@Kurtnoise:
- x264 wasn't used directly because I disabled the 'use internal decoder if possible' in Hybrid (+ last time I check using x264 directly didn't give any speed boost with slow scripts)
- ffmpeg wasn't used as encoder, since a. I hate the ffmpeg libx264 syntax (since I always mess it up) and b. I normally use 64bit ffmpeg but 32bit Avisynth since 64bit Avisynth is far from stable over here
@neuron2: seems like the problem was the fault of mp4box and is fixed now
