Ubuntu Multimedia :: How To Configure /dev/Video0 FrameRate
Jul 23, 2010
I downloaded camE and camorama in hope of controling my webcam's framerate for skype because right now it's 24-30 which gives me dark video. But if I lower the frame rate to something like 10, the video magically brightens. camE doesn't do anything..like it turns on my webcam and does some ftp..fails..turns of my webcam ..back to normal. Camorama can't connect to my webcame. Cheese, guvideo are successfully able to conect to my webcam and play around with it.What I want to do is edit my /dev/video0 or some file from where I can fix the framerate for skype.
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Jan 18, 2011
I'm aware that this is a common issue - I've spent "some time" googling. But I think my fault is not the common one. I'm trying to set up my old-ish laptop as a Linux astronomy box. I've installed Ubuntu 10.10 on my FujitsuSiemens AmiloPro V2000.
[Code]...
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Feb 6, 2011
Following this tutorial: [URL] I got everything to work, but the running capture framerate is about half of that set (-r 30). I'm stuck on getting something like 14 fps, which is noticeably choppy. I have a relatively decent system (dual core intel), so I don't think I'm hitting the limitations of the machine (it's only using little over the single core during the process).
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Oct 14, 2010
My webcam is detected under lsusb, but no /dev/video0 shows up. How do I get one?
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Jul 7, 2011
I have a 'Gadget Geek VHS to DVD maker' USB device that takes analogue video in (composite) and plugs into the computer via USB.
Here is the output of lsuss (it's the eMPIA one):
Code:
Now this is essentially as far as I get, DBUS just says the following when I plug it in:
Code:
What I want to be able to do is open the (theoretical) output stream it produces in vlc and record it from there. Then I run into my next issue. There is no video* folder or link or file in my /dev directory and I can't stream video directly from the appropriate 'special file' inside /dev/bus/usb/00*/00*
My machine is ubuntu 10.4 64-bit
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Jun 1, 2010
Although my webcam is identified. I cant get my webcam to work. gstreamer-properties complains - Video for Linux 2 (v4l2): Cannot identify device '/dev/video0' when testing. I have installed packages suggested by sticky.
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Jan 25, 2010
I have a TV Card and a webcam connected to my computer. I've noticed that after a restart the TV Card capture device is /dev/video1 (while other times it's /dev/video0). When the device changes I have to update my tvtime.xml, which is a hassle.How can I force the capture device to be /dev/video0 and the webcam to /dev/video1?
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Feb 3, 2010
Seemingly at random when I reboot my PC which I do every now and then, when I get it back up and running it will sometimes have switched my video card from using /dev/video1 to /dev/video0 or vice versa. It's not a huge deal but it is slightly annoying and I would like to understand why it does it and how I can stop it from flip flopping.
Not sure what you need to know in order to answer but I use 9.10, gnome 2.28.1, the video card is a Hauppauge 150 PVR something.
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Dec 31, 2010
Running Lucid - was an LTS upgrade from 8.04.
I have a usb webcam (off brand). When installed, /dev/video0 is properly created and I can access the webcam through cheese as a regular user.
Code:
crw-rw----+ 1 root video 81, 0 2010-12-31 16:00 /dev/video0
The regular user is already a member of the video group, and I have checked all permissions under System->Admin->User/Groups->Advanced.
However, when as this regular user, I go to a website that tries to access my webcam via flash (ie, chatroulette or omegle), it does not detect the cam. (Firefox 3.6.13 with Flash 10)
I've already set the LD_PRELOAD as suggested elsewhere.
HOWEVER, if I LD_PRELOAD and run Firefox as root, all works fine and the flash plugin sees the webcam.
[Code]....
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Oct 3, 2010
I have 3 old video capture cards which I would like to use for CCTV. Each card supports 1 camera. So I would like to have 3 cameras setup in the end and monitor them with zoneminder. When each card is plugged in on it's own, it works fine. Video comes through clearly with xawtv and zoneminder. However as soon as I plug in a 2nd card (with or without a camera connected) the output in xawtv and zoneminder goes haywire. It looks like the 2nd card takes over the first card, resulting in majority of the picture coming from the 2nd card, and some (if any) from the 1st card. When viewing either of the two cards /dev/video0 or /dev/video1 in xawtv the output is identical. I've tried this on a fresh 10.04 Ubuntu install, and on an older MythTV debian computer, the same results. Here are lspci -vv outputs with 2 combinations of cards (same fuzzy output):
[URL]
My thoughts are because the capture cards are cheap (similar to winmodems), the problem may be in the software kernel modules not allowing room for other similar capture cards to run at the same time. Can anyone suggest me in the right direction? Do I need to setup some sort of memory allocation for each card manually? Something in the BIOS? An extra option when the card modules are loaded?
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Jan 29, 2011
I am trying to get my system up and running with motion (motion detection software).
After a reboot I have the video device /dev/video0
But then when I start the daemon
Code:
sudo /etc/init.d/motion start
is says [ OK ]
but now the devide /dev/video0 is no longer there and motion won't start up.
