cannot load nvcuda.dll about ffmpeg-cpp

[driesj]

This is because I had outputVideoCodec set as "H264", which only works with Nvidia hardware. changing to VP9 or NONE made it work.

[Raveler]

Right, thanks! This is because the H264 encoder of ffmpeg internally uses nvenc, which is a hardware-based encoder available in nVidia GPU's.

It is very easy to write a Codec that will use libx264 (the software encoder) instead. Just edit H264NVEncCodec.cpp line 7 and replace "h264_nvenc" with "libx264". Better yet, you should probably just make a new class for that codec. You also need to make sure you set a valid preset, since the default preset used in demo.cpp is "hq", which is not supported by libx264. If you run the example after changing the codec to libx264, it will give a nice error with all available legal presets.

[driesj]

Thanks, this works very well!