Transcoder not working - TranscodingSession.shutdown

Hi,

we are still using Wowza 3.5.0 with CentOS x64 and I wanted to use the transcoder add-on again now after a long time.

Unfortunately, I failed to get it working.

2017-09-28	19:34:23	CEST	comment	server	INFO	200	-	JNI:VideoEncoderH264VAAPI[global]: QuickSync on Linux: vaGetDisplay failed.	-	-	-	1899772.627	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
2017-09-28	19:34:23	CEST	comment	server	INFO	200	-	JNI:TranscoderSession.isCUDAAvailable[_defaultVHost_:live-trans/_definst_/live]: NVidia CUDA hardware acceleration is NOT available on Linux	-	-	-	1899772.627	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
2017-09-28	19:34:23	CEST	comment	server	INFO	200	-	JNI:TranscoderSession.isQuickSyncAvailable[_defaultVHost_:live-trans/_definst_/live]: Intel Quick Sync hardware acceleration is NOT available.	-	-	-	1899772.627	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
2017-09-28	19:34:23	CEST	comment	server	INFO	200	-	TranscodingSession.shutdown[live-trans/_definst_/live]	-	-	-	1899772.628	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-
2017-09-28	19:34:23	CEST	comment	server	INFO	200	-	TranscodingSession.shutdown[live-trans/_definst_/live]	-	-	-	1899772.628	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-

2017-09-28	19:58:10	CEST	comment	server	WARN	200	-	HTTPStreamerCupertinoIndexPlaylist.indexFile[live-trans/_definst_/ngrp:live_all]: MediaList is empty.	-	-	-	1063.006	

These are related lines in the log file. Apparently the transcoder immediately shuts down.

Unfortunately I am clueless.

Anyone got any clues?

Thanks in advance!

Philipp