I'm one the (wannabe?) developers of the drivers for Hauppage USB TV-Tuner cards and many other cards using the NT1003/NT1004 chipset for linux which is commonly called the usbvision-driver (and here).
The state of the project is that very recently the propereriarty compression-scheme used to get the full-screen framerate through the usb-port, has been reverse-engineered (many creds to Joerg and Dwaine), is in development but is reported to work. I've been using the driver on a small screen in non-compression-mode for some time (with only some minor kernel panics).
When it comes to portability I am AKAI the only one who made this driver work under anything but x86. After a lot of tweaking I have the radio-part of the driver working on my linux powerpc with the same stability as under linux x86. The TV-tuning is more difficult because of the reverse byteorder and that the code is written with only one byteorder in mind. For that reason I've only made the sound for the TV work together with the ascii-graphics with the frontend aatv which I really couldn't confirm was correct. I beleve the best way to get the driver to work properly on ppc I will somehow have to tweak mplayer to do the conversion... Which wount be easy.
So in my experience, I'm sorry to say that the portability for the linux-drivers for usb tv-cards is, despite the great efforts on the driver stability of Dwaine, not quite there yet.
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I'm one the (wannabe?) developers of the drivers for Hauppage USB TV-Tuner cards and many other cards using the NT1003/NT1004 chipset for linux which is commonly called the usbvision-driver (and here).
The state of the project is that very recently the propereriarty compression-scheme used to get the full-screen framerate through the usb-port, has been reverse-engineered (many creds to Joerg and Dwaine), is in development but is reported to work. I've been using the driver on a small screen in non-compression-mode for some time (with only some minor kernel panics).
When it comes to portability I am AKAI the only one who made this driver work under anything but x86. After a lot of tweaking I have the radio-part of the driver working on my linux powerpc with the same stability as under linux x86. The TV-tuning is more difficult because of the reverse byteorder and that the code is written with only one byteorder in mind. For that reason I've only made the sound for the TV work together with the ascii-graphics with the frontend aatv which I really couldn't confirm was correct. I beleve the best way to get the driver to work properly on ppc I will somehow have to tweak mplayer to do the conversion... Which wount be easy.
So in my experience, I'm sorry to say that the portability for the linux-drivers for usb tv-cards is, despite the great efforts on the driver stability of Dwaine, not quite there yet.