For instance, NVEnc enables you to set the output codec and the encoder preset and there are various other parameters to deal with here. You can also define the number of consecutive B frames and choose specific output formats for the resulting file and the encoded audio. NVEnc also brings to the table cuvid decoding capabilities, as well as muxing and demuxing functionality, based on libavformat and high-performance filtering. The command line version of NVEnc supports transcoding, but the application also comes as a plugin for Avi utl.
