Freeview is, in itself, just a service that transmits TV signals terrestrially. It's no more able to provide any type of recording facility than, say, your local radio transmitter does.
I have a HUMAX HDR-FOX T2 PVR which is a few years old now. I can record, playback & rewind Freeview channels via the PVR. However the subtitles playback on recorded Freeview channels are always out of sync with the subtitles appearing too soon. Subtitles recorded on channels 1,2,3,4,& 5 always playback in sync. Neither Humax or the TV companies can tell me why this happens. I don't think I will buy another Humax.
Can I tag my Freeview question on to this?! Any idea why my Dave channel on Freeview has very poor volume? It just seemed to change to very quiet a couple of weeks ago - and its the only channel it seems to happen to. Thanks