Software :: How To View Captured Image From Webcam Using C?
Sep 22, 2010
I want develop an application using webcam.I want to capture the video from webcam and i want to dispay the video.can anybody suggest me how to do that thing using C lanuguage
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May 12, 2010
I always get "no camera found" in camera tab in flash player settings . What can be the problem. My camera is working fine. I have flash player also installed and working absolutely fine.
I tried viewing my camera with "cheese" and i can perfectly see it. But i am unable to see it with Flash player. I visited ustream.tv to see if i can broadcast my video but it always shows "no camera found" in camera tab. How do i resolve this? I even tried solution posted in this thread [URL] :-
LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so firefox &
But still it doesn't work. I also tried gkstreamer-properties and my webcam works just fine in video for linux 2.
I have been trying to solve this since 3 hours. Waiting for your replies
UPDATE :- i am now able to view my webcam using the command given above. But how do i the same for chrome? LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so chrome & doesn't work
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Mar 2, 2009
We have a webcam that is connected to a tv tuner card via the rca input on the tuner card. I want to set that up so that i can view it remotely over the internet. I've seen you can use vlc to do this, but the problem is that I don't want to have the webcam's computer recording and streaming all the time. I want it to only do that when i want to view it from my remote computer. We don't view the camera at a regular time, so a set schedule wouldn't work.
I hope this all makes sense. Is this possible, and if so, what is recommended for getting this done.I'm hoping i can somehow control this with a remote control and we'd see it on our tv monitor (that'd make it easy for the non-computer people here), so if it could be done in a script that would be great cause i can have the remote run the script.
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Jul 16, 2010
I am working on a linux cluster based on Scientific Linux 5. I have some images in .bmp format. How can i view them from the command line or without downloading to desktop? At present I am connecting from Win7 using Exceed.
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Jan 21, 2010
How to get image from webcam by linux c or c++ program? I have a netbook which comes with a webcam, however, how to identify it to be which device file in /dev? Is there any bash command to detect this?
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Jan 26, 2010
i did: init 3 gdm
ok but now I want to go back to kde. How? yast etc. nothing works in 11.2
I tried gnome because blender has no minimize etc. buttons but gnome is the same. how i could view an image while working in Blender?
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Aug 9, 2009
I'm install a genius web cam eye 312 in fedora 11. The image is upside down in all the programs. In amsn there is no colors, and image upside down. In skype, chesse full colors very nice, but image upside down.
amsn give me this information:
v4l2 : usb camera (93a:2622)pac 7311.
The command Lsusb give me
Bus 005 Device 002: ID 093a:2622 Pixart Imaging, Inc.
So I think there is a problem with the driver it self.
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Jul 11, 2011
I have Asus Eee PC T 101 mt. Running SuSE Linux 11.4, KDE version 4.6.0 (Release 6).
The image from integrated webcam is inverted. The image can be upturned to correct orientation by ticking the "Upturned" effect in Webcam (wxCam) application. However, these options are not available in Skype or Google video, or probably in all other services using webcam. Other person in video chat sees my inverted image. Is there a way by which I can correct the situation?
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May 6, 2010
I found drivers for the laptop, both the basic and the webcam. The problem is that image is very dark. On my other OS i don't have this issue. PS: My Laptop is = Asus f5rl
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Jul 11, 2010
I have a Ubuntu Server 10.04 box, which i have a Microsoft LifeCame VX-500 webcam connected via USB.
i think Ubuntu has detected my webcam
Code:
kimse@ajax:/dev$ sudo lsusb
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 045e:074a Microsoft Corp.
[Code]....
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Aug 9, 2010
I'm writing to ask for help with a quality issue when using my webcam on sites like chatroulette, and even testwebcam. My webcam, albeit not a very expensive webcam, is quite decent quality, the box claims that it is 2.0 megapixels but... I'm not too sure. However-- When using this webcam on flash sites, the quality drops - it seems - from 640 x 480 to a measly 160 x 120. I get a very pixelated image from the webcam, but using it in cheese it works perfectly fine, at 640 x 480.
The webcam also works on windows, and the quality is fine on flash sites. But, I wouldn't want the only reason to be using windows to be chatroulette. Here are some screenshots comparing the qualities, the first being a screenshot of the webcam in use on [URL]... and the second being a screenshot of the webcam in use in cheese. I probably look like a bit of an idiot in both of the pictures, apologies for that.
