ffmpeg压缩视频，调用显卡

ffmpeg.sh

ffmpeg  -hwaccel cuvid -i meeting.mp4 -c:v h264_nvenc  -crf 24 meeting_compressed.mp4

ffmpeg2.bat

ffmpeg -y -vsync 0 -hwaccel cuvid -i a.MOV -c:v h264_nvenc -b:v 2M -vf scale_cuda=format=yuv420p a.mp4

ffmpeg3.sh

ffmpeg -i input.m4v -map_metadata 0 -metadata:s:v rotate="180" -codec copy output.m4v

ffmpeg720.bat

@echo off
pushd "%~dp0"

for %%I in (%*) do (
    ffmpeg -y  -hwaccel cuvid -i "%%~fI" -c:v h264_nvenc -b:v 2M -vf scale_cuda=-2:720:format=yuv420p,fps=30  "%%~dpnI_c.mp4"
)

pause

ffmpeg_newversion.bat

@echo off
pushd "%~dp0"

for %%I in (%*) do (
    ffmpeg -y -hwaccel cuvid  -hwaccel_output_format cuda -noautorotate -i "%%~fI" -c:v h264_nvenc -b:v 4M -vf scale_cuda=format=yuv420p "%%~dpnI_c.mp4"
)

ffmpegit.bat

@echo off
pushd "%~dp0"

for %%I in (%*) do (
    ffmpeg -y -vsync 0 -hwaccel cuvid -i "%%~fI" -c:v h264_nvenc -b:v 3M -vf scale_cuda=format=yuv420p "%%~dpnI_c.mp4"
)

ffmpegit2.bat

@echo off
pushd "%~dp0"

for %%I in (%*) do (
    ffmpeg -y -vsync 0 -hwaccel cuvid   -hwaccel_output_format cuda -noautorotate -i "%%~fI" -c:v h264_nvenc -b:v 3M -vf scale_cuda=format=yuv420p  -filter:v fps=30 "%%~dpnI_c.mp4"
)

https://superuser.com/questions/1663872/cant-convert-with-ffmpeg-using-nvenc-10-bit-encode-not-supported
解决 Provided device doesn't support required NVENC features

ffmpeg下载（建议下载master full版本）：
https://www.gyan.dev/ffmpeg/builds/
另外需要一块NVIDIA显卡，升级到最新驱动