How to take snapshots of two usb camera at the same time

Similar Questions

• MAX cannot find two usb cameras at the same time

  Hello

  I want to use two cameras usb (Thorlabs DCC 1545 M) in NOR-IMAQdx in Labview, but it cannot find a single camera (the one plugged earlier), and also a single camera is shown in MAX. Both cameras working in the manufacturer's software, and if I unplug the 1 unit, the 2nd will be displayed in MAX after a refresh.

  I found that one camera is supported for each USB hub in Labview, and all USB ports in this computer correspond to a same hub online. I don't know if this is causing the problem.

  In fact, I need to take the picture in both cameras at the same time, a switch programmed between the two cameras will work for me.

  Any suggestion and comment will be appreciated.

  Hello Hosni,

  According to this link, you can acquire from multiple USB cameras simultaneously.  The limitation is on the manufacturer and how they interface with the bus of DirectShow.  When you use two cameras of the same make and model, it sometimes happens that not enough information is not IMAQdx to distinguish between the two cameras.  When you switch to MAX cameras, they come as different cameras, or they appear actually virtually the same?

  Since you said switching between them might work, I found an example that does just that.  Just make sure you give a name to each camera single camera.  I hope this will be useful for you.

  In addition, there is a bit of discussion on this topic on the forum of discussion already.  Check out these related threads, or use the search box to search for more.  There is much 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/...

• How can I use Adobe and a camera at the same time?

  I am a musician and I put to read sheet music and record with the camera to the IPad. But whenever I left the window of the camera and switch to Adobe agani, the camera stop recording.

  I can't save IM reading the notes of music at Adobe.

  I use Air from the IPad.

  Nobody helps me?

  Thank you.

  Hi Edusax,

  It seems to be the limitation of the device because it doesn't have the split screen function to use two applications at the same time.

  You will need two devices else you can print the PDF to read sheet music.

  Kind regards

  Nicos

• How can I work with two icloud ID on the same pc?

  How can I work with two icloud ID on the same pc?

  Define "work".

  What exactly do you want to accomplish?

  You can use the iCloud Panel to connect to iCloud account and use a browser to go to icloud.com and sign in with another account.

• iPhone 6 s - photo app does not allow users to take pictures and listen to music at the same time

  The repro steps:

  • iPhone 6 s - photo app does not allow the user to take pictures and listen to music at the same time

    Music app vs photo app

  (1) play a sound track in the music app
  (2) the swtich to app photo (on the "Photo" mode)
  (3) music stops

  Pandora app vs photo app

  1) turn on pandora
  2) switch to the camera on the 6s iphone app
  (3) stopping the music

  PLEASE FIX AS SOON AS POSSIBLE *.

  My iPhone stopped playing music when you take photos?

  Nothing to trouble since he was not taken in charge.

• Could a NI6008 be shared by two software programs at the same time?

  Hello

  I wrote two software with Labwindows/CVI for different purposes. Two of them are using NI6008. I have only one ni6008 attached to my laptop. I can run two programs at the same time? I mean, it's a NI6008 could be controlled by two different software at the same time? Thank you!

  Best,

  Shang

  Shang,

  There are four types of tasks, AO, DIO and counter. You can have one of each performer both on a USB-6008.

  Kind regards

  Kyle Mozdzyn

  Engineering applications

  National Instruments

• Trigger two FPGA instances at the same time

  I have a basic FPGA code that transmits the bits of data on a serial (RS-485) bus, the code is written so that it expects in the first State of a machine to States in a single-cycle timed loop.  After a certain trigger, he begins to read a FIFO containing data and sends the data on a line of Tx.  It does this until all bits are send and then it goes back to the first State to wait for the next trigger.  The relaxation is necessary because windows must fill out first before the FPGA FIFO can start sending.

  I need two instances of this code runs, because I have two buses of com (one is redundant).  So I use the FPGA code as a Subvi and I wrote a main FPGA vi to call two separate instances of the Subvi in parallel.  A regular window vi wrote on the FIFO for bed FIFO for Rx and Tx.  No problems so far.

  The thing is I start two transmissions in 200nS of each other (Yes, nanoseconds).  Windows will write two FIFO in parallel, but the timing is 4uS apart, too long.  I tried implementing a Boolean flag in the Subvi FPGA, but windows can not write directly on the control of Subvi.  FPGA won't allow (the Write function is grayed out).  I tried to use a FIFO for a flag, but the problem is a race condition.  One of the instances is first read FIFO and he destroy.  The other can't read.  I need a common trigger point to be used by the two instances of Subvi.

