wtv files are those files that windows Media Center creates when recording TV programs. Media Center comes with windows 7 and I use it in combination with a Tiny Twin high definition TV tuner, which is a USB device that actually contains 2 tuners so you can watch (and record) one channel while recording another one. So far it has worked quite well.
On Windows 7 you can burn wtv files to disc using the windows DVDMaker (which also comes with windows 7), however it gets more complicated when you want to edit a movie (like removing ads or cutting clips) or when the movie is too long to burn to one (single sided) disc.
Typically a Linux tool, ffmpeg is also available for windows. The windows version can be downloaded from hawkeye.arrozcru.org. The zip file will be named something like ffmpeg-git-c967860-win64-static for a 64 bit machine. When extracted, you will see a few executables (including ffmpeg.exe) and a few folders, including the all important doc folder. In order to create a simple work environment, I did the following:
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