2013-08-18, 01:20
So if you don't do timeshift or recording, why not just watch your tv without a computer?
(2013-08-19, 20:34)opdenkamp Wrote: tvheadend and vdr will switch very fast, typically ~1 secondNot really. 5-6 seconds in my case, 1/10 times xbmc freezes during channel switching and I need to choose other channel. You are right if you are saying about xbmc 11. But starting from Frodo things are much more worse, at least in my case sorry.
(2013-08-19, 20:34)opdenkamp Wrote: @negge: if channel switching doesn't work in gotham when you press a number (in full screen mode), then this is a bug. register it on trac please
(2013-08-20, 01:00)nickr Wrote: At least for mythtv the channel change will always take some time - read up on the mythtv mailing list archives. But basically:These shouldn't mean too much to how long channel changing is taking though.
1. Most tuner card drivers do have some delay compared to the specialised chips in set top boxes or TVs
2. The Live TV stream is being recorded all the time (so you can pause, rewind, fast forward etc) and then retrieved from the disk by the frontend process (be that mythfrontend or xbmc) and played back. If the playback is too close to the recording then you run into problems where the playback process is starved of data and you get stuttering. There is therefore inherently a delay between "live" and what you see on the screen.
3. When you change a channel the system needs to: get the tuner card to physically tune to the new channel, select the streams you want to see & hear, close the existing recording file, open a new recording file, buffer enough to get over potential stuttering and serve up the new stream to the frontend. It is not a s simple as in a STB/Tv where you aren't recording. Some delay is inevitable.
(2013-08-20, 08:44)negge Wrote: Just tested with a timer last night, for me it takes 2,5 seconds to see the first frame, then another 0,7 seconds for video starts playing. On unencrypted channels it's about one second less, so I can't really complain here. There's no practical difference between SD and HD for me. I'd much rather see developer time spent on fixing the remaining bugs with the PVR functionality instead of trying too hard to chase down channel switching times, especially since it's highly backend-specific (as are certain other bugs of course).You're using tvheadend though, so won't see the problem. tvheadend and vdr work differently from the other pvr addons (by delivering pre-demuxed streams) so don't have the issue with slow channel change times. I'm pretty sure you'll find the users of every other pvr addon do think it's worth while that more effort is spent improving the channel change time - ideally along the lines of margro's change.
(2013-08-20, 09:04)sub3 Wrote:(2013-08-20, 08:44)negge Wrote: Just tested with a timer last night, for me it takes 2,5 seconds to see the first frame, then another 0,7 seconds for video starts playing. On unencrypted channels it's about one second less, so I can't really complain here. There's no practical difference between SD and HD for me. I'd much rather see developer time spent on fixing the remaining bugs with the PVR functionality instead of trying too hard to chase down channel switching times, especially since it's highly backend-specific (as are certain other bugs of course).You're using tvheadend though, so won't see the problem. tvheadend and vdr work differently from the other pvr addons (by delivering pre-demuxed streams) so don't have the issue with slow channel change times. I'm pretty sure you'll find the users of every other pvr addon do think it's worth while that more effort is spent improving the channel change time - ideally along the lines of margro's change.