Having the same issue with 1.13.8.5395 I have a WinTV Quad HD also. I had it working on an earlier verion, but I had to limit it only one DVR. If I have the 2 DVRs added for all 4 tuners, it has transcoder errors every time. Will uninstall and reinstall an earlier one and hope for the future.
I expected the Plex DVR features to work as advertised, so far it has been a struggle to get it to work at all.