Code:
Failed to open video device /dev/video0: No such file or directory
The only way to get the video0 device back is rebooting.
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Jul 17, 2010
I have an Acer Laptop with a built-in Crystal Eye webcamwhich works (tested it with luvcview).The camera is represented by /dev/video0.I would like to read data from this device, but i don't manage to do it.
This code Code: #include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
[code]....
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Aug 7, 2010
Mencoder has not a support for my webcam.
However "
Quote:
" works flawlessly well.
So option dumpfile in man page is there to help us!
But well the command
Quote:
results in a 0kylobytes files.
How to force mplayer to dump file -tv flow data to file?
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Aug 23, 2010
Last week my uncle gave me a Logitech webcam (According to lsusb: Logitech, Inc. QuickCam Ultra Vision). It works fine in my 32 bit Debian install but in my 64 bit install, nothing works with it. Heres the issues I get:
Skype: Simply will not use it but can detect it
Cheese: Segmentation faults immediately
eViacam: Can't detect it
VLC: Detects it and can use it but almost everything is completely gray
v4lucp: Gets several errors relating to things like color, brightness, contrast, etc
I have just about everything related to v4l and v4l2 installed, including 32 bit libraries. Why is this webcam so "defective" in 64 bit if its actually listed as /dev/video0?
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May 19, 2011
I'm new to ubuntu and I decided to try Sonata, but I can't configure MPD. Sonata uses localhost by default but it's already used by Apache. I tried disabling Apache but it still doesn't work. What IP should I use to be able to use Apache and Sonata in the same time ?
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Jan 9, 2010
I've been at this for the last hour. I just put a Hauppage WinTV-TVR-1800 into my machine, rebooted and installed MythTV. I set up the card, the video source and the input as well as configured a few random channels. I click WATCH TV in the menu, it goes to a screen saying, "Please Wait....", then it brings me back to the menu. There's no error, is there some sort of log file.
Here it is run in the terminal:
Code:
deemar@Chugger:~$ mythfrontend
2010-01-09 20:03:05.636 mythfrontend version: branches/release-0-22-fixes [22594] www.mythtv.org
2010-01-09 20:03:05.663 AudioPulseUtil: Suspend Success
2010-01-09 20:03:05.665 Using runtime prefix = /usr
2010-01-09 20:03:05.665 Using configuration directory = /home/deemar/.mythtv
2010-01-09 20:03:06.445 Empty LocalHostName.
[Code]...
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Apr 1, 2010
I recently decided to upgrade my old desktop instead of buying a new one. I figured I would go ahead and max out the specs on the motherboard while I was at it. I had a standard AGP slot and the best graphics card I could find for AGP was the Radeon HD 4650 (AGP 1GB GDDR2). So I ordered the parts and went on my merry way.I installed the card and did a fresh install of 9.10, hoping to max perform my "new" system. The card was acting kinda fishy on the live boot and I had to reboot a few times before it magically worked. I got installed etc and when I booted it worked, but it turned out performance was painful. When using Firefox the delay when scrolling down the screen was literally unbearable. No problem right, I used the restricted drivers app to go ahead and install the ATI drivers hoping that it would auto-magically fix things.
System booted but once I logged in the screen would just fill with freezing and garbage so it was impossible to get anything done. I experimented with all three options but this is what ended up being my solution. Download your ATI driver using this site: AMD Graphics Drivers & Software Just select Linux in the OS Select column.
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Jan 10, 2011
I use Kubuntu 10.10 and I'd like to know what to configure (say in daemon.conf - PulseAudio) to get the best sound quality & the most out of my sound card. By the way, I don't have any sound problems. I just want to get the best results from the built-in speakers & when I connect my laptop to external speakers. I have a Sony VAIO VGN-NR32M laptop.
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May 10, 2011
I have just upgraded to 11.04 and the sound on my skype isn't working...configure my pulseaudio settings.whenever i try opening pulseaudio volume control, it says "Connection failed: Connection refused"
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Jan 2, 2010
I am not getting very good sound from skype. I wondered if Ekiga was better than skype so I have:
Installed it.
Obtained a sip address.
adjusted the ports on my router as below
set up the user by way of the configuration assistant.
And still I see nothing and hear nil. I am not getting an error message. When I run the test address it immediately reports it is done. I set up the H232 account.
Each of the following port ranges were translated to the same ranges:
TCP 1720-1720
UDP 5000-5100
TCP 30000-30000
What have I left out of the configuration?
