"What do you mean by many megabytes?" I am refering to the quicktime runtime dlls, if a codec size has several MB it means that is very badly done and very slow. You only need codec.acm or codec.dll and if its size if bigger than 500K something is wrong with the codec. I have the movie in msvideo1 format with 100% of quality and the sound in pcm format, the size is about 200M. I can compress the video alone or the sound alone, but if I try to compress both the resulting video crash the video player. If I can compress the video or the sound alone it means that the codecs are working, so the problem is with the video editor when it assembles the compressed video and audio into the avi file. I have experimented several video editors with the same result, so the problem must be in some buggy old version windows dll that is called by the video editor.

Stupidity also evolves!