Fire ComcastTV - record flash from TNT

There are some shows on TNT and other cable TV channels that BB and I enjoy.  Generally, these are available on the shows's web site as streaming flash files.  It would be handy to be able to save them and then play later.  Several possibilities:

• http://www.unixuser.org/~euske/python/vnc2flv/index.html looks like it might have some potential
• http://camstudio.org/
• Xvidcap http://tombuntu.com/index.php/2007/11/06/record-your-screen-with-xvidcap/
• VERY poor frame rate.
• RecordMyDesktop http://www.howtogeek.com/howto/24742/record-screen-activity-in-ubuntu-with-recordmydesktop/
• Played with it a bit.  Able to do a fair job of video.  Not getting audio.  Not sure why but it seems to be a common problem.
• home is here http://recordmydesktop.sourceforge.net/faq.php
• Interesting youtube video here http://www.youtube.com/watch?v=W_QoWzgYp1A.  Reference to editing software and combining multiple audio streams.

Recordmydesktop seems to do well with the video but sound is an issue.

• Found a clue at http://unix.stackexchange.com/questions/3490/how-can-i-record-the-sound-output-with-gtk-recordmydesktop after a good deal of searching and experimentation.  It seems if I set the internal audio to Analog Stero Output all is well.  There is some choppy video but now I've got sound.
• Reduce video quality to 31%,  15 frames per second, zero compression, frequency 28000:  Works to a point but video is a bit choppy.

I'll do some more research to see if there is a way to snag the video directly from the stream.