On Wed, 23 Feb 2005 00:19:47 -0500, Brad Benson <[EMAIL PROTECTED]> wrote: > On Wed, 23 Feb 2005 00:15:54 -0500, Brad Benson <[EMAIL PROTECTED]> wrote: > > > Well, the first thing you'd have to do, from my understanding, is > > remove the PVR functions from live TV watching. The reason for the > > delay in changing channels is the need to build up a buffer of video > > before displaying it to the user. When watching "live tv" in myth > > you're actually watching video that is about 3 seconds behind the real > > live feed because the video is recorded and you are really watching > > the recorded video just after it's recorded. Since myth can only > > buffer video as fast as it's being received you can't buffer 3 seconds > > of video in less than 3 seconds. > > > > One thing I forgot to mention is that, with a single tuner card, any > PVR can only tune one channel at a time so if you're watching, for > instance, channel 4 then that's what's getting put in the buffer. > When you change to channel 5 then the system has to start buffering > video on that channel. There's no way to buffer more than one channel > without multiple tuners and even then it's pretty difficult. Besides, > who's to say what the additional buffered channels should be? If the > system is buffering channels 4, 5 and 6 on the three (hypothetical) > tuners available and you jump to channel 57 you're still gonna have to > wait for those 3 seconds to start buffering that channel and now > you've just wasted the time/CPU/disk space that you were using to > buffer channels 5 and 6. > > Make sense? > > Brad >
Two ideas that I had on this subject: idea 1 Would it be technically possible to have an option to enable the PVR functionality only once the pause button is pressed (i.e. only create a buffer on pause)? You'd lose the ability to rewind through stuff you'd just been watching , but it might work better for some people. idea 2 Is it possible to send video to the screen and also write it a file (albeit with some delay in writing it to the file)? If so you could again start watching TV straight away and then have a buffer 3 seconds behind that could be switched to once pause/rewind etc was pressed. Again there would have to be a delay for the PVR functionality and I could see problems in how to handle the transition to the buffer. Chris
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