Emby Server Little helpers

First, may need to add Emby libraries to Linux:

ln -s /opt/emby-server/lib/libavdevice.so.59 /usr/lib/; \
ln -s /opt/emby-server/lib/libavfilter.so.8 /usr/lib/; \
ln -s /opt/emby-server/lib/libavformat.so.59 /usr/lib/; \
ln -s /opt/emby-server/lib/libavcodec.so.59 /usr/lib/; \
ln -s /opt/emby-server/lib/libpostproc.so.56 /usr/lib/; \
ln -s /opt/emby-server/lib/libswresample.so.4 /usr/lib/; \ 
ln -s /opt/emby-server/lib/libswscale.so.6 /usr/lib/; \
ln -s /opt/emby-server/lib/libavutil.so.57 /usr/lib/;

Then You can convert videos using Emby ffmpeg. Example for HEVC:

for i in *.mkv; do /opt/emby-server/bin/ffmpeg -y -start_at_zero -init_hw_device "cuda=cuda:0"  -i "$i" -map 0:v -map 0:a -c:v:0 hevc_nvenc -c:a copy  "${i%.mkv} - HD.mkv";done

Or scale down:

for i in *.mkv; do /opt/emby-server/bin/ffmpeg -y -start_at_zero -init_hw_device "cuda=cuda:0"  -i "$i" -map 0:v -map 0:a -vf scale="iw/2:ih/2"  -c:a copy  "${i%.mkv} - HD.mkv";done

Clean way to do this is with a service unit override.

1. Stop emby and restore the original unit file.

service emby-server stop

2. Verify that the unit file has the original ExecStart command:

systemctl show emby-server |grep ExecStart

3. Create a unit override to add the Nice parameter. This will open an editor where you can add Nice=-5 to the service block.

systemctl edit emby-server

Add:

[Service]
Nice=-20

4. Exit and save the override file. Y and enter for the prompts.

5. Start the Emby server. And run top/htop to verify the new nice value.

service emby-server start

Source: Emby forums

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