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| very very jerky live TV http://forum.linhes.org/viewtopic.php?f=6&t=5142 |
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| Author: | edo660 [ Thu Jun 30, 2005 8:41 pm ] |
| Post subject: | very very jerky live TV |
ok, sorry to post another topic but ive searched knoppmythwiki, various threads, with no success. what happens is that live TV viewing in mythtv is VERY jerky, plays about .5seconds then pauses for 1-2seconds. im not sure if its hardware related or software. the setup is as follows: P3 S370 1ghz 256mb PC133 RAM intel mobo, i810 chipset (onboard vid/sound) WD 80gig ata133 (purchased a month ago) Leadtek 2000XP tv tuner i did the normal install of r5a16 so i havent touched anything really. with reguards to the HDD, yes DMA is on, IO is at 32bit, etc... as per the "HDD performance" topic in knoppmythwiki. i suspect its the ram...but can somone give an opinioun? TV is fine when viewing in something like xawtv, but i wanna use mythTV. normal video playback is perfect, so i assume its an issue with the live TV buffer. BTW: /myth has about 65gig parttion, and /cache has about 6.3gig. hope that helps. thanks |
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| Author: | tjc [ Thu Jun 30, 2005 9:29 pm ] |
| Post subject: | |
Most likely your video output. This is a pretty common symptom when your video card and/or driver isn't keeping up. Even folks with faster cards like an nvidia FX5200 see this with unaccelerated drivers. Lots of other possibilities too, like your harddrive and IDE chip combo not supporting DMA, or ... If you ssh into the box (using something like putty) and run "top" what does it show when you're trying to watch live TV? |
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| Author: | rigga [ Fri Jul 01, 2005 1:25 am ] |
| Post subject: | |
I had a similar problem a few weeks ago and it turned out that the capture resolution was wrong, im in PAL land and it was set to 480x480 rather than 720x576. I changed the settings and it fixed the problems, not sure if this will work for you though as you have not said if you are PAL or NTSC. I checked the settings on the card using the ivtvctl command as in mythtv-setup it was already showing 720x576 but using ivtvctl it showed that the card was infact set to 480x480. Hope this helps |
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| Author: | edo660 [ Fri Jul 01, 2005 1:44 am ] |
| Post subject: | |
hmmmm interesting, i might try that, since yes i am PAL |
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| Author: | cesman [ Fri Jul 01, 2005 2:51 am ] |
| Post subject: | |
Live TV w/ a 1 gig P3 and a software tuner. OUCH! |
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| Author: | edo660 [ Fri Jul 01, 2005 2:58 am ] |
| Post subject: | |
cesman wrote: Live TV w/ a 1 gig P3 and a software tuner. OUCH!
heh, is the hardware fine other then the card? cause i was gonna buy a new capture card, but that will cost me lots...so if i can keep the hardware thatd be good. either that or buy a better PC, since my XP2600, 1gig DDR400, nForce 2 PC can handle watching live tv AND encoding into mpeg2 fine no problems 
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| Author: | undy [ Mon Jul 04, 2005 5:31 pm ] |
| Post subject: | |
Running the same tv card on a P4 2.4 GHz, doesn't use up much CPU for live TV (10%), but I have an nvidia card in there. Would altering the livetv recording profile to be low powered help him ? I'm not sure how MythTV does liveTV, so feel free to tell me thats a dumb idea. What is it set to at the moment edo ? (Sorry I didn't get back to you about LIRC, still trying to figure out why my new install keeps adding channels I don't want... I will get there). |
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| Author: | cesman [ Tue Jul 05, 2005 11:58 pm ] |
| Post subject: | |
undy wrote: Would altering the livetv recording profile to be low powered help him ? Yes it might.
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