ffmpeg h264 encdoer 速度對比

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

雖然 nvenc 速度最快 但需要以下硬件要求 經測試 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