  My final solution was to use a memory in the Subvi FPGA and digital control in the main FPGA vi.  Windows write in numerical order, it may because the control is in the main FPGA vi.  Inside the main FPGA, I run a timed loop that looks for digital to be zero.  If so, it writes the value into the location of the memory used by the Subvi FPGA.  After awhile, the principal wrote a zero back to memory to prevent the Subvi is restarted, as well as to write a zero for digital to reset.  This repeats, waiting for windows to write in digital again for the next transmission.

  I had to do it this way because sometimes I want to pass on the bus, and sometimes just one or the other.  Numeric values are used to determine which to pass on.  Now, the transmissions are starting to almost exactly at the same time, 1 or 2 nanoseconds apart.  But the trigger process seems very silly to me.  I was wondering if there is a better solution.  I'm pretty new to FPGA.

  tbob wrote:

  Basically, I did the same thing using FPGA memory.  Windows I am writing for a digital control that resides inside the main FPGA vi.  In the main FPGA, I write in the memory.  Inside the Subvi FPGA, I read the brief and decode the value to use either one or the other or both buses.  After fool with it for awhile, because reading Memeory needs to use a shift register (probably because it takes a whole cycle of clock), I had to work.  The two bus trigger at the same time.  I guess it's not really important if I use a FIFO or if I use the memory.  The main problem is that I write Windows at the hand of FPGA, then the hand of FPGA for the Subvi FPGA.  Then the time is right for what is the Subvi is.

  There are some advantages to the use of two FIFO on your approach.  First of all, you don't have the change of register for the memory location.  Secondly, we should not worry that VI is responsible for compensation to the memory location, or do, you run the risk that one of your subVIs run twice, or not at all, if the memory is not erased at the right time.  Perhaps most important, you'll save yourself space on the FPGA because you will not need arbitration - the additional code that is added when two parts of the FPGA try to access the same resource at the same time.  In your case, both instances of the Subvi access the memory block at the same time, so the FPGA compiler adds additional logic to avoid conflict.  If only read you the memory block in one place and just write it in one place (reading and writing can be different loops where subVIs) there is no need for arbitration.  Using two FIFOs, you can keep independent and avoid the conflict resolution code.  See the help for the "arbitration" for more details.

• I recently bought a computer build-yourself. My question is what is the best way to mirror or save files on the two hard disks at the same time?

  Hello community,

  I recently bought a computer build-yourself.
  My question is what is the best way to mirror or save files on the two hard disks at the same time?
  I know there is a way in diskmgmt.msc, but I can't seem to make it work.
  Spec:
  Windows 7 Professional 64 bit
  8 GB ram ddr3
  2 x 1 TB hard drive

  On Saturday, 22 September 2012 00:53:18 + 0000, kevin.coe wrote:

  As I said, I think it's not only not a good idea, I think it's a very

  a poor man. Backup should be stored outside the computer content. Or
  use a service like Carbonite Online backup.

  Ken Blake, Microsoft MVP

  What is raid? A large number of people I know use raids.

  RAID 1 (mirroring) is not a backup solution. RAID 1 uses two or
  Several readers, each one duplicate of the other, to provide redundancy,
  no backup. It is used in situations (almost always inside)
  companies, not in homes) where any city cannot be tolerated.
  because the way it works is that if a disk fails the other takes
  more seamlessly.

  Although some people thing of RAID 1 as a backup technique, it is
  what it is, because it is subject to a simultaneous loss of the
  original and many of the main dangers facing the mirror
  your data - serious power, close to the lightning seeds, virus
  attacks, stolen computer, etc. Most companies that use RAID 1
  also have a solid plan of external backup in place.

  "Why the RAID is (usually) a Terrible idea".
  http://www.pugetsystems.com/articles?&ID=29
  Ken Blake, Microsoft MVP

• Insertion of records in two different tables at the same time?

  Hello everyone, I have question about inserting records in two different tables at the same time, I'm looking for is by the way a unique id, which is created in the first statement insert to the second insert statement. Example of this problem:

  < cfquery name = "addRecords1" datasource = 'test' >

  Insert Into Table1 (name, Date, age)

  Values (< cfqueryparam cfsqltype = "cf_sql_char" value = "#arguments.) "Name # ' >.

  < cfqueryparam cfsqltype = 'cf_sql_date' value = '#arguments. "Date # ' >.

