nvenc_config.h

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#pragma once
 
namespace nvenc {
 
  enum class nvenc_two_pass {
    disabled,  
    quarter_resolution,  
    full_resolution,  
  };
 
  enum class nvenc_split_frame_encoding {
    disabled,  
    driver_decides,  
    force_enabled,  
  };
 
  struct nvenc_config {
    // Quality preset from 1 to 7, higher is slower
    int quality_preset = 1;
 
    // Use optional preliminary pass for better motion vectors, bitrate distribution and stricter VBV(HRD), uses CUDA cores
    nvenc_two_pass two_pass = nvenc_two_pass::quarter_resolution;
 
    // Percentage increase of VBV/HRD from the default single frame, allows low-latency variable bitrate
    int vbv_percentage_increase = 0;
 
    // Improves fades compression, uses CUDA cores
    bool weighted_prediction = false;
 
    // Allocate more bitrate to flat regions since they're visually more perceptible, uses CUDA cores
    bool adaptive_quantization = false;
 
    // Don't use QP below certain value, limits peak image quality to save bitrate
    bool enable_min_qp = false;
 
    // Min QP value for H.264 when enable_min_qp is selected
    unsigned min_qp_h264 = 19;
 
    // Min QP value for HEVC when enable_min_qp is selected
    unsigned min_qp_hevc = 23;
 
    // Min QP value for AV1 when enable_min_qp is selected
    unsigned min_qp_av1 = 23;
 
    // Use CAVLC entropy coding in H.264 instead of CABAC, not relevant and here for historical reasons
    bool h264_cavlc = false;
 
    // Add filler data to encoded frames to stay at target bitrate, mainly for testing
    bool insert_filler_data = false;
 
    // Enable split-frame encoding if the gpu has multiple NVENC hardware clusters
    nvenc_split_frame_encoding split_frame_encoding = nvenc_split_frame_encoding::driver_decides;
  };
 
}  // namespace nvenc