I installed jibri on debian buster. If I use the default-jre-headless it will install openjdk-11-jre-headless. Apparenty jibri works with it but it cannot stop ffmpeg, hence the recording is corrupted:
2020-04-09 16:28:55.787 SEVERE:  org.jitsi.jibri.util.JibriSubprocess.ffmpeg.stop() Error trying to gracefully stop ffmpeg, destroying forcibly 2020-04-09 16:28:55.793 INFO:  org.jitsi.jibri.util.JibriSubprocess.ffmpeg.stop() ffmpeg exited with value 137
ffmpeg.0.txt just shows that it’s still capturing until it’s killed.
If I use openjdk-8-jre-headless (from the stretch repositories) I can see that ffmpeg stops correctly.