Multiple USB Camera's

I want to use two USB web cam's (Both Agent V6 from Liquiddigital) on my Mac Mini.
All programs show both cam's but whatever I choose I see images from one of them.
How can I make OSx support both cam's at the same time?

Addition to my previous question; If I have just one application using a webcam, I can switch to the other but when one of the camera's is in use by an application I can't have another application use the other.
The reason that I'm posting this question is that I'd like to use the SKJM Icam software for remote monitoring multiple webcam's on my iPhone but it seems that OSx only supports one webcam at a time.

Similar Messages

Hang/delay starting up multiple USB cameras?

This one has been going on for a while, but it's been inonsistent in behavior with different computers and different configurations.
Our Flex application uses two cameras, user selectable from our interface. I've got a stripped down version of the code (done as a web app from Flash Builder) that I've pasted below. It has two dropdowns to select the cameras, and a preview display area for the selected camera.
It appears that, depending on the USB bus configuration and where the cameras are, it will either work correctly or hang for an indeterminate amount of time (usually over 30 seconds) when a second USB camera is selected. I've been able to reproduce this fairly consistently if both cameras are plugged into a hub. On other computers in our office, it will work with the cameras plugged into one set of ports but hang when one of the cameras is moved to another port.
Another note, if I leave the camera in default mode (320x240, 15FPS) everything seems to work consistently. If I leave the resolution at 320x240 and change the frame rate to 30FPS, it also works. However, if I change the resolution to 640x480, it will have the delay.
Any suggestions on this? Yes, we need to have both cameras, and yes they need to be 640x480.
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               minWidth="955" minHeight="600"
               creationComplete="onInit(event)">
    <fx:Declarations>
        
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayList;
            import mx.events.FlexEvent;
            import spark.events.IndexChangeEvent;
            [Bindable] private var cameraList:ArrayList;
            protected function onInit(event:FlexEvent):void {
                cameraList = new ArrayList(Camera.names);
            protected function onCamera1Change(event:IndexChangeEvent):void {
                var cam:Camera = Camera.getCamera(event.newIndex.toString());
                cam.setMode(640, 480, 15);
                cam1Preview.attachCamera(cam);
            protected function onCamera2Change(event:IndexChangeEvent):void {
                var cam:Camera = Camera.getCamera(event.newIndex.toString());
                cam.setMode(640, 480, 15);
                cam2Preview.attachCamera(cam);
        ]]>
    </fx:Script>
    <s:HGroup width="100%" height="100%" paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10" gap="10">
        <s:VGroup width="100%" height="100%" horizontalAlign="center" gap="10">
            <s:Label text="Camera 1"/>
            <s:DropDownList id="cam1List" dataProvider="{cameraList}" change="onCamera1Change(event)" width="100%"/>
            <mx:VideoDisplay id="cam1Preview" width="320" height="240"/>
        </s:VGroup>
        <s:VGroup width="100%" height="100%" horizontalAlign="center" gap="10">
            <s:Label text="Camera 2"/>
            <s:DropDownList id="cam2List" dataProvider="{cameraList}" change="onCamera2Change(event)" width="100%"/>
            <mx:VideoDisplay id="cam2Preview" width="320" height="240"/>
        </s:VGroup>
    </s:HGroup>
</s:Application>

Dear everyXnewXday,
I'm as mystified as you are. This sounds exactly like my issue. Have you tried starting up in Verbose mode (hold down cmd-V on startup)? This will give you a running log of events that occur during startup, and may indicate where errors are occurring that the operating system has to resolve or work around in order to proceed. I'm no expert in interpreting this information, though, which is why I posted this question in the event others have ideas about how to reduce the amount of computational "red tape."
Do you have many external drives or other peripherals connected to your computer? One thing I have noticed in the startup sequence is that the OS has some difficulty recognizing or mounting some of them (in particular, a Seagate FreeAgent USB drive). Not sure if this is a driver issue, but I believe I have the most current drivers for all my external drives.
- K725

