Does anyone know the proper technique for doing this? I've got an ASF file that tries to open series of webpages (the explorer windows for which inevitably obscure the video) in a style similar to ...

I am new in this video conversion field. When I tried to use VirtualDub 1.3c to convert some .asf files. It said something like "the file is for example 123, but was 234 when encoded, it may be ...