Generates a PAL, NTSC, SECAM*, D/D2-MAC video signal from a video
file, stream or test pattern. Also supports older 819, 405, 240
and 30 line standards, as well as the NASA Apollo video standards,
both colour and mono.

Input is any file type or URL supported by ffmpeg.

Output can be to a file, HackRF, fl2k-supported VGA adaptors or
any SDR supported by SoapySDR.