SOLVED: Jellyfin becomes unresponsive when transcoding

[tmsrxzar]

ffmpeg log could be informative

recommended tests
speed test the transcode target drive https://www.cyberciti.biz/faq/howto-linu...dd-command
check resources usage with iotop during playback attempt https://www.geeksforgeeks.org/iotop-comm...h-examples

if ram is available and cpu usage is low; suspect ssd
move forward from the ffmpeg log and the recommended tests