  < cfqueryparam cfsqltype = "cf_sql_int" value = "#arguments. Age #"(>); "

  Select SCOPE_IDENTITY() as RecID;

  < / cfquery >

  < cfquery name = "addRecords2" datasource = 'test' >

  Insert into Table2(Company,City,Date,ID)

  Values (< cfqueryparam cfsqltype = "cf_sql_char" value = "#arguments.Company #" >,)

  < cfqueryparam cfsqltype = "cf_sql_char" value = "" #City # ">,"

  < cfqueryparam cfsqltype = 'cf_sql_date' value = "" #Date # ">,"

  ( < cfqueryparam cfsqltype = "cf_sql_int" value = "How to pass RecID to insert in this table?" >).

  < / cfquery >

  In this example, I'm inserting records in table 1 and creation of IDENTITY SCOPE as RecId. I would like to pass this id and insert it in my table 2. This Id, I'll use in my second table as an identifier. If anyone knows anything about this please let me know. Thank you.

  );
  

  QueryName - DOT - ColumnName, so it should be:

  );
  

  HTH,

  ^_^

• What should I upgrade to be able to change the 10 cameras at the same time?

  I'm doing a video for live events and I must be able to modify the 10 cameras at a time.

  My system I've set up 2 years ago has a 3.4 ghz Ivy bridge i7, 32 GB of ram and a 2 GB video card. When I do multi camera changes in adobe first, I can only do 3 or 4 at a time with fluidity, using the camera multi monitor, but when I try 5 or more, it does not really play. The audio plays fine, but the video is just a frame every second couple.

  I tried mounting on an internal hard drive WD black, which is 7 200 rpm, but I found that I get the same results on a WD my book edition (which is a hard drive WD Green running to 5 400 rpm) via USB 3.0.

  What should I upgrade to be able to play all 10 cameras at the same time? A high-end video card? Which one? Do I need an esata raid configuration? Is what I ask to do even possible or not first even stand that?

  Thank you!

  My specs:

  central processing unit

  http://www.Newegg.com/product/product.aspx?item=N82E16819116501

  motherboard

  http://www.Newegg.com/product/product.aspx?item=N82E16813131830

  Video card

  http://www.Newegg.com/product/product.aspx?item=N82E16814127608

  RAM (32 gb total)

  http://www.Newegg.com/product/product.aspx?item=N82E16820233246

  Case

  http://www.Newegg.com/product/product.aspx?item=N82E16811119245

  What version of first? The GPU acceleration is activated? You may need to apply a 'hack' at first, so that it actually uses the GTX 560 for the Mercury engine.

  Runs in 'Software only' mode, navigate to C:\Program Files\Adobe\Adobe Premiere Pro and search the text file called "cuda_supported_cards.txt".

  Rename or delete this file - without this list of cards "approved," to look at first will use ANY card that meets the minimum criteria.

  I do not use the Multicam feature myself, but as an experiment, I piled about 20 layers of AVCHD, using multiple PIPS on the entire screen, and he plays them back well. The GPU acceleration will help no doubt if that is not currently enabled

  Thank you

  Jeff Pulera

  Safe Harbor computers

• appearing in two different colors at the same time container attached screenshot.

  Hello

  I am very impressed with this site's Look, you can see that
  in this the container showed up in two different colors at the same time as shown in the attached screenshot.

  Please tell me how to get there?

  A part is loading advertising and other view their business rules.

  Please tell me how to get this behavior

  Because when I use the Application container = 'black' background color, it displays the container integer oiail color.

  Help, please

  Thanks in advance.

  There are many ways to achieve this. We can be to use the background image for the application. Other means may be to use various containers (Panel, canvas etc with background pictures) to get this look. Think of it in HTML view. How you can use the div tags to your page layout, you can use various containers of Flex to your page layout.

• How many users can connect to Apple TV at the same time?

  How many users can connect to Apple TV at the same time?

  Your question is a little vague, what do you mean by "users that connect to AppleTV?

• Is it possible to have two mice connected at the same time?

  Hello. I have a gamer mouse, and I am pretty tired of changing the battery every now and then. So I was wondering if I could connect a wired mouse, I could use on the desktop, while my current mouse is always connected - for when I want to do some gaming. Windows Vista will allow that I have two mice connected at the same time?

  Hello

  You can connect two mice of universal Bus controller to the computer, but it goes to show that a single pointer.

• before I unpack my 7520 one.how while many pages will be it scan at the same time

  before I unpack my 7520 one.how while many pages will be it scan at the same time

  Maybe a maximum of 50 sheets of paper are loaded in the ADF feeder at the same time.

• possible to have 2 different application fields for two different clips at the same time

  Hello

  possible to have 2 different application fields for two different clips at the same time for the classification match in terms of the scope, only not to the eye?

  Not that I know of.  And Yes, it would be very useful. As would the ability to go back 2 in reading monitor and a button "game clip under the read head 1. Sigh.

  Neil