When I record a show on the PVR using the HD6400 Bell receiver I would think it's hardware encoded H.264 with some predetermined bitrate. A 2Tb drive allows me to record about 500 hours of HD programming. Converting that into a bitrate that works out to 8.88 Mb/sec.
So if I record from the recorded show, Wouldn't I be recording from a compressed video already?
What I mean is if I recorded at 12Mb/s I wouldn't I get better quality directly from the satellite as opposed to a recorded stream from the PVR?
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Satellite TV broadcasts in N. America use H.264 for video, which means the video is already compressed before it is even transmitted. A satellite provider's DVR function typically records the broadcast H.264 transport stream to its hard drive as is, without further transcoding. This means the audio and video in the recording and the audio and video in the real-time broadcast are exactly the same.
If you could copy the recordings directly from the receiver's hard drive, you'd have the best possible quality, but the system is designed to prevent that. Recordings are encrypted and often broken into many small pieces
Last edited by usually_quiet; 29th Jan 2018 at 12:55.Ignore list: hello_hello, tried, TechLord
So the best is always to not re-encode but to simply copy 1:1. Like said earlier this isn't always possible because of DRM.
((*) Well, you lose information with every generation. You can however try to filter certain compression artifacts out so the end-result might look better than the original to a human. This requires more effort and knowledge than straigt re-encoding.)
jagabo was faster...
ok yes agreed recording a lossy recording using a lossy codec gets even worse. Now isn't that just for composite video?
However, looking at it slightly differently .... if it were HDMI video that has a specific number of bits being played per per second 8.8 Mbits/second (isn't that digital) even if it were a lossy codec recording the same 8.8 Mbits/second you wouldn't loose anything .. that's me thinking in digital terms. Thinking analogously it's of course going to loose out I understand that but writing this out I'm thinking I'm all wrong about HDMI.
Last edited by jagabo; 29th Jan 2018 at 20:05.