DirecTV to AppleTV. It’s not as complicated as it sounds and may be obvious to someone who has all the parts, but here’s how I pulled it off.
I’ve got an old SlingBox hooked up to my DirecTV box in Virginia. Then in South Carolina, where I had good Internet download speeds but no TV service, I used my MacBook Pro’s mirroring over AirPlay feature to show the picture on my television. I was very impressed with how it looked. There was some pixelation only when there as a lot of fast movement on the screen at once. It only got stuck every half hour or so and corrected itself in 15 seconds or so with no intervention.