Audio Lagging Behind Video After Changing Channels

MacMini · 2008-01-17, 05:12

TV-Server Version: None
MediaPortal Version: 0.2.3.0 SVN
MediaPortal Skin: Monochrome (latest)
Windows Version: Vista Ultimate
CPU Type: Intel Core 2 Duo, 2.0
HDD: 80gb 2.5" internal/ 2tb NAS
Memory: 2gb
Motherboard: AOPEN MP965-DR
Motherboard Chipset: GMA 965 Integrated graphics
Motherboard Bios:
Video Card: GMA 965 Integrated graphics
Video Card Driver: latest
Sound Card: onboard
Sound Card AC3: SPDIF out
Sound Card Driver:
1. TV Card: HDHomeRun
1. TV Card Type: Hauppauge WinTV 950
1. TV Card Driver: latest Vista Beta
2. TV Card:
2. TV Card Type:
2. TV Card Driver:
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec: Cyberlink 7.3, ffdshow, DScaler, MPA
MPEG2 Audio Codec: AC3Filter, Cyberlink 7.3, ffdshow, DScaler
Satelite/CableTV Provider: Analog Cable, OTA HD
HTPC Case:
Cooling:
Power Supply:
Remote: MX-850
TV: Pioneer 60" Plasma Kuro
TV - HTPC Connection: DVI/HDMI

When I first turn on My TV, everything is fine.

But once I change the channel, the audio starts lagging. The more changes, the worst it lags.

It seems that when I change the channel, the picture of the new channel appears first, while the audio from the old channel is still going. A split second later, the audio of the new channel comes in.

I've tried every codec I have.

I have selected Default DirectSound Device in MediaPortal - Setup.

It does this regardless of what drive I point Mp to use for time-shifting.

Any ideas how to fix this?

(logs attached.)

(using the latest svns for both MP and TVServer.)

MacMini · 2008-01-17, 21:26

Forgot to add that I have clicked off the HDHomeRun tuners in TVServer's settings, and have scanned only the analog channels with the Hauppauge WinTV 950 (which is setup as a "Hybrid" card in TVServer setup.)

(The reason why have to use analog, is that I've cancelled my satellite s-ce, since I never watched it, and kept only basic cable (without a box.)

For what it's worth, trying Sage, there is no lag or any other issue, so I don't think it's my codecs or system. And no, I don't really want to use Sage (way too ugly and random:-)

MacMini · 2008-01-20, 20:14

Anyone else with this problem?

Or better, anyone with a possible solution?

tomtom21000 · 2008-01-20, 20:29

I have the same problem with my analog card.
It works better and acceptable when timeshift is turned to on.

tomtom

MacMini · 2008-01-27, 09:53

thanks, tomtom21000.

Tried it with timeshift on, but it still lags just the same.

Any chance a developer can take a look at this?

As I mentioned above, it seems that when changing the channel, the picture changes first, then the audio changes after, and this accumulates and gets worse every time there is a channel change. The only way to fix it, is to stop TV, then start it. Then everything stays in sync, until I change the channel.

Thanks.

MacMini · 2008-02-17, 09:59

O.K., with the latest SVNs, I get audio lagging a little even without changing the channel.

But when I change the channel, it goes out by a few seconds!

Again, when I press the channel button on the remote, there is a pause in the audio - then the video changes to the newly selected channel, but the old channel audio comes back for a second - then it changes to the new channel, and it lagging behind the video.

Can anyone figure out what's going on and if there is a way to fix it?

2008-01-20, 20:29	#4 (permalink)
tomtom21000 Retired Team Member Join Date: Apr 2004 Location: Germany Posts: 1,034 Thanks: 8 Thanked 7 Times in 7 Posts My System	I have the same problem with my analog card. It works better and acceptable when timeshift is turned to on. tomtom __________________

2008-01-27, 09:53	#5 (permalink)
MacMini Portal Member Join Date: May 2006 Posts: 211 Thanks: 22 Thanked 0 Times in 0 Posts My System	thanks, tomtom21000. Tried it with timeshift on, but it still lags just the same. Any chance a developer can take a look at this? As I mentioned above, it seems that when changing the channel, the picture changes first, then the audio changes after, and this accumulates and gets worse every time there is a channel change. The only way to fix it, is to stop TV, then start it. Then everything stays in sync, until I change the channel. Thanks. Last edited by MacMini; 2008-01-27 at 09:57.

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2008-01-17, 21:26	#2 (permalink)
MacMini Portal Member Join Date: May 2006 Posts: 211 Thanks: 22 Thanked 0 Times in 0 Posts My System	Forgot to add that I have clicked off the HDHomeRun tuners in TVServer's settings, and have scanned only the analog channels with the Hauppauge WinTV 950 (which is setup as a "Hybrid" card in TVServer setup.) (The reason why have to use analog, is that I've cancelled my satellite s-ce, since I never watched it, and kept only basic cable (without a box.) For what it's worth, trying Sage, there is no lag or any other issue, so I don't think it's my codecs or system. And no, I don't really want to use Sage (way too ugly and random:-)

2008-01-20, 20:14	#3 (permalink)
MacMini Portal Member Join Date: May 2006 Posts: 211 Thanks: 22 Thanked 0 Times in 0 Posts My System	Anyone else with this problem? Or better, anyone with a possible solution?