I hve a client who handed me a Camtasia AVI. After installing the TSCC codec, the file plays on VLC, etc., but Vegas still doesn't recognize it. Any help?
Looks like it's a 64bit issue - it plays in Vegas 32 bit...
I seem to remember reading that VLC has it's own built in codec set (which is why I found it could play some old mjpeg video I had that no other codecs were able to handle (from Rainbow Runner)) so using VLC as a test to see if the codecs are installed in your system may not be valid.
My suggestion would be to download a trial version of another NLE, suggest Movieplus from serif.com. Open AVI in this program, then save / export file to an AVI for opening in Vegas.
Not a particularly elegant solution & I'm sure others on the forum can suggest other software to efficiently resale into a workable loss less format, but that's what I would do.