FFmpeg NVIDIA NVENC -b_ref_mode

NVIDIA NVENC -b_ref_mode 確認

ffmpeg -i input.mp4 -c:v hevc_nvenc -b_ref_mode 2 out.mp4


https://developer.nvidia.com/video-encode-decode-gpu-support-matrix


GTX1650 TU117 HEVC B Frame support なし
-b_ref_mode 1  エラー あり
Each B frame as referencd is not supported

-b_ref_mode 2  エラー あり
Each B frame as referencd is not supported

GTX1660 TU116 HEVC B Frame support あり
-b_ref_mode 1  エラー
Each B frame as referencd is not supported
-b_ref_mode 2  エラーなし

GTX1660TI TU116 HEVC B Frame support あり
-b_ref_mode 1  エラーあり
Each B frame as referencd is not supported

-b_ref_mode 2  エラーなし

参考
ffmpeg -encoders | find "NVIDIA"

hevc_nvenc AVOptions: 確認
ffmpeg -h encoder=hevc_nvenc



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