h264_qsv frame= 250 fps=0.0 q=-0.0 Lsize= 1401kB time=00:00:10.00 bitrate=1146.8kbits/s speed= 14x
libopenh264 frame= 250 fps=0.0 q=-0.0 Lsize= 538kB time=00:00:10.00 bitrate= 440.1kbits/s speed=11.7x
libx264 frame= 250 fps=132 q=-1.0 Lsize= 516kB time=00:00:10.00 bitrate= 422.5kbits/s speed=5.27x
dxva2 frame= 250 fps=129 q=-1.0 Lsize= 516kB time=00:00:10.00 bitrate= 422.5kbits/s speed=5.17x
虽然 nvenc 速度最快 但需要以下硬件要求 经测试 nvenc 和 qsv 的平均性能是相差不多
System Requirements for NVIDIA NVENC H.265/HEVC acceleration
Desktop PC: NVIDIA GeForce GTX 950 or higher
Laptop: NVIDIA GeForce GTX 965M or higher
NVIDIA GPU driver R358 or above
