From my Bell Fiber TV Decoder, but I'm using HDMI splitter ...
Yes ! Actually, I'm using currently a HDMI Capture box purchased a year ago (at US$80), which store the capture on USB dongle, which I then copy files into a NAS, but current limitation is that files are splitted into 2GB FAT chunk (around 20mins of recording) instead of single files. I then need to concatenate them into single one using ffmpeg.
Then, I convert them into DVD with "dvdauthor" to give DVDs to my mother ...