I’m trying to open an AVI file in VirtualDub but it comes up with an error message saying;
'Couldn’t locate decompressor for format 'FMP4' (unknown)
VirtualDub repuires a Video for Windows (VFW) compatible codec to decompress video. DirectShow codecs, such as those used by Windows Media Player, are not suitable.'
Any idea where to get the codec???? 
see
http://www.moviecodec.com/video-codecs/fmp4-codec-with-virtualdub-45814/
note: if you’re using the 64-bit version of virtualdub, download the 64-bit version of ffdshow-tryouts.
how are you
I need to download this codec
para abrir videos em avi