FFmpeg to RTMP

FFmpeg to RTMP

Nvidia GPU to ffmpeg for RTMP with nginx 1.22.0 + Ubuntu MATE 22.04.2
# https://www.elpamsoft.com/?p=Plex-Hardware-Transcoding

### Build

Install NVIDIA CUDA Toolkit here for Linux/Ubuntu however Debain will use the same commands.
https://developer.nvidia.com/cuda-downloads?target_os=Linux&target_arch=x86_64

Compile ffmpeg for CUDA
https://docs.nvidia.com/video-technologies/video-codec-sdk/ffmpeg-with-nvidia-gpu/index.html#compiling-for-linux

cd to NGINX source directory & run this:
    sudo apt-get update -qq && sudo apt-get -y install git openssl
    git clone https://github.com/arut/nginx-rtmp-module
    git clone https://github.com/arut/nginx-ts-module
    ./configure --add-module=nginx-rtmp-module --nginx-ts-module --with-http_ssl_module
    make
    make install
    
### Steam

Stream your file via RTMP with you NVIDA GPU and leave the CPU to do only Audio (AAC) what is VERY little CPU used.
`ffmpeg -re -i INPUT -c:v h264_nvenc -c:a aac -b:a 96k -tune zerolatency -f flv rtmp://SERVERIP/live/ARBITRARY_NAME`

Limit speed by 10Mb per sec (9904 Kb for Video / 96 Kb for Audio = 10000 Kb (https://www.gbmb.org/mb-to-kb ffmpeg reads them in in decimal 
`ffmpeg -re -i INPUT -c:a aac -b:a 96k -c:v h264_nvenc -b:v 9904k -tune zerolatency -f flv rtmp://SERVERIP/live/ARBITRARY_NAME`

ffmpeg_dash.sh 
`ffmpeg -re -i INPUT -c:v h264_nvenc -tune zerolatency -f dash ARBITRARY_NAME.mpd`

nginx.conf

}

# RTMP configuration
rtmp_auto_push on;
rtmp_auto_push_reconnect 1s;

rtmp {
    server {
        listen 1935;
        chunk_size 4000;
        application live {
            # enable live streaming
            live on;
        }
    }
}