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speedsix
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 Posted: Fri Mar 31, 2006 4:32 pm |
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Joined: Wed Mar 29, 2006 4:19 am
Posts: 29
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Just got my backend and frontend working, backend is an old 700mhz 384MB machine.connected to my amd64 frontend ubuntu machine, running 0.19 myth.
I'm getting a ver ylong pause selecting Watch Tv and when changing channels.
My output is..
Code: 2006-03-31 23:25:54.293 TV: Attempting to change from None to WatchingLiveTV
2006-03-31 23:25:54.302 Using protocol version 26
2006-03-31 23:25:58.127 RingBuf(myth://10.0.0.4:6543/1035_20060331232554.mpg): Waited 2 seconds for data to become available...
2006-03-31 23:25:59.565 RingBuf(myth://10.0.0.4:6543/1035_20060331232554.mpg): Timing out wait due to impending livetv switch.
0: start_time: -9223372036854.775 duration: -9223372036854.775
stream: start_time: -9223372036854.775 duration: -9223372036854.775 bitrate=0 kb/s
2006-03-31 23:26:02.558 AFD: Opened codec 0x8326b70, id(MPEG1VIDEO) type(Video)
2006-03-31 23:26:02.558 NVP: Disabling Audio, params(-1,-1,-1)
2006-03-31 23:26:02.558 NVP: Disabling Audio, params(0,-1,-1)
2006-03-31 23:26:03.475 TV: Changing from None to WatchingLiveTV
2006-03-31 23:26:03.477 New DB connection, total: 3
2006-03-31 23:26:03.567 Connected to database 'mythconverg' at host: 10.0.0.4
2006-03-31 23:26:03.610 Realtime priority would require SUID as root.
[mpeg1video @ 0xb74e87c4]qscale == 0
[mpeg1video @ 0xb74e87c4]Warning MVs not available
2006-03-31 23:26:04.344 LiveTV forcing JumpTo 1
2006-03-31 23:26:04.475 Video timing method: USleep with busy wait
2006-03-31 23:26:04.837 NVP: prebuffering pause
2006-03-31 23:26:05.656 NVP: Prebuffer wait timed out 10 times.
2006-03-31 23:26:06.306 rebuffering (1 32768)
2006-03-31 23:26:06.479 NVP: Prebuffer wait timed out 10 times.
0: start_time: 7073.167 duration: 0.900
1: start_time: 7073.159 duration: 0.842
2: start_time: 7073.159 duration: 0.909
3: start_time: 7073.159 duration: 0.909
stream: start_time: 78590.652 duration: 10.096 bitrate=3395 kb/s
2006-03-31 23:26:07.489 AFD: Opened codec 0xac7164e0, id(MPEG2VIDEO) type(Video)2006-03-31 23:26:07.538 AFD: Opened codec 0xac716a60, id(MP3) type(Audio)
2006-03-31 23:26:07.538 AFD: Opened codec 0xac716fe0, id(DVB_SUBTITLE) type(Subtitle)
2006-03-31 23:26:07.538 AFD: Opened codec 0xac717560, id(MP3) type(Audio)
2006-03-31 23:26:07.559 Opening audio device '/dev/dsp'.
2006-03-31 23:26:07.559 Opening OSS audio device '/dev/dsp'.
2006-03-31 23:26:07.622 NVP: Enabling Audio
2006-03-31 23:26:07.783 NVP: Prebuffer wait timed out 10 times.
2006-03-31 23:27:10.894 NVP: prebuffering pause
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speedsix
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Posted: Wed Apr 05, 2006 7:44 am |
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Joined: Wed Mar 29, 2006 4:19 am
Posts: 29
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Anyone else getting long pauses changing channel?
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snaproll
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Posted: Wed Apr 05, 2006 1:58 pm |
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Joined: Sun Jul 24, 2005 4:16 pm
Posts: 508
Location:
Ft. Worth TX
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Yes, but I think it's 'relatively normal' behavior..
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Xsecrets
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Posted: Wed Apr 05, 2006 2:59 pm |
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Joined: Mon Oct 06, 2003 10:38 am
Posts: 4978
Location:
Nashville, TN
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in addition "very long" really doesn't tell us much. I've know people that 1/2 sec is very long to them, and others that 30sec is not too slow. I would say that anything over 10sec or so is most likely some sort of problem and not 'relatively normal'
_________________ Have a question search the forum and have a look at the KnoppMythWiki.
Xsecrets
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elgordo123
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Posted: Wed Apr 05, 2006 4:34 pm |
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Joined: Thu Feb 12, 2004 2:54 pm
Posts: 392
Location:
Beaumont, CA
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I'm using R5B7 and I dont see a long pause. It takes about 5-7 seconds for me. It has to buffer 3 seconds. Then probably 2-3 seconds to get the picture. Not really a problem for me unless I'm channel surfing. I watch live tv via myth all the time.
_________________
ASUS A7N266 Micro-ATX Motherboard
Athlon 2200 processor
512K Kingston PC2100 Memory
MicroAtx Case
2 PVR250's w/remote
eVGA e-GeForce mx4000 (64 Ram with Tv/Out (Svideo))
Lite-on DVD cd-rw combo
120 GB Western Digital
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Xsecrets
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Posted: Wed Apr 05, 2006 8:37 pm |
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Joined: Mon Oct 06, 2003 10:38 am
Posts: 4978
Location:
Nashville, TN
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I think the big reason people have brought this up is that on a good system now it takes 5-7 sec where on 0.18.1 it only to 3-4 sec. I'm not really sure what the issue is. I can actually get closer to realtime on a recording than livetv even though they are basically the same thing. I don't watch livetv all that often, so it's not a huge deal for me.
_________________ Have a question search the forum and have a look at the KnoppMythWiki.
Xsecrets
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tjc
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Posted: Wed Apr 05, 2006 9:05 pm |
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location:
Arlington, MA
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I think they made the buffering more conservative to work better with HDTV.
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alien
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Posted: Thu Apr 06, 2006 12:16 am |
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Joined: Mon Jun 21, 2004 5:28 am
Posts: 700
Location:
Germany
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I haven't noticed this, but looking at the logs it seems to be taking 13s to start up. When it finally starts, there is 10s of prebuffering.
What is really interesting is that it seems to take two tries connect to the ringbuffer. There is a "Switching from LiveTV to none" in the middle. (I'm assuming this log is for simply starting LiveTV and doesn't contain a subsequent channel change)
My guess is that you've stumbled on a race condition in LiveTV. It might be processor speed related as not everyone is seeing it. You might want to go search the mythtv mailing lists.
[Disclaimer: I may not know what I'm talking about  ]
Cheers,
Allen
_________________
ASUS AT3N7A-I (Atom 330)
TBS 8922 PCI (DVB-S2)
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