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May 11, 2010
Just purchased a webcam and it worked immediatelly with kopete. This was in the configuration dialog, a small window showed me moving around in all my gloriousness. Now realise why those horror films show this sort of footage.
Thing is: how to make the image bigger, fill the screen? Is there a program? Don't say rtfm, I don't know enough to do that.
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Jul 17, 2010
Using Slackware 13.0. Have a Microdia web cam (60fc) and was (still am) looking for a simple free application to test it. Found a site which identified the drivers, modules, etc. needed so was checking my messages file and noticed that the Image Sensor HV7131R is not always identified as being detected when booting: kernel: usb 1-1.3: HV7131R image sensor detected Is this a problem or what?
I found modules videodev, V4L2, but could not find compat_ioctl32 and it is not listed in the modules loaded. Is this correct? Could not "find" it. I see usbcore listed during booting but does this mean it is a module? or a driver? or what? Also cannot find the an appropriate module that is for either ehci_hcd or uhci_hcd related as both of these appear in the messages. Also I see that the camera is for SN9C105 bridge and know that the "sn9c105" is supposed to be included in "sn9c102" module(?) but the SN9C105 camera notation does not always appear in messages. Is this correct? or (I think) I am confused by the numbering and cases used, i.e. what is a module (loadable?) a bridge and why change cases? Can someone straighten me out? Are all modules loaded listed by lsmod or just the loadable ones and usbcore etc. are "modules" loaded at another time?
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Mar 3, 2011
I am trying to sort image files I've assembled for document production, and I need to be able to see the height and width of the images without having to open them one by one. Is there a way to view an image's physical size in the folder window?
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Feb 13, 2011
whenever I video chat with someone the image from my webcam is clear but the video from the person on the other end is messed up. It is as if it does not render correctly, it's washed out and it looks like a full image and 2 cut off images, one on the bottom and one the top of the full image. Has anyone else encountered this? The PC has a Radeon 9800 Pro AGP card with the ATI drivers installed. Other video plays fine, ....., dvd, avi and mkvs.
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Aug 8, 2011
Is there any software other that zoneminder that will allow me to view/record multiple webcams at once? I have 4 uvc compliant webcams and have not been able to find some software with that type of capability.
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Jun 24, 2010
I'm using the Readhat Linux Enterprise 5, and I encountered a problem about captured keyboard need your help. I log in after entering the required username and password using keyboard, but then the keyboard is captured, i.e., I can not enter anything using keyboard. Meanwhile the mouse works well all the time. I encountered this problem when I pressed some keys wrongly two days ago, but unfortunatelly I can not find out these exact keys I pressed.
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Sep 6, 2010
I setup kdump on sles11sp1, on issuing "echo c > /proc/sysrq-trigger" capture kernel is not booted and kernel dump is not created. Here is my system configuration: Welcome to SUSE Linux Enterprise Server 11 SP1 (x86_64) - Kernel
(l). blade797:~ # uname -a Linux blade797 2.6.32.12-0.7-default #1 SMP 2010-05-20 11:14:20 +0200 x86_64 x86_64 x86_64 GNU/Linux
blade797:~ # cat /proc/cmdline root=/dev/disk/by-id/cciss-3600508b1001030343220202020200018-part2 resume=/dev/disk/by-id/cciss-3600508b1001030343220202020200018-part1 splash=silent crashkernel=256M-:128M vga=0x317 steps followed to enable kdump:
1) yast2 kdump
2) chkconfig boot.kdump on
3) reboot
4) cat /sys/kernel/kexec_crash_loaded
1
5) echo c > /proc/sysrq-trigger
6) system panicked, but dump is not captured.
7) I'm missing /proc/vmcore on Sless11Sp1.
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Jan 20, 2010
i want to use tshark to save captured data i want it to save it in a certain directory and every x seconds and 5 files so every x seconds Tshark saves another 5 files
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Apr 23, 2011
I want to capture a mms stream daily. All works well with that, but I also want to delete any mpg files that are captured from the stream that are more than 7 days old. Will this command work?
