linux/docs/rffmpeg/Master-Install.md

Prerequisites:

• A running jellyfin server on the master

Step 1: Configuring Jellyfin and preparing the server

Transcode temp folder

Sharing the the local trancode folder

Make the new trancode folder

mkdir /var/lib/jellyfin/transcoding-temp

NFS is the recomend way of sharing this folder, but SMB/CIFS shoud also work

apt -y install nfs-kernel-server
echo '/var/lib/jellyfin/transcoding-temp <Network IP>/24(rw,sync,no_subtree_check)' >> /etc/exports 
systemctl restart nfs-kernel-server

Set the following setting in jellyfin "Transcode path" in the Playback settings to "/var/lib/jellyfin/transcoding-temp"

Useing a existing remote share trancode folder

Make sure the folder is mounted at"/var/lib/jellyfin/transcoding-temp"
Set the following setting in jellyfin "Transcode path" in the Playback settings to "/var/lib/jellyfin/transcoding-temp"

Jellyfin user

Generating sshkey pair without password

sudo -u jellyfin mkdir -p /var/lib/jellyfin/.ssh
sudo -u jellyfin ssh-keygen -t rsa -f /var/lib/jellyfin/.ssh/id_rsa

Set the jellyfin user to login as bash in /etc/passwd

Step 2: Install slave/render servers

Getting info

Run cat /etc/passwd | grep jellyfin: to get user info, i will refer to it as <JelUser>
Run cat /etc/group | grep jellyfin:, to get group info, i will refer to it as <JelGroup>
Run cat /var/lib/jellyfin/.ssh/id_rsa.pub To get ssh-key for sending commands , i will refer to it as <MasterPubKey>
Get the ip of the master, i will refer to it as <MasterIP>

Installing on the remote slave

Use the info you collected en follow "Slave-install.md"
sudo -u jellyfin ssh -i /var/lib/jellyfin/.ssh/id_rsa jellyfin@<SlaveIP>
When connected to the master exit the session with the slave server
Repeat these steps for all slave server

Adding local system as slave

echo 'ssh-rsa <MasterPubKey>' | sudo -u jellyfin tee /var/lib/jellyfin/.ssh/authorized_keys
sudo -u jellyfin ssh -i /var/lib/jellyfin/.ssh/id_rsa jellyfin@localhost

Step 3: Installing rffmpeg

mkdir /etc/rffmpeg /opt/rffmpeg
wget https://raw.githubusercontent.com/joshuaboniface/rffmpeg/master/rffmpeg.yml.sample -O /etc/rffmpeg/rffmpeg.yml
wget https://raw.githubusercontent.com/joshuaboniface/rffmpeg/master/rffmpeg.py -O /opt/rffmpeg/rffmpeg.py
ln -s /usr/local/bin/rffmpeg.py /opt/rffmpeg/ffmpeg
ln -s /usr/local/bin/rffmpeg.py /opt/rffmpeg/ffprobe

Step 3: Configuring rffmpeg

Add to the host section of /etc/rffmpeg/rffmpeg.yml Example of the section in the config file

remote:
    # A YAML list of remote hosts to connect to
    hosts:
        - 192.168.1.2
        - 192.168.1.3

if you also want the local system to render add localhost or 127.0.0.1

Step 4: Set jellyfin to use rffmpeg

Set the following setting in jellyfin "FFmpeg path" in the Playback settings to "/opt/rffmpeg/ffmpeg"

Done