High bitrates are bad

Last night I wanted to record Lohn der Angst (great movie btw) with my DVB-S card. This works normally great with Kaffeine but as I wanted to cut the movie and burn it onto a DVD I noticed that the disk was full. The length of the MPEG-2 transport stream is 8 GB and the end is missing :-( Okay, the movie has a runtime of 145 minutes but come on it's black and white and from 1953 so there is absolutely no reason to use a average bitrate of more than 7000 kbps...

Hope it will be broadcasted again soon.