheers

[ralfbeckers]

Well, I haven't done it in a long time but clipping without masking only makes sense if you have a letterboxed source (such as from a camcorder that does not support anamorphic widescreen) and want to produce an anamorphic (S)VCD to preserve quality and/or supress scan line visibility on the CRT. Since anamorphic encoding does expand the picture by the factor of 1.33333 on the vertical axis you should only clip 12.5 % of the total number of vertical pixels even if that leaves a small black part remaining on 2.35 : 1 movies.