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| slow PVR-250 playback http://forums.linhes.org/viewtopic.php?f=2&t=2303 |
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| Author: | father_of_miles [ Wed Sep 01, 2004 12:41 pm ] |
| Post subject: | slow PVR-250 playback |
Setup: PIII 1Ghz Tualatin Biostar MB Onboard Trident Blade Video connected to AverKey3 VGA->TV 512 MB RAM PVR-250 MCE KnoppMyth R4V4.1 After finally getting the PVR-250 to work (had to d/l the latest ivtv drivers & recomplie, but seems to work), the one problem is slow playback of mpeg2 files. Top shows pretty much 0% idle (split 65% between mythfrontend and 35% for XFree86) when either LiveTV watching or viewing recorded programs. As an experiment I exited the frontend, ran: mplayer -fs -vo xv /myth/tv/blahblah.nuv I was 25% idle when doing this w/ no stuttering or hesitation, but watching the same recording through the frontend got me 100% CPU usage and stuttering For reference, getting 75% idle watching DivX movies through mythvideo. Pardon my ignorance on this, but does myth use mplayer to view live tv / recorded programs? Is there some place where I may have unwittingly disabled xv? Running mythfrontend from command line and starting to watch TV; piping standard output to a file I get: 2004-09-01 11:05:04 mythfrontend version: 0.15.20040525-1 www.mythtv.org 2004-09-01 11:05:04 Enabled verbose msgs : important general 2004-09-01 11:05:05 Registering Internal as a media playback plugin. 2004-09-01 11:05:05 Registering MythDVD DVD Media Handler as a media handler 2004-09-01 11:05:05 Registering MythDVD VCD Media Handler as a media handler 2004-09-01 11:05:05 Registering MythMusic Media Handler as a media handler 2004-09-01 11:05:08 Connecting to backend server: 10.0.1.210:6543 (try 1 of 5) 2004-09-01 11:05:08 Using protocol version 8 2004-09-01 11:05:08 Using protocol version 8 2004-09-01 11:05:08 Using protocol version 8 2004-09-01 11:05:10 Opening OSS audio device '/dev/dsp'. 2004-09-01 11:05:10 Audio fragment size: 4096 2004-09-01 11:05:10 Using XV port 61 2004-09-01 11:05:11 Changing from None to WatchingLiveTV 2004-09-01 11:05:21 Changing from WatchingLiveTV to None 2004-09-01 11:05:21 Changing from None to None Any ideas? Let me know if any other info I can provide. Mucho thanks. |
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| Author: | cesman [ Wed Sep 01, 2004 12:58 pm ] |
| Post subject: | |
No, MythTV doesn't use MPlayer to play recorded files. |
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| Author: | Xsecrets [ Wed Sep 01, 2004 1:10 pm ] |
| Post subject: | |
and livetv is not the same as watching a recording. |
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| Author: | father_of_miles [ Wed Sep 01, 2004 7:13 pm ] |
| Post subject: | any way to improve playback? |
Ok - so is the issue bad xvideo support for trident that is exposed by myth decoder? Somethying else? The docs indicate that w/ a 1Ghz cpu I shouldn't expect cpu probs wrt decoding. Any tips for improving playback performance? thx |
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| Author: | Xsecrets [ Wed Sep 01, 2004 10:43 pm ] |
| Post subject: | |
If mplayer plays it back fine mythtv should too. I would check to make sure you don't have the deinterlace or jitter reduction filters enabled. both improve the quality but at a high cpu price. also make sure you aren't trying to use xvmc since your card doesn't support it. |
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