For all my docker containers that transcode video, I try to mount a RAM filesystem to use instead of my SSDs or HDDs. Advantages are speed (RAM is faster) and endurance (reduces writes to the physical drives).
So for example, you can mount a volume like this in docker CLI:
-v '/tmp':'/transcode':'rw'
where the /tmp directory uses RAM on the server instead of a physical drive.
Is there a folder inside the Channels DVR container like /transcode where this could be done?