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pudding
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Posted: Tue Jan 23, 2007 2:21 pm |
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Joined: Wed Jan 11, 2006 11:08 pm
Posts: 14
Location:
NJ
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I'm not totally sure how to describe this issue, so if I can provide further details, please let me know.
I have been successfully running R5C7 on a Pentium 2 Celeron with a Hauppage PVR-150 (non-MCE) for a while now. A few months ago, I decided to try R5D1 (a clean install), and ran into this same issue. Went back to R5C7, everything was fine.
I've now done a clean install of R5E50, and while I'm particularly thrilled with all of the improvements, I'm having a major problem with recording TV. VLC does not show the proper time for the video, and after about 30 seconds of playback, the video and the audio seem to be in fast forward. It just skips about every 1/2 second.
Worth noting, I'm not playing this on the Pentium 2, I'm transferring it over the LAN to my Powerbook via SMB. The only thing different, hardware-wise, is that I've switched the Pentium 2's video card from the Intel onboard to the Nvidia GeForce 2, now that the drivers support it.
Any idea what's going on?
_________________ KnoppMyth R5E50
Pentium 2 - Celeron
Hauppage PVR-150 (non-MCE)
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modemboy
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Posted: Tue Jan 23, 2007 3:47 pm |
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Joined: Thu Feb 24, 2005 1:36 am
Posts: 74
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Have you verified SMB is copying the file fast enough? Try copying the file over to the Powerbook, see if it copies fast enough. Then playback the copied file on the PB to be sure the problem is with capturing and not the network.
If it is a capture problem, check that you don't have any IRQs being shared by any major devices and the pvr card by running:
cat /proc/interrupts
_________________ MythTV box: Opty 170, MSI K8NGM2-FID, 1.5 GB PC2700, Seagate 7200.10 400GB, Lite-On Combo drive. PVR-150, HDHomeRun. Antec Sonata, Freezer 64 Pro. Oh so quiet.
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pudding
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Posted: Fri Jan 26, 2007 12:26 am |
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Joined: Wed Jan 11, 2006 11:08 pm
Posts: 14
Location:
NJ
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Sorry for the late reply! Thanks for the help.
I have been copying the file via SMB from the PVR to my Powerbook. I just recorded two more shows, and looked at them via SMB (without copying, this time) and it's the same thing. The video appears to be sped up, and VLC reports the time as:
-7:-51:-
I ran the command from your post, and got this:
Code: CPU0 0: 34848262 XT-PIC timer 1: 10 XT-PIC i8042 2: 0 XT-PIC cascade 3: 2087165 XT-PIC nvidia 5: 329695 XT-PIC ivtv0 6: 5 XT-PIC floppy 7: 12 XT-PIC parport0 8: 1 XT-PIC rtc 9: 502574 XT-PIC Intel 82801AA-ICH, eth0 10: 0 XT-PIC MPU401 UART 11: 0 XT-PIC uhci_hcd:usb1 12: 104 XT-PIC i8042 14: 102247 XT-PIC ide0 15: 2910819 XT-PIC ide1 NMI: 0 LOC: 0 ERR: 5 MIS: 0
Does that look good?
_________________ KnoppMyth R5E50
Pentium 2 - Celeron
Hauppage PVR-150 (non-MCE)
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marc.aronson
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Posted: Fri Jan 26, 2007 8:53 am |
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Joined: Tue Jan 18, 2005 2:07 am
Posts: 1532
Location:
California
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I have had problems playing back myth recordings via VLC ever since the capturing of CC (Closed Caption) data was introduced. About 20-25 seconds into the playback the video would start to do strange things and when I selected view->messages I would see a massive number of error messages that read "main warning: clock gap, unexpected stream discontinuity". The VLC folks seem to feel that myth/IVTV is creating bad mpeg streams and that it's not something they should address. My experience is that 2 other media players (Nero & mplayer) are able to play these mpeg2 streams w/ out problems. I don't know which package is actually causing the problem, but in any event, here are two workarounds:
1. Try a different media player. I am now using mplayer instead of VLC and it works well.
2. Disable capturing of the Closed Caption data. My notes on how to do this are below.
Not sure if this is the problem you are having, but thought I would provide this info just in case it helps.
Marc
Code: The capturing of VBI means that you have the closed-caption capability. Unfortunately, this appears to create mpeg2 streams that are damaged and will not play back properly with the Mediagate MG-35 or VLC. The only workaround I have found to date is to disable the capturing to VBI data by doing the following on an R5D1 implementation:
• ivtvctl --set-vbi=none • ivtvctl --set-vbi-embed=0 • Modify /etc/init.d/mythtv-backend so that the two ivtvctl commands are executed prior to “start� and “restart�.
• In myth setup, under general, 3rd screen, change the capture format from “NTSC-VBI� to “NTSC�.
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modemboy
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Posted: Fri Jan 26, 2007 1:34 pm |
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Joined: Thu Feb 24, 2005 1:36 am
Posts: 74
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Your interrupts look fine.
Good luck!
_________________ MythTV box: Opty 170, MSI K8NGM2-FID, 1.5 GB PC2700, Seagate 7200.10 400GB, Lite-On Combo drive. PVR-150, HDHomeRun. Antec Sonata, Freezer 64 Pro. Oh so quiet.
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pudding
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Posted: Fri Jan 26, 2007 8:10 pm |
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Joined: Wed Jan 11, 2006 11:08 pm
Posts: 14
Location:
NJ
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marc.aronson, that seemed to fix the problem perfectly! I gave mplayer a try, but it noticeably skipped and caught up with itself every few seconds...but it played much better than VLC, as you predicted.
I applied the fix you provided, and now it plays properly in VLC. Thank you!
modemboy, thanks for looking into this, too. 
_________________ KnoppMyth R5E50
Pentium 2 - Celeron
Hauppage PVR-150 (non-MCE)
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marc.aronson
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Posted: Fri Jan 26, 2007 9:41 pm |
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Joined: Tue Jan 18, 2005 2:07 am
Posts: 1532
Location:
California
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