Synchronized capture for multiple USB cameras

I need to capture images from 8 USB cameras at the same time. I don't need to continuously acquire images (just one set every few seconds), but I need the 8 cameras to capture at very close to the same exact time. Just testing with two cameras at the moment, and one camera always seems to capture about 0.4 seconds after the other. Attached is the current VI I'm testing with.
Any idea how to speed this up? I thought having both grab.vi's in a separate frame would help make them occur at the same time, but it's still a lot slower than I hoped for. Thanks for any suggestions.
Attachments:
Grab USB frame manual.vi ‏46 KB

All depends from precision. 100 ms is not bad result. For better precision I would like to suggest to use cams with external triggers. The cameras with USB interface are also available, for example:
http://www.thorlabs.de/newgrouppage9.cfm?objectgroup_id=2916
http://www.edmundoptics.com/products/displayproduct.cfm?productid=3356
http://www.ptgrey.com/news/pressreleases/details.asp?articleID=230
Otherwise they may be incompatible with IMAQdx (the only DirectShow compliant cameras are supported). Point Gray Chameleon seems to be DirectShow compatible.

MAX cannot find two usb cameras at same time

Hi,
I want to use two usb cameras (Thorlabs DCC 1545M) in NI-IMAQdx in Labview, but it can only find one camera (the one plugged in earlier), and also only one camera is shown in MAX. Both cameras works in the software from the manufacturer, and if I unplug the 1st camera, the 2nd will show up in MAX after a refresh.
I found online that up to one camera is supported for each USB hub in Labview, and all USB ports in this computer are corresponding to a same hub. I don't know if this is causing the problem.
Actually I don't need to take picture in both cameras at the same time, a programmed switch between the two cameras will work for me.
Any suggestion and comment will be appreciated.
Solved!
Go to Solution.

Hello JYang,
According to this link, you can acquire from multiple USB cameras simultaneously. The limitation is on the manufacturer and how they interface with the DirectShow bus. When you are using two cameras of the same make and model, it is sometimes the case that not enough information is present for IMAQdx to distinguish between the two cameras. When you switch the cameras in MAX, do they come in as different cameras, or do they show up virtually the same?
Since you said switching between them would work, I found an example that does just that. Just make sure to give each camera a unique camera name. Hopefully this will be useful for you.
Also, there is quite a bit of discussion on this topic available on the discussion forum already. Check out these related threads, or use the Search box to search for more. There is quite a lot of information available!
http://forums.ni.com/t5/LabVIEW/multiple-USB-cameras-in-Labview/m-p/833517
http://forums.ni.com/t5/Machine-Vision/two-USB-camera-identification/m-p/2193960
http://forums.ni.com/t5/Machine-Vision/Synchronized-capture-for-multiple-USB-cameras/td-p/1879647
http://forums.ni.com/t5/LabVIEW/Multiple-USB-Camera-Image-Acquisition-using-Vision-Acquisition/td-p/...
Patrick
CLA

Lightning to SD Card Camera Reader OR Lightning to USB Camera Adapter?

I should buy one or the other for a Nikon D3100 since they are sold separately nowadays. Which is the best choice? Considering the (not so good) reviews for both of them, I have the impression that the USB camera adapter is more universal and less prone to problems...

All my pro camera presently use Compact Flash cards. I've never had a problem using the Lightning to USB Camera Adapter with any of my cameras.
the choice you make should be based on what is most convenient for you. If you have multiple Cameras or have a camera with a card other than an SD then the choice is obvious.

Multiple USB webcams in Flash Player 10

How to set up multiple USB webcams for flash player 10 on OSX Leopard? There is only one item appearing in the player's webcam list as "USB Video Class Video" although I have 3 cameras attached on my mac. (Macbook Pro 2,4 GHz Core 2 Duo)
When I use VMWare with Window XP SP3, the system detects all my webcams and I see 3 webcams in the player's list but I only get one cam's signal as clicking on each list item.

IS this what your trying to accomplish its done in flash but I am trying to figure out HOW
I am really fustrated tyring to figure out how it done.
I know it can be done I use to broadcast my cam on that website, but I want to make my own website and do it for myself. I know it flash cause when I load up the flash player on my desktop it says show. settings have the allow and deny buttons, drop down menu you select which webcam you want for which webcam is installed I can have more screen shots of what they have created many someone know how it was done.

Two-USB camera identification

Hi everyone. I have two same USB cameras wanted to connected to the computer. The two cameras are same and use the same driver to install on computer. When I want to use MAX or IMAQdx Open.vi to connect the camera I can only find one camera connected on my computer. So are there any ways to get this two cameras identified by LabVIEW and then I can use them to capture images at the same time. Thank you very much!

Hi
To acquire from multiple cameras in LabVIEW, you must enumerate the list of cameras with the IMAQ USB/Imaqdx Enumerate Cameras VI. Then a session can be opened for each different camera.
Check this may helps you http://digital.ni.com/public.nsf/allkb/D13527D8471D5FC5862576A4006BD081
Sasi.
Certified LabVIEW Associate Developer
If you can DREAM it, You can DO it - Walt Disney

Bypass webcam for usb cam

How do I bypass my webcam(built in) on intel mac, for a usb cam?
Message was edited by: andrewsangst11

Hello,
The link given to you by smecurio_fc on the duplicate post is a very good starting point for your application. Please try to avoid multiple postings on the same topic.
Regards,
Clint M
National Instruments

How to capture an image from my usb camera and display on my front panel

How to capture an image from my usb camera and display on my front panel

Install NI Vision Acquisition Software and NI IMAQ for USB and open an example.
Christian

How to get source code for WinCE 6.0 USB Camera Driver for ARM4I Processor

Hi,
I am implementing USB camera driver for my mini2440 board which has an ARM4I processor. The sample code
"Windows Embedded CE 6.0 USB camera Driver" downloaded from:
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2ef087c0-a4ae-42cc-abd0-c466787c11f2
does not support ARM4I processors. When trying to generate in VS2005 Platform Builder my WinCE 6.0
image for mini2440 with the Third party catalog items "MJPEG Decompression Filter" and "USB CameraDriver",
the linker giver errors. Please advise where to find a working source code for USB (now revision 1.1
("full-speed") is supported in my WinCE 6.0 image) camera for my ARM4I processor. The code should
be in C# but C++ will be fine also.
Thanks,
   Paul

i get this on the hyperterminal when i run the cameradshowapp.exe
Compulab Windows CE NAND X-Loader for CM-T35
Built Dec 20 2009 at 16:48:16
Version 1.01.222
Commit Date 16/12/09
Jumping to bootloader
Microsoft Windows CE Bootloader Common Library Version 1.4 Built Dec 20 2009 16:
46:16
INFO:OALLogSetZones: dpCurSettings.ulZoneMask: 0x200b
Texas Instruments Windows CE EBOOT for CM-T35, Built Dec 20 2009 at 16:48:10
Version 1.01.222
OMAP3430 Version 0x4b7ae02f (Unknown)
TPS659XX Version 0x10 (ES2.x)
-OEMPinMuxSetup....
System ready!
Preparing for download...
INFO: Predownload
+FMD_Init
Checking bootloader blocks are marked as reserved (Num = 6)
+FMD_Init
WARN: Boot config wasn't found, using defaults
+FMD_Init
OALFlashStoreOpen: 4096 blocks, 64 sectors/block
OALFlashStoreOpen: 2048 bytes/sector, 14 reserved blocks
Calling LCD_TurnOn
+FMD_Init
+FMD_Init
BLConfigureFlashPartitions: dwBootPartitionSectorCount = 0x5fff, partition actua
l size =0x4d3a!!!
Hit space to enter configuration menu 5...
Hit space to enter configuration menu 4...
Hit space to enter configuration menu 3...
Hit space to enter configuration menu 2...
Hit space to enter configuration menu 1...
INFO: Boot Device location = 0x8000020
Load NK image from flash memory
+FMD_Init
ROMHDR (pTOC = 0x823b8c28) ---------------------
DLL First           : 0x4001c001
DLL Last            : 0x41c7c0d8
Physical First      : 0x84001000
Physical Last       : 0x863bbdec
Num Modules         :        294
RAM Start           : 0x863c0000
RAM Free            : 0x863d5000
RAM End             : 0x90800000
Num Copy Entries
Copy Entries Offset : 0x85256e38
Prof Symbol Length : 0x00000000
Prof Symbol Offset : 0x00000000
Num Files           :        116
Kernel Flags        : 0x00000002
FileSys RAM Percent : 0x00000020
Driver Glob Start   : 0x00000000
Driver Glob Length : 0x00000000
CPU                 :     0x01c2
MiscFlags           :     0x0002
Extensions          : 0x84002020
Tracking Mem Start : 0x00000000
Tracking Mem Length : 0x00000000
NK Image Loaded
Launch Windows CE image by jumping to 0x80001000...
Windows CE Kernel for ARM (Thumb Enabled) Built on Apr 5 2011 at 17:47:22
+OEMInit
ýSETDATAOUT access is OK....
Forcing clean boot
MainMemoryEndAddress = 0x90800000
-OEMInit
+FMD_Init
Dumping registry defined VK
Row 0: 0x18    0x9     0x25    0x0     0x0     0x0
Row 1: 0x26    0xd     0x28    0x0     0x0     0x0
Row 2: 0x27    0x24    0x23    0x0     0x0     0x0
Row 3: 0x0     0x0     0x0     0x0     0x0     0x0
Row 4: 0x0     0x0     0x0     0x0     0x0
Row 5: 0x0     0x0     0x0     0x0     0x0     0x0
SMSC922x: Core Ethernet Init.
Lan9220 identified. ID_REV = 0x92200000
SMSC922x: MAC address = 00:01:c0:0a:a0:db
Lan9220 identified. ID_REV = 0x92200000
SMSC922x: MAC address = 00:01:c0:09:88:80
SDIO8686: Loading Driver [version = 38.p44]
SDIO8686: Reset with TPS GPIO 2 --> done
!!!Kernel mode PSL 'PRdr' de-registered!!!
!!!Kernel mode PSL 'HRdr' de-registered!!!
!!!Kernel mode PSL 'FRdr' de-registered!!!
EHCI USB Host: HcdPdd_Init+
[OTG] OMAPMHSUSBOTG::Init()+
OMAPMHSUSBOTG::PostInit(): Start.
DSPLINK Module (1.61.04) created on Date: Jun 24 2009 Time: 16:30:52
Display parameters:
        Height = 0x280
        Width = 0x1e0
        HSW = 0x20
        HFP = 0x8
        HBP = 0x17
        VSW = 0x1
        VFP = 0x4
        VBP = 0x3
        DVI is not enabled
        PixelClkDiv = 0x7
        LogClkDiv = 0x1
        ClkSelDSS = 0x5
TD035:: LCDTurnOn
TD035STEE1: Turned display on.
TD035:: Finished LCD VGA init
AUTOLAUNCH: Checking HKEY_LOCAL_MACHINE\Startup key for programs to run.
Can't open HKEY_LOCAL_MACHINE\Startup key.
[WiFi]: Firmware Version: 9.70.3.23
CCaptureFramework: Failed setting up the camera data.
CameraDShowApp: Initializing the camera driver list failed.CameraDShowApp: Retri
eving the driver list failed.CameraDShowApp: Selecting the camera device failed.
CameraDShowApp: Selecting the camera device failed.CameraDShowApp: Selecting the
camera device failed.CameraDShowApp: Selecting the camera device failed.CCaptur
eFramework: Retrieving the still stream config failed.
CameraDShowApp: Initializing the capture graph failed.

Can I use a USB camera to import directly live footage into imovie as opposed to firewire?

Hi!
I use iMovie to directly import live footage from my camcorder.
I've been using old Mini DV cameras to do this but this technology is being outdated with camera manufacturers now all moving to USB.
Can I use a USB camera to take live footage directly into iMovie just the same was as i've been doing with the firewire connection via the old Mini DV camcorders.
Alternatively, are there any firewire camera's that any could reccomend?
Any help or suggestions would be greatly appreciated.
Chris.

No, you cannot import in real time from USB. These USB camcorders will import faster than real time or slower than real time, depending on the speed of your computer.
If you need to import in real time, there are some USB webcams out there that are used mainly for video chats and the like that might work. You may find an HD model.You can also do this with your built in iSight camera.
With a real HD video camcorder, you will need to import it after you shoot.

HT4101 The Lightning to USB Camera Adapter doesn't work

I just bought the Lightning to USB Camera Adapter but it doesn't work and show the message: it is not an authorised accessories..may not work reliabily

the adapter doesnt work with ios 7 on a lot of new devices, so untill apple fixes the issue, here is a workaround http://www.youtube.com/watch?v=pE28JwxQ3Zc

How can I use a USB camera with cRIO 9022. Please see my strange problem.

Hi,
I would like to use a USB camera with NI cRIO 9022. I used the same USB camera with NI USB 6216 DAQ device and developed a VI(within a PROJECT and outside it). So, It is working fine with NI USB 6216 device when I use the Vision Assistant Express VI and gets detected in its Initialization Window. Please see JPEG File 3 where I get NO ERROR.
I am facing a problem when I want to use it with NI cRIO 9022. What exactly I am doing in this case is:
1) Create a NEW PROJECT
2) Add Targets and Devices(NI cRIO 9022)
3) Use the Scan Interface mode
4) Create a NEW VI under the cRIO 9022 device
5) Use a Timed Loop(Synchronized with Scan Engine) for continuous Data Acquisition and Sending from the Analog I/O modules.
6) Use the Vision Assistant available through the NI Vision Acquisition 2010 Module(I get STUCK HERE! The Express VI opens the Initialization Window, but I don't see the USB camera like in JPEG File 3)
I am facing difficulties with this HOST COMPUTER, cRIO implementation differences. On my host computer I have the software packages as shown in JPEG File 1, and on my cRIO 9022 as shown in JPEG File 2.
Can someone guide me how to overcome this and get the USB camera detected when I am using NI cRIO 9022?
NOTE: If this is a problem with software mismatches on HOST and NI cRIO 9022 device, please see JPEG Files 1 and 2 for available software and Host and cRIO 9022.
Thanks.
Amar.
Attachments:
NI Vision Acquisition Express Error for NI cRIO 9022.JPG ‏39 KB
IMAQ and dx Modules Installed on my NI cRIO 9022 hardware(No NI Vision Acquisition 2010 SP1).JPG ‏82 KB
NI Vision Acquisition Express NO Error for NI cRIO 9022.JPG ‏48 KB

Only GigE comms are supported on the cRIO Real Time OS. Have a look at the following:
Machine Vision on NI CompactRIO and Single-Board RIO
Adnan Zafar
Certified LabVIEW Architect
Coleman Technologies

Can I set up multiple usb hard drives- one for time machine and a second for media? Can one also print wirelessly with an old HP C6280 printer?

Can I set up multiple usb hard drives- one for time machine and a second for media?
Can one also print wirelessly with an old HP C6280 printer?

Can I set up multiple usb hard drives- one for time machine and a second for media?
Yes.
Can one also print wirelessly with an old HP C6280 printer?
Possibly by using an Airport Express, but depends on what type of port connection the printer requires.

I have a new iPad Air. Can I use plug in USB camera reader to have a load of movies etc on an external hard drive and then plug and play so to speak. I'm off on holiday and haven't got the capacity to have everything on that I'd like for the kids

Can I use a plug in USB camera reader to have a load of movies etc on an external hard drive and then plug and play so to speak? I'm off on holiday and haven't got the capacity on the iPad to have everything on that I'd like for the kids.
So basically I want a hard drive with X amount of films etc on. Can I then watch them on my iPad?
Hope this makes sense.

External HDD won't work.
You need something like this:
http://www.seagate.com/goflexsatellite/

Multiple USB Camera's

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