Code:
#!/bin/bash
find /mnt/tera/all_video/thai3 -ctime +7 -name "*.mpg" -exec rm -f {} ; -ls > /var/log/thai3.log 2>&1
[code]....
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Oct 18, 2010
I am capturing the same traffic both on client and server. Using Microsoft Network Monitor on client and tcpdump on Linux server.
And when comparing the content of one specific frame captured on two machines, I see it different!
Precisely:
I have SIP communicator on client and opensips on server. Client is doing a REGISTER request to the server. This request contains "Contact:" header, which should contain an IP address of the machine.
When capturend on client, this header contains local private IP address of a machine with SIP communicator (which is 192.168.***). But when captured on server, this header contains the outer address of my provider's router.
I have 2 possible explanations:
1) Some unknown agent acting between my client and server
2) opensips itself is acting at a so low level, that the result of it's frame manipulation is visible by tcpdump.
I am interested if the second option is possible? opensips is a proxy, so does proxy able to manipulate frames directly in the medium?
If so, the is it possible to run tcpdump at a lower level, so that it see packets before opensips processing?
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Jan 21, 2011
Using webcam component of XawTV package as supplied with Ubuntu 10.10. My implementation seems pretty basic, just needs to snap every 5 seconds and ftp to web site. It actually works just fine, but only for an hour or so. Then process continues to run, but image does not update. Kill & restart webcam and it works fine again, until it doesn't. Video stream in XawTV window is fine throughout, so I don't think there's a hardware problem.
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Jan 22, 2010
I have a webcam ( sn9c120 (0x0C45:0x6130) ) which I don't get to work anymore.
Module sn9c102 is loaded.
Plugging in gives me:
usb 3-3: new full speed USB device using ohci_hcd and address 2
usb 3-3: New USB device found, idVendor=0c45, idProduct=6130
usb 3-3: New USB device strings: Mfr=0, Product=1, SerialNumber=0
usb 3-3: Product: USB camera
[Code]....
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Aug 4, 2011
I have an X-Station 25 synth, which has worked fine in the past on Ubuntu. Recently made a fresh install on Xubuntu, and for whatever reason, I'm getting no sound coming out when I just select USB audio.If I go into Sound Preferences, I can see the device. I can even select it for sound input. Hell, if I press some keys on the keyboard, I can see some of the squares on the input level go green.Evidently, there IS sound coming in via the USB connection, and Audacity is capable of recording it.
However, the only way of hearing it is by putting headphones directly into the unit and listening to the monitor output signal. The audio coming in, as detected, is not being played from my laptop speakers/headphones.Am I just missing something here, and that's MEANT to be the only way to hear the audio out?In alsamixer, there are no controls for the Xstation, and nothing seems to be muted. I've upgraded the firmware to the most recent version as well.
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May 30, 2011
I have been working in macromedia dreamviewer for editing html and php files, Just now I moved to linux system by installing xampp , my question is that I need a best html and php editor that supports both the design view and code view as like in dreamviewer.
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Jul 5, 2011
i have sony viao vgn-fz11 Can someone please help ,im new user to ubuntu been trying to get webcam working properly at the moment its upside down and does not work in skype at all just get black screen does this look correct? do i have the right driver?i will try and give as much information as i can.
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Aug 3, 2010
I have a problem making work a webcam. At the begining, after the instalation of 10.04 in a new laptop, the webcam did not work but with a lsusb I see that the webcam was Webcam 5986:0241 acer. I was not able to config neither use the webcam with any application. After lots of test and forums reading I could not do my webcam to work, and now when I do a lsusb my webcam does not appear.
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Aug 14, 2010
how to find out what driver my webcam is using and where its located the webcam it self works but goes from normal to dark after a minute of use and would like to fix it
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Jun 3, 2009
I want to use my laptop's built in webcam as remote webcam and I don't want to use FTP and post images to a www and use php script or sth, I want to make it accessed remotely as a fast stream and if there is a way I would like to use it with Windows XP - Microsfot Windows Messenger.
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Jan 16, 2011
When playing dvd's, vob files and wmv files, the image comes with high contrast colors ,very intense red/green/blue. very dark too. I have vlc 1.1.4 installed, using ubuntu 10.10, libdvdcss2 installed. for the rest of the video formats it seems to work fine. any ideas on what should I start debugging?
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