HTPC DVB-T TV3 Glitchy Video

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EzyE

16 posts

Geek

#43240 19-Oct-2009 10:36

Sorry if this has been done recently, I had a search and didn't see anything.

Have finally got MediaPortal to decode TV correctly, and get perfect picture and sound on all channels but TV3. It's almost like the video is in slow motion, like it's moving through syrup, but only when an actual TV show is on, when it's ads the picture's fine O_o Any ideas?

Using MediaPortal with TV Server
PowerDVD9 H.264/AVC Codec for HD decoding.

Tech Specs-
AMD Athlon 64 3500+ running at 2.3GHz
2G RAM
Asus NVidia 9500gt
Hauppauge HVR-2200
Windows XP

Buttonmash

361 posts

Ultimate Geek
+1 received by user: 1

#265023 19-Oct-2009 12:02

Is it an issue with de-interlacing the 1080 stream?

davidcole

6099 posts

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+1 received by user: 1465

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#265033 19-Oct-2009 12:38

EzyE: Sorry if this has been done recently, I had a search and didn't see anything.

Have finally got MediaPortal to decode TV correctly, and get perfect picture and sound on all channels but TV3. It's almost like the video is in slow motion, like it's moving through syrup, but only when an actual TV show is on, when it's ads the picture's fine O_o Any ideas?

Using MediaPortal with TV Server
PowerDVD9 H.264/AVC Codec for HD decoding.

Tech Specs-
AMD Athlon 64 3500+ running at 2.3GHz
2G RAM
Asus NVidia 9500gt
Hauppauge HVR-2200
Windows XP

Hmmmm, only when show is on, and all shows or just DD 5.1 shows (the proper HD ones??) if just the 5.1s then it's probably something to do with the AC3 sound. Do yoi you have AC3Filter installed or something like that? or are you downmixing the ac3 to something else?

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EzyE

16 posts

Geek

#265111 19-Oct-2009 18:33

Buttonmash: Is it an issue with de-interlacing the 1080 stream?

That was my first thought, but how would I know if that was the case?

davidcole: Hmmmm, only when show is on, and all shows or just DD 5.1 shows (the
proper HD ones??) if just the 5.1s then it's probably something to do
with the AC3 sound. Do yoi you have AC3Filter installed or something
like that? or are you downmixing the ac3 to something else?

Yeah I'm using AC3Filter. It seems to be everything on TV3 (EXCEPT ads, haha), from the news to movies.

ZollyMonsta

3009 posts

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#265121 19-Oct-2009 19:09

I've seen similar on mine, but not restricted to TV3.. I'm running windows 7 RC, same TV card at EzyE, Quad Core Intel CPU... and in my case, using GBPVR... So maybe it's not just TV3 related.

davidcole

6099 posts

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+1 received by user: 1465

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#265133 19-Oct-2009 20:14

Newer version of ac3filter? It probably to do with timing, since the audio sets the timing of the video frames.

I thought I had this happen to me, and I'm sure I resolved by playing in ac3filter....maybe in the prefer ac3 decoder/prefer other filter section...

Tried watching the video purely in power dvd?

1gkar

722 posts

Ultimate Geek

#265377 20-Oct-2009 17:27

Is this happening with both LiveTV & recorded TV?

When watching LiveTV -or recorded TV- within Mediaportal, you can use shift+! to bring up a diagnostic tool which will tell you the if jitter is present & also any dropped frames & average FPS.

I also recommend recording a small segment of TV3 & use Graphedit to check the codec chain to make certain what you think is being used is actually what is being used. You can also do this with LiveTV.

For LiveTV, make sure MP is set to open in windowed mode -not fullscreen. Open Graphedit; file>connect to remote graph. Highlight, then OK.

For recorded TV, open Graphedit; file>render media file. Browse to file location & open.

If nothing appears unusual, then it may be to do with PowerDVD codec. I know some of the more recent versions are actively prevented from working with third party apps like Mediaportal. You could try an earlier version to see if that helps. I still use PowerDVD v7.3 ultra. I also DO NOT upgrade or update the PowerDVD codec for the above reason.

Another alternative are to try the trial pack of CoreAVC for comparison. This now has nVidia CUDA support.

Oh yeah, almost forgot: are you sure that the GPU is using DxVA. I use Process Explorer to test the CPU load when watching various media file types. If the load goes over around 20% for FreeviewHD, then DxVA is not being ustilised & the CPU load will be higher with a 1080i broadcast due to deinterlacing of the transmission.

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