virtualdub question

[zak_swan]

i applied a filter to an avi on virtualdub, then saved it as avi using same codec. XVID Mpeg-4.
however the output file is about a third smaller than source.
this is my first time using virtualdub so i'm a bit of a newbie with it.
any suggestions?

[redwudz]

The codec was probably at the default settings while the original video was done at higher quality settings would be my guess, with all other things being equal.

[zak_swan]

so with virtualdub how would u save avi exactly the same as source?
is there an easy way or do u just have to choose from video> compression, select video compression

[redwudz]

In my version, there is a 'Target Quantizer' calculator. It's a bitrate calculator. You could set that to the size of the original file.

The most important part; Is the finished video as good a quality as the original? If not, you would want to tweak the codec. Also you can go to http://www.xvid.org/ for information.

I admit I usually set the codec at default as the XVID's I filter are generally poor quality and end up being larger. The end size could also be influenced by the filtering, depending on what you are doing.

I think the Doom9 site may have some good info on XVID, also.

[zak_swan]

thank u.