No i mean i cant put the video file into vegas, it says it cant recognize it, im talking about x264vfw avi files(and amm2 and amv3, but not that relevant) not h264 mp4s those work just fine. But i think ive exhausted my options with x264 theoretically it should work by now, i may have to reinstall windows to get this working. But in the meantime i have found a workaround. My original problem was that i have a capture card software that is brilliant in every way except it only records with video for windows codecs so i needed one that had decent compression. Now ive settled on CineForm it does the job and my Vegas can work with it.