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| dapab |
| Posted: Jun 27 2013, 11:12 PM |
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Newbie
Group: Members
Posts: 2
Member No.: 36728
Joined: 27-June 13
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I know so very little about virtual dub -would appreciate answers that spell out what I'm meant to do!
Have a colour day&night IR colour security camera that provides a good quality colour image plugged into our tv (UK)
It has the following specs: effective picture elements PAL 976x582, horizontal resolution 700 tv lines, clock frequency 36 MHz, scanning system 2:1 interface.
This connects to a Kworld DVB-T 100 PCI card and the camera plugs into the composite port via a RCA video cable (device shows as DigiGo DVBT 2388x video capture (directshow)
When I capture AVI the image shows as black and white (should be colour), is rather grainy and has horizontal curved hashing lines that sometimes wanders up the screen.
On capture settings I set video source: video composite, the capture filter to PAL-D - lines detected is 625
I've tried preview acceleration -interlaced frames, also set deinterlace filters but I think my problems are more basic than that
Thanks
David |
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| Abrazo |
| Posted: Jun 28 2013, 06:57 AM |
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Advanced Member
Group: Members
Posts: 775
Member No.: 28995
Joined: 5-November 10
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Probably has something to do with the selection of the correct PAL system.
Maybe you should try with PAL-I (582 lines instead of 576).
See Wikipedia, table with PAL Broadcast systems:
> https://en.wikipedia.org/wiki/PAL |
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| dapab |
| Posted: Jun 28 2013, 10:31 AM |
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Newbie
Group: Members
Posts: 2
Member No.: 36728
Joined: 27-June 13
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I have tried all the PAL capture filters (PAL-D, PAL-I etc) and no change. Is it something to do with the 700 lines on the video security camera?
Thanks
David |
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| Abrazo |
| Posted: Jun 28 2013, 10:49 AM |
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Advanced Member
Group: Members
Posts: 775
Member No.: 28995
Joined: 5-November 10
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Let's hope that someone else has more experience with this and can give you some advise.
What you already could try is to connect a VHS- or DVD-videoplayer to your Kworld PCI-card and look if this makes a difference when capturing in VirtualDub.
If it does, than you should indeed look out for a solution on the camera level. |
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| super_copy |
| Posted: Nov 13 2013, 10:18 AM |
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Newbie
Group: Members
Posts: 7
Member No.: 25509
Joined: 6-May 09
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I think the 700 lines is the horizontal resolution. That should only tell you how much horizontal detail you can get and capture from the camera.
The fact that you have lines moving up the screen and no color, indicates to me that the capture card is not matching the timing and/or TV system of the camera. Try adjusting the fps ("frames per second") setting. On VirtualDub 1.8.8, it's on the bottom status bar of the "capture avi" window; the "fps" button is clickable. |
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| phaeron |
| Posted: Nov 17 2013, 10:46 PM |
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Virtualdub Developer
Group: Administrator
Posts: 7773
Member No.: 61
Joined: 30-July 02
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The settings in VirtualDub's interface aren't going to help here. FPS, in particular, will have no bearing on signal decoding. It just controls how often frames get pulled out of the incoming stream. Any options that would help would all be under Capture Filter. I'd agree that the most likely issue here is a PAL system mismatch -- the most likely issue would be that the driver might be able to detect the specific PAL format in use, but the hardware might not be able to support it. However, PAL-D doesn't look sufficiently different from PAL-I for video, so I'm not sure what's up here.
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