Back when I ran a business that competed with TVEyes and Critical Mention, I used up to 8 analog tuners in a single box to record channels. Happauge PVR-150 and PVR-500 (2 tuners in one card).
Nowadays, it's harder because you can't get many of the necessary channels via analog. You need the decryption of a digital box (imagine several cable boxes stacked on top of each other) to grab the video and even then, it's difficult to get the closed captioning. This makes the colocation complexity more expensive and many facilities would just say "um, no thanks, we're not running a cable line in here for that."
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Back when I ran a business that competed with TVEyes and Critical Mention, I used up to 8 analog tuners in a single box to record channels. Happauge PVR-150 and PVR-500 (2 tuners in one card).
Nowadays, it's harder because you can't get many of the necessary channels via analog. You need the decryption of a digital box (imagine several cable boxes stacked on top of each other) to grab the video and even then, it's difficult to get the closed captioning. This makes the colocation complexity more expensive and many facilities would just say "um, no thanks, we're not running a cable line in here for that."