Nothing changed that would impact that. You may have accidentally specified https://dvr-media-server.local
to trigger that error.
Please run:
ps auxww | grep ffmpeg
and provide the output.
Because we update from time to time when we have the resources to do so.
It's likely it's an issue with how we are doing the transcoding, but I would not know for sure without more details.
If you could do this, it will help me run some tests on the content: