cctv cam k-world usb encoder problem
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myname - Posts: 3
- Joined: Wed Jun 19, 2013 10:59 am
cctv cam k-world usb encoder problem
Consider buying your software but I have a problem I have two cameras a web logitech usb that works okay and a cctv cam with kworld Video encoder that is also recognized as usb 2800 on set up but I have not picture and give me a msg 'camera could not connect'(i have check with other software and its ok) Thanks in advance and sorry for my english..
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ryan - Posts: 1015
- Joined: Wed Aug 25, 2010 2:52 pm
- Location: Palo Alto, California
Re: cctv cam k-world usb encoder problem
Do you know what resolutions the encoder supports? It is likely that it only supports few, or even a single resolution, which you are unable to select in the free version.
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myname - Posts: 3
- Joined: Wed Jun 19, 2013 10:59 am
Re: cctv cam k-world usb encoder problem
Yes that I was thinking to, that something is wrong with the analysis, and with the other software i try again, the encoder does not work ok
especially with resolutions lower than 640x480.
especially with resolutions lower than 640x480.
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ryan - Posts: 1015
- Joined: Wed Aug 25, 2010 2:52 pm
- Location: Palo Alto, California
Re: cctv cam k-world usb encoder problem
Please check the email account associated with your forum account, I sent you a temporary license that will allow you to test your camera to ensure it works before purchasing.
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myname - Posts: 3
- Joined: Wed Jun 19, 2013 10:59 am
Re: cctv cam k-world usb encoder problem
Hi, Thanks for your help, i try the rest resolutions but the same "Could not connect" error..
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ryan - Posts: 1015
- Joined: Wed Aug 25, 2010 2:52 pm
- Location: Palo Alto, California
Re: cctv cam k-world usb encoder problem
Hiya, can you send me a link to the exact product you are trying to use?
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Semper Vaporo - Posts: 331
- Joined: Sat Oct 09, 2010 11:51 am
Re: cctv cam k-world usb encoder problem
I have reported in this forum a couple of times that connecting TWO USB cams of the same make and model at the same time is a problem. I have 4 USB cams in use, and I have bought nearly a dozen others (mostly really cheap models), but I can only get one of any one brand/model to work simultaneously with an other of the SAME brand/model.
I do have two Logitec cams working simultaneously but one is a cheap model and the other is a higher-end model. I have tried several Microsoft cams and other brands (HP, iWorks, etc.) and only one of each brand will work at a time with other brands and not at all with cams of the same brand.
Personally, I think it is a problem with the software driver for web cams (NOT a problem with VDV). Each manufacturer makes their own driver software and none of them enumerates separate instances of similar devices ("who'd ever have two web cams?" seems to be the mentality), but because each brand has their own driver, each of them gets a different name. I think it is because each camera gets the same name when it is plugged in and recognized by the driver software. Thus when any program (not just VDV) requests a link to that name, the driver cannot determine which one it should be.
When I have tried to use two similar cams, I sometimes can get an image to show up for each camera, but they will randomly swap images. Sometimes both VDV thumbnail images showing just one cam and sometimes the other one, or the CAM #1 thumbnail will show the CAM #2 image and vice versa... usually after a few seconds, I get a BSoD or the computer will spontaneously reboot. Sometimes it all just goes dead and I hear the CPU fan speed up to handle some sort of overheat condition because things have gone so awry. (This all happens when using various versions of AMCAP and other webcam software, not just VDV.)
I am not near my surveillance PC right now or I could look up the models I have running (and the ones I have tried), but from my experience, getting two of the same brand to work together is "iffy" at best.
With the two Logitec cams I am using it also matters which one I start first. With VDV, I have to start each camera individually and not use the built-in feature to start all the cameras at once. One of the Logitec cams will be unable to connect if I do. I have not done this enough to come to any conclusions about it (the systems is working fine so I seldom have to reboot, so there has been no reason to experiment to find out why it happens).
I have also had problems with apparent "overloading" of the USB ports. Again, my personal explanation is that each "set" of USB ports is run from a single interface (there are hardware driver chips for each socket, but they are connected in groups of 4 [I think] to a single interface chip that connects to the computer's main data bus) and of those 4, only 3 can be assigned to a "high density" data device (done by the OS and/or hardware, with no control by the user). If you plug in 4 cams into ports that are all connected internally to one interface chip then one of the 4 will be non-functional. I have 7 USB sockets on my PC, but I can only use 6 of them for cameras... 3 on each of the interface chips. Plug in that 7th camera and it won't work. Unplug any of the other cameras on that "set" of 4 sockets and that new cam will now work, but plug the one back in again and then it won't work.
BTW: I have used three different PCs, with Windows XP in the 1st one and Windows 7 in the next two and all had the same problems. I have no experience using a MAC so I don't know if it would have a similar problems.
I do have two Logitec cams working simultaneously but one is a cheap model and the other is a higher-end model. I have tried several Microsoft cams and other brands (HP, iWorks, etc.) and only one of each brand will work at a time with other brands and not at all with cams of the same brand.
Personally, I think it is a problem with the software driver for web cams (NOT a problem with VDV). Each manufacturer makes their own driver software and none of them enumerates separate instances of similar devices ("who'd ever have two web cams?" seems to be the mentality), but because each brand has their own driver, each of them gets a different name. I think it is because each camera gets the same name when it is plugged in and recognized by the driver software. Thus when any program (not just VDV) requests a link to that name, the driver cannot determine which one it should be.
When I have tried to use two similar cams, I sometimes can get an image to show up for each camera, but they will randomly swap images. Sometimes both VDV thumbnail images showing just one cam and sometimes the other one, or the CAM #1 thumbnail will show the CAM #2 image and vice versa... usually after a few seconds, I get a BSoD or the computer will spontaneously reboot. Sometimes it all just goes dead and I hear the CPU fan speed up to handle some sort of overheat condition because things have gone so awry. (This all happens when using various versions of AMCAP and other webcam software, not just VDV.)
I am not near my surveillance PC right now or I could look up the models I have running (and the ones I have tried), but from my experience, getting two of the same brand to work together is "iffy" at best.
With the two Logitec cams I am using it also matters which one I start first. With VDV, I have to start each camera individually and not use the built-in feature to start all the cameras at once. One of the Logitec cams will be unable to connect if I do. I have not done this enough to come to any conclusions about it (the systems is working fine so I seldom have to reboot, so there has been no reason to experiment to find out why it happens).
I have also had problems with apparent "overloading" of the USB ports. Again, my personal explanation is that each "set" of USB ports is run from a single interface (there are hardware driver chips for each socket, but they are connected in groups of 4 [I think] to a single interface chip that connects to the computer's main data bus) and of those 4, only 3 can be assigned to a "high density" data device (done by the OS and/or hardware, with no control by the user). If you plug in 4 cams into ports that are all connected internally to one interface chip then one of the 4 will be non-functional. I have 7 USB sockets on my PC, but I can only use 6 of them for cameras... 3 on each of the interface chips. Plug in that 7th camera and it won't work. Unplug any of the other cameras on that "set" of 4 sockets and that new cam will now work, but plug the one back in again and then it won't work.
BTW: I have used three different PCs, with Windows XP in the 1st one and Windows 7 in the next two and all had the same problems. I have no experience using a MAC so I don't know if it would have a similar problems.
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ryan - Posts: 1015
- Joined: Wed Aug 25, 2010 2:52 pm
- Location: Palo Alto, California
Re: cctv cam k-world usb encoder problem
Hi Semper,
Multiple cameras at once - Running multiple USB cameras of the same model is supported and order should be remembered as well, though this can change if the cameras are disconnected and reconnected. You are correct, however, that drivers can change everything, and drivers included with the cheapest hardware are usually not the highest quality (as you've found from your BSoD/rebooting/image swapping).
Number of USB devices per port - You're going to hit two issues with this. The first is bandwidth, the amount of data passing through each port simultaneously has a limit. The maximums change between USB1.0, 2.0, etc... and can be limited again by your drivers and CPU availability. The second concern (and what people usually run into first) is power. USB devices typically run off of power pulled from the USB port rather than having additional power cables of their own, and USB ports are only designed to give a certain amount of power. This can often be worked around by plugging items into an external USB hub that has it's own power source (not simply a USB splitter).
Multiple cameras at once - Running multiple USB cameras of the same model is supported and order should be remembered as well, though this can change if the cameras are disconnected and reconnected. You are correct, however, that drivers can change everything, and drivers included with the cheapest hardware are usually not the highest quality (as you've found from your BSoD/rebooting/image swapping).
Number of USB devices per port - You're going to hit two issues with this. The first is bandwidth, the amount of data passing through each port simultaneously has a limit. The maximums change between USB1.0, 2.0, etc... and can be limited again by your drivers and CPU availability. The second concern (and what people usually run into first) is power. USB devices typically run off of power pulled from the USB port rather than having additional power cables of their own, and USB ports are only designed to give a certain amount of power. This can often be worked around by plugging items into an external USB hub that has it's own power source (not simply a USB splitter).