To explain a 'Four CC' changer ?

[Rommyke]

HI ,

Can something explain me what a FOUR CC changer does ??
Does it change an Xvid movie to a Divx movie ?

thanks !

[Teegedeck]

Nope, you only change the decoder that's being called when opening the file (if you haven't set the same decoder for both old and new fourcc).

If you call a decoder that can't decode the content you'll see that it can't change DivX3.11 files to XviD files for example - because what decompression scheme is required is determined by the bitstream, not by its header or info in its container.

Foucc-changers only make sense because there are several different MPEG-4 encoders (XviD, ffmpeg, DivX, 3ivx...) whose decoders should be compatible with each other.