From normal TV stations, though not from HD channels - which consume
too much disk space.
Of course I then strain the movies thru a video editor (Video ReDo) to
cut out the ads.
Then I store them on a dedicated HDD. This 1Tb HDD can hold 250
normal movies, and when this is full I buy another HDD.
Video Re Do and other video editors do not like the raw Windows media
files, and so they must be converted.
A group like rec.video.desktop may be a better source of inspiration,
as there are people who edit stuff like that all day.
I'd want to go back and review the workflow first, to make sure
you aren't missing an opportunity some where.
Are you using Media Center to record the content, or some
other tool ?
Is the "2 tuner card" a digital card (8VSB), and are you recording digital
content ? Perhaps you could name the card, and also what recording
application you're using. If you're in a country which still has
analog, you could be recording NTSC or PAL, and then the issues will
be slightly different (less chance of a "free lunch" in the work
VideoReDo is frame accurate MPEG2.
An OTA digital broadcast, could well be carrying some version of
MPEG-2 as well. Now, perhaps what you'd want, is a recording
application that simply records the MPEG-2. And then, you should be
able to take it into VideoReDo, snip commercials, and impose
no recompression penalty. The final question then is, what format
do you want to store them on, until playing them ? MPEG-2 might
be fine for that as well.
It's possible, that the recording application is changing formats
when recording, forcing you to do yet another conversion back
to the format being transmitted in the first place.