The program tvtime only supports video capture cards that output as is or data that is not encoded in the stream. If the card does not output video and sound as is, you have to use MPlayer, Xine-lib, or VLC.
The following should help setting up the card.
Since it is basically a DVB card, you will also need DVB utilities. I suggest skip tvtime step in the above link and use MPlayer's DVB or TV device feature to use the card.
I do not have the card nor do I have a DVB card, so I can not help you any further.
IMHO, totem is alright but MPlayer is a lot better. MPlayer is significantly more reliable and stable.
If your video card is one of the VDPAU supported cards, hardware decoding for MPEG-1 or MPEG-2 can be done with out consuming too much processing power by the main processor.