How to reset status "Unable to transcode" for synced items
I'm using the Plex App for Windows 8.1 and synced a collection from a shared library. I succeeded to sync 278 of 321 items, but failed for 43 items stating "Unable to transcode". The items definitely can be transcoded, I tried this by syncing a single item of them successfully.
Now how can I force retrying to transcode the failed items? Restarting sync, etc does not help, it even does not try to start the transcoding. What does trigger a new transcoding trial?