Using x64 emulator (might be same issue with x32) I get these messages in the log after running any B4x thing from the debooger.
LoadLibrary "nvcuda.dll" failed!
LoadLibrary "nvcuda.dll" failed!
LoadLibrary "nvcuda.dll" failed!
Failed to call cuInit, cannot use nvidia cuvid decoder for h264 stream
[h264 @ 0000026179FA5500] no frame!
[h264 @ 0000026179FA5500] no frame!
LoadLibrary "nvcuda.dll" failed!
LoadLibrary "nvcuda.dll" failed!
LoadLibrary "nvcuda.dll" failed!
Failed to call cuInit, cannot use nvidia cuvid decoder for h264 stream
[h264 @ 0000026179FA5500] no frame!
[h264 @ 0000026179FA5500] no frame!