Here is the problem, I edited video in vegas, source is codet in H264 so I used VFAPI and avisynth to get it in the vegas. Everything was fine but recently when I load the project and start edit vegas freeze. For decoding h264 I use coreAVC with CUDA acceleration.
When I changed decoder to libavcodec problem is solved. But still I would like to know what caused the problem with coreAVC and why it was so sudden.



