官方关于ffmepg的网页
https://developer.nvidia.com/FFmpeg
下载驱动
https://www.nvidia.com/drivers
下载CUDA
https://developer.nvidia.com/cuda-downloads
下载ffmpeg
http://www.ffmpeg.org/download.html
安装ffnvcodec
git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git cd nv-codec-headers make && sudo make install
编译ffmpeg
cd ffmpeg-4.0.2 ./configure --disable-asm --disable-x86asm \ --enable-cuda --enable-cuvid --enable-nvenc \ --enable-nonfree --enable-libnpp \ --extra-cflags=-I/usr/local/cuda/include \ --extra-cflags=-fPIC --extra-ldflags=-L/usr/local/cuda/lib64 # --enable-shared --enable-pic make -j8 sudo make install
验证
退出当前终端，重新进入一个，输入命令：
ffmpeg -decoders | grep h264
输出的第一行，应该是：ffmpeg version 4.0.2
VFS..D h264 H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
V..... h264_v4l2m2m V4L2 mem2mem H.264 decoder wrapper (codec h264)
V..... h264_cuvid Nvidia CUVID H264 decoder (codec h264)
ffmpeg -encoders | grep nv
V..... h264_nvenc NVIDIA NVENC H.264 encoder (codec h264)
V..... h264_v4l2m2m V4L2 mem2mem H.264 encoder wrapper (codec h264)
V..... nvenc NVIDIA NVENC H.264 encoder (codec h264)
V..... nvenc_h264 NVIDIA NVENC H.264 encoder (codec h264)
测试
ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -vsync 0 -i 2018.MOV -vcodec h264_nvenc -preset slow -b:v 2000k 2017.h264
注意，这里的preset参数，有的不能用了。
出错及解决办法
吾电脑提示要加上--disable-x86asm参数。
configure时出错，提示：
ERROR: cuda requested, but not all dependencies are satisfied: ffnvcodec
解决办法：
git clone https://git.videolan.org/git/ffmpeg/nv-codec-headers.git cd nv-codec-headers make && sudo make install
