With regards to the Malwarebytes Premium issue causing transcoder failures with following errors logged
ERROR - [Transcoder] av_interleaved_write_frame(): Unknown error
coupled by
Examples
ERROR - [Transcoder] [stream_segment,ssegment @ xxxxxxx] Failed to open segment list 'http://127.0.0.1:32400/video/:/transcode/session/xxxxxxxxxxxxxxxxxxxxxxxx/xxxxxxxxxxx/seglist
ERROR - [Transcoder] av_interleaved_write_frame(): Unknown error
ERROR - [Transcoder] Error writing trailer of media-%05d.ts: Invalid argument
or
ERROR - [Transcoder] [dash @ 028ef3c0] Unable to open http://127.0.0.1:32400/video/:/transcode/session/xxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxx/manifest for writing
ERROR - [Transcoder] av_interleaved_write_frame(): Unknown error
We now have a support article covering this
Windows: Transcoder failures during playback, live TV, or DVR recording
