Download SupervisionCam 3.2.2.4
May 31, 2011 (1100k)

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Frequently asked questions (FAQs)

Question: 

Can I use more than one camera? 

Answer:

SupervisionCam work with multiple cameras simultaneously. Select "Configuration", "New" to open a new configuration for an new camera. The hardware configuration can be a problem because some capture drivers don't support more than one device of the same type in one computer. The maximum of supported cameras depends on the system parameters and the selected settings. It is possible to combine configurations with hardware based capture devices and configurations with URL based image sources (other Internet WebCams or WebCams with an integrated HTML server).

This screenshot uses the following sources:
  1. Nvidia.svc: GeForce4 MX 460 with analog camera connected to the video input
  2. USB1.svc: TerraCam Pro (1. USB camera)
  3. USB2.svc: TerraCam Pro (2. USB camera)
  4. WebCam1.scv: image source 
  5. WebCam2.svc: image source 
  6. LiveView.svc: TV board with analog camera


Question: 

Do you have any recommendations on capture devices that allow to access multiple cameras?

Answer:

Please understand that I cannot give you detailed information about working hardware components. The market is changing too fast.
Usually New USB cameras should work if you select the WDM/Direct Show driver. It is not a problem to use the same type of camera several times, because SupervisionCam enumerates all and give them a unique name. The maximum of such cameras is limited by the USB (1.1) bandwidth and therefore also of the settings for these cameras. 
For instance: I can use 4 USB cameras with a resolution of 320*240, if I compare the images every 0.5 seconds. If I need more cameras, a higher resolution or refresh rate, I can add a second USB controller (not a hub). Some newer motherboards already have 2 integrated USB controllers. You can check the current USB bandwidth usage, if you open the device manager and check the properties for the USB controller.
It is also possible to work with more than one PCI based capture devices. I tested SupervisionCam successfully on a PC with 4 TV boards with a Philips chipset.

Question: 

Can I use a PCI capture board with 4 or more analog input channels?

Answer:

SupervisionCam will work at least with one input channel. Starting with version 3.03 SupervisionCam is also able to support all channels if the device driver is WDM based. After configuring the first channel, open a new configuration ("Configuration", "New") and select the same device with the next input channel. 
Hint: Some TV boards can be used as a 2 channel capture device, if they have separate inputs for Composite Video and S-VHS (the TV tuner may be the 3. channel that can be used with special hardware). It is also possible to connect two analog cameras to one S-VHS input with some boards. But this requires exact knowledge of the hardware, a special cable and at least some registry modifications.
Hint: The switching from one to the next channel takes some milliseconds to resynchronize the image. SupervisionCam uses the default wait value of 300 milliseconds. You can change this if you close SupervisionCam, open the configuration files *.svc with a text editor like notepad and change the value for "Wait time for channel synchronization".
This feature is not supported for old Video for Windows drivers.

Question:

SupervisionCam uploads only 50 images to the server. Is this a bug?

Answer:

No. The source file for the HTML protocol is also the script for the FTP upload and the default sample "Source.htm" reduces the number to 50. Search in the document the text "TableEntryStart Max = 50" and change it to the number you prefer. If you remove "Max = " SupervisionCam uploads all images.

Question:

My camera has a high noise especially in dark environment. I don't find settings that allow a day and night surveillance. Any suggestions?

Answer:

Please try a resolution of 24 bit per pixel for your capture device. This resolution contains the most detailed image information.