NextPVR Forums
  • ______
  • Home
  • New Posts
  • Wiki
  • Members
  • Help
  • Search
  • Register
  • Login
  • Home
  • Wiki
  • Members
  • Help
  • Search
NextPVR Forums Public NextPVR Support Legacy (v4.x and earlier) v
« Previous 1 … 395 396 397 398 399 … 433 Next »
Is there a way to fine-tuning image quality

Is there a way to fine-tuning image quality
DavidB
Offline

Junior Member

Posts: 22
Threads: 6
Joined: Nov 2010
#1
2010-12-03, 11:28 PM
Thanks to great help I've received from folks on this board, I have nPVR working well now, with the program guide set up and the remote working.

Now, I'd like to see if I can get a slightly better picture. I'm using ffdshow as the codec with U.S. OTA broadcasts. When there is little motion in the scene the picture is absolutely beautiful: detailed, vivid, crisp. But when something moves quickly, the edges of the moving object or person get heavily pixelated, and if the whole scene is moving (during a fast pan, for example) the image sometimes breaks up and then re-stabilizes when the image is no longer moving so much.

Another issue is that on some TV channels, I get video noise right at the top border of the active video area, basically a line of flashing junk just a few pixels wide. These seems to vary; a problem on some stations not others. More likely to be a problem on a dark background.

The other decoders (besides FFDSHOW) that show up in my installation are nanocosmos, main concept, arcsoft, and intervideo nonCSS. None of these really work.

Are there other decoders that could be better? Where do I find them? Is there anything in my configuration other than the decoder that could be causing the image degradation related to motion. I do understand a bit about MPEG and I know that when things are moving the bit rate can go up -- so perhaps the issue not with the decoder but with bottlenecks elsewhere in the set up??? My faster graphics card is on order but hasn't come yet.

Any suggestions?

Thanks,
David
----------------------------------------------------------------------------------------
Dell Dimension 4600 / Windows XP SP3 / 750MB RAM / 2.4 gHz Pentium 4
Radeon 9600 graphics card (AVG) with latest drivers
nPVR version 1.5.33 / Hauppage HVR 1600 PCI card
Using ffdshow for mpeg2 video decoding and AC3 for audio.
Located in San Francisco U.S. Viewing and recording OTA only
sub
Online

Administrator

NextPVR HQ, New Zealand
Posts: 106,732
Threads: 767
Joined: Nov 2003
#2
2010-12-03, 11:36 PM
Is the Radeon 9600 upto HDTV? Its a pretty old card now.

I'm not sure when it comes to ATI cards, but I remember nvidia cards from the would struggle unless you went for the more up-spec modesl (like Nvidia 6600GT being for 1080i/720p, wheras Nvidia 6200 wasnt up to the task). With some of these slower cards they didnt have the memory bandwidth to pass all the HDTV pixels required per second.
sub
Online

Administrator

NextPVR HQ, New Zealand
Posts: 106,732
Threads: 767
Joined: Nov 2003
#3
2010-12-03, 11:37 PM
Quote:When there is little motion in the scene the picture is absolutely beautiful: detailed, vivid, crisp. But when something moves quickly, the edges of the moving object or person get heavily pixelated, and if the whole scene is moving (during a fast pan, for example) the image sometimes breaks up and then re-stabilizes when the image is no longer moving so much.
This sounds like you might need to turn on Deinterlacing in the ffdshow settings.
Reddwarf
Offline

Posting Freak

Posts: 6,629
Threads: 230
Joined: Mar 2007
#4
2010-12-03, 11:56 PM
sub Wrote:This sounds like you might need to turn on Deinterlacing in the ffdshow settings.

Definitly yes. I'd also recommend trying the decoders in SD Pack and HD Pack (download from dvbsupport.net), I had success with the Cyberlink decoders and ATI cards.

"I'd rather have a bottle in front of me than a frontal lobotomy"
DavidB
Offline

Junior Member

Posts: 22
Threads: 6
Joined: Nov 2010
#5
2010-12-04, 12:28 AM
Quote:This sounds like you might need to turn on Deinterlacing in the ffdshow settings.

There are more than a dozen different deinterlacing options. Any particular one that you recommend?

Regarding the card, I have a Radeon HD 3650 on order, so we'll see in a few days if that does noticeably better.

Thanks,
David
----------------------------------------------------------------------------------------
Dell Dimension 4600 / Windows XP SP3 / 750MB RAM / 2.4 gHz Pentium 4
Radeon 9600 graphics card (AVG) with latest drivers
nPVR version 1.5.33 / Hauppage HVR 1600 PCI card
Using ffdshow for mpeg2 video decoding and AC3 for audio.
Located in San Francisco U.S. Viewing and recording OTA only
sub
Online

Administrator

NextPVR HQ, New Zealand
Posts: 106,732
Threads: 767
Joined: Nov 2003
#6
2010-12-04, 12:39 AM
DavidB Wrote:There are more than a dozen different deinterlacing options. Any particular one that you recommend?
I dont have the ffdshow decoder installed at the moment, and cant remember the various options. Any of them should work though. Try bob first, and try others if you need to.

