顯示攝像頭裝置号
ffmpeg -list_devices true -f "avfoundation" -i ""
x264編碼(軟編)
ffmpeg -f avfoundation -framerate 30 -pix_fmt nv12 -s 1280x720 -i "0" -c:v libx264 -b:v 20000000 -preset ultrafast -tune zerolatency -y gaoliwen1.ts
cpu使用率如下
videotoolbox編碼(gpu硬編)
ffmpeg -f avfoundation -framerate 30 -pix_fmt nv12 -s 1280x720 -i "0" -c:v h264_videotoolbox -b:v 20000000 -preset ultrafast -tune zerolatency -y gaoliwen1.ts
cpu使用率如下