Quote:Regarding the card, I have a Radeon HD 3650 on order, so we'll see in a few days if that does noticeably better.
I think this will help.
johnsonx42
Offline

Posting Freak

Posts: 7,298
Threads: 189
Joined: Sep 2008
#7
2010-12-04, 01:08 AM
once you get the 3650, download the ati AVIVO pack. that will install the ATI MPEG-2 Decoder, which I've found works pretty well. You'll also find various video playback settings, including de-interlacing, in the Catalyst Control Center.
server: NextPVR 5.0.7/Win10 2004/64-bit/AMD A6-7400k/hvr-2250 & hvr-1250/Winegard Flatwave antenna/Schedules Direct
main client: NextPVR 5.0.7 Desktop Client; LG 50UH5500 WebOS 3.0 TV
Reddwarf
Offline

Posting Freak

Posts: 6,629
Threads: 230
Joined: Mar 2007
#8
2010-12-04, 01:41 AM
johnsonx42 Wrote:once you get the 3650, download the ati AVIVO pack. that will install the ATI MPEG-2 Decoder, which I've found works pretty well. You'll also find various video playback settings, including de-interlacing, in the Catalyst Control Center.

And remember to get the 10a version of catalyst.

"I'd rather have a bottle in front of me than a frontal lobotomy"
DavidB
Offline

Junior Member

Posts: 22
Threads: 6
Joined: Nov 2010
#9
2010-12-04, 01:49 AM
I just switched on de-interlacing and it makes a huge difference. Thanks.
----------------------------------------------------------------------------------------
Dell Dimension 4600 / Windows XP SP3 / 750MB RAM / 2.4 gHz Pentium 4
Radeon 9600 graphics card (AVG) with latest drivers
nPVR version 1.5.33 / Hauppage HVR 1600 PCI card
Using ffdshow for mpeg2 video decoding and AC3 for audio.
Located in San Francisco U.S. Viewing and recording OTA only
johnsonx42
Offline

Posting Freak

Posts: 7,298
Threads: 189
Joined: Sep 2008
#10
2010-12-04, 02:58 AM
Reddwarf Wrote:And remember to get the 10a version of catalyst.
actually the current agp driver is 10.11 hotfix: http://support.amd.com/us/kbarticles/Pag...otfix.aspx
server: NextPVR 5.0.7/Win10 2004/64-bit/AMD A6-7400k/hvr-2250 & hvr-1250/Winegard Flatwave antenna/Schedules Direct
main client: NextPVR 5.0.7 Desktop Client; LG 50UH5500 WebOS 3.0 TV
« Next Oldest | Next Newest »

Users browsing this thread: 1 Guest(s)

Pages (2): 1 2 Next »


Possibly Related Threads…
Thread Author Replies Views Last Post
  NextPVR hangs when tuning to offline channel? CormacBaptiste 2 1,945 2021-02-03, 01:29 PM
Last Post: Graham
  NextPVR hangs when tuning to offline channel madbrain 2 1,769 2020-07-06, 09:09 PM
Last Post: madbrain
  quality degraded in nextpvr ydekmekji 1 1,095 2019-11-01, 02:38 AM
Last Post: sub
  Low signal quality uanmi 3 1,838 2019-09-09, 06:33 AM
Last Post: uanmi
  NPVR works fine using webui, but kodi will not load any channels. relink2013 9 4,884 2019-05-31, 07:32 PM
Last Post: mvallevand
  Help Pls - Working fine on Server PC but not on other devices furball 14 3,540 2019-05-02, 09:44 AM
Last Post: sub
  Background image for NextPVR UI Reddwarf 2 1,099 2019-03-20, 08:53 PM
Last Post: Reddwarf
  4.2.4 can't download EPG XML, but the URL works fine in Chrome sgilani 2 1,872 2019-03-12, 06:53 AM
Last Post: sgilani
  IPTV Live TV Stutter, Recordings Fine SLR_65 1 1,162 2018-12-24, 09:51 PM
Last Post: SLR_65
  New 300mbit down/upload internet connection and looking for best possible quality gunrunner 4 1,707 2018-11-01, 03:36 PM
Last Post: gunrunner

  • View a Printable Version
  • Subscribe to this thread
Forum Jump:

© Designed by D&D, modified by NextPVR - Powered by MyBB

Linear Mode
Threaded Mode