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Dec 24, 2010
I have INTEX TV tuner card. i'm trying to configure in ubuntu for tvtime. The card has the saa7130 or saa7134 philipse chipset.
lspci | grep -i saa713
output:
Code:
00:0a.0 Multimedia controller: Philips Semiconductors SAA7130 Video Broadcast Decoder (rev 01)
after the installation, the card was detected and /dev/video0 was created but dmesg indicated that the card is not among the ones listed as supported and since card did not have EEPROM, the card was not up and running right away.i have edited /etc/modprobe.d/tvcard.conf and added options saa7134 card=3 tuner=14
Code:
$sudo nano /etc/modprobe.d/tvcard.conf
added:
Code:
options saa7134 card=3 tuner=14
Then CTRL+X to exit
still it did not work. tvtime would always say no signal and tvtime-scanner never picked up any channels. then i followed instruction given by rsramkee [URL]. edited saa7134-cards.c and deployed new kernel linux-2.6.36.2 with changes.i rebooted machine to windows selected one channel in tv tuner software of windows, again rebooted machine to ubuntu (i have dual boot windows XP and ubuntu 2.6.35.23). tvtime able display video of channel that is selected in windows OS (No sound), but not be able to tune any other stations.In mplayer able display video of channel that is selected in windows OS with sound.
command:
Code:
mplayer tv:// -tv driver=v4l2:chanlist=us-cable:alsa:adevice=hw.0,1:amode=1:audiorate=48000:forceaudio:volume=100:immediatemode=0:norm=PAL
i followed instruction given by http://linuxtv.org/wiki/index.php/Saa7134-alsa to set up sound. loading the loopback module with the command:
$ pactl load-module module-loopback
Now tvtime able display video of channel that is selected in windows OS with sound, but not be able to tune any other stations. Not be able to tune any stations.dmesg output:
Code:
[ 1320.568603] saa7130/34: v4l2 driver version 0.2.16 loaded
[ 1320.568697] saa7130[0]: found at 0000:00:0a.0, rev: 1, irq: 18, latency: 32, mmio: 0xdffff800
[ 1320.568737] saa7130[0]: subsystem: 1131:0000, board: LifeView FlyVIDEO3000 [card=2,insmod option]
[code]...
i'm not be able to tune any stations using tvtime and xawtv. if channel is not selected in windows OS for more then 1 hour then tvtime displays message no signal, same message in tvtime-scaner (No sound).
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Jan 5, 2011
After installation of the new hardware I activated the ATI closed source driver. There is an issue with the screens
1st screen, via DVI: I cannot change to the native screen resolution
2nd screen, via VGA: The background of any window is not drawn.
Means: I can see lots of parts of other windows after moving or closing them.
Therefore I was searching for an alternative and found the hint to uninstall the ATI driver and use the open source one. After uninstall and reboot (requested by a parallel system update), some boot messages I have no screen output anymore. Means: two black screens. These are going into sleep mode after a few seconds. How can I get a running system again? Optimal would be, that I have full support for both screens. Same happens in failsave mode.
System environment:
Ubuntu 10.04
AMD Athlon 64 X2 3800+, 4G RAM, motherboard ALiveNF6G-DVI (internal graphic deactivated), ATI Radeon HD 5450
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May 8, 2011
I am using the following:
ubuntu 10.04 LTS
firefox 3.6.17
totem 2.30.2
As it stands, if I play an mp3 file via the web, firefox will launch totem which will in turn launch goom.
Looks nice, but I would like to turn off the Visualisation which takes up the entire CPU. I try under firefox preferences, Edit->Preferences->Plugins, there isn't anything there I can change.
I try under firefox Utils->Plugins and there isn't anything there I can change.I try using gconf-editor, there are different settings there I can play with like: Under /apps/totem/visual it has the setting "GOOM: what a GOOM!", I try and delete it, it doesn't change anything.
Still with gconf-editor I try changing /apps/totem/plugins/screensaver turning the setting of "active" to uncheck. No change, goom still comes up with the fantastic graphics I just don't want. Still with gconf-editor I try changing /system/gstreamer/0.10/default/visualization from "goom" to blank. Again, no change.
If I look under the process list while totem is running goom I see the following: /usr/lib/totem/totem-plugin-viewer --plugin-type cone --user-agent Mozilla/5.0 (X11; U; Linux x86_64; fr; rv:1.9.2.17) Gecko/20110422 Ubuntu/10.04 (lucid) Firefox/3.6.17 --referrer http://blah blah blah blah.mp3 --mimetype audio/mpeg
There doesn't seem to be anywhere I can change the command line which is being passed to totem to make it behave differently and turn off the goom visualizations. I have tried starting up totem as a stand alone application, there I go into Edit->Preferences->Display and make sure the choice for "Show visual effects when an audio file is played" is unticked. That gives me the results I am after for totem as a stand alone application, which is no Visualizations whem audio file is being played BUT It makes no change for totem running as a plugin in firefox.
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Nov 21, 2010
I have been trying to install Squeeze from the 6.0.1a KDE CD-1 plus the Debian repos. I just cannot get X to work. I get similar bad results to those mentioned by other users having similar problems, but none of the suggested fixes works.
Basic hardware information:
Desktop PC, whole 40 GB disk used for install
Graphics card: none Video controller on motherboard: VIA Technologies S3 UniChrome VGA controller (about 8 years old)
Monitor: Samsung Syncmaster 1280 x 1024 (about 8 years old)
Some things I've already tried: in rescue mode, as root, in /etc/X11X -configuremove file to /etc/X11/xorg.conf basically everything mentioned in threads in past two months regarding users who cannot get X to work reinstalling 100x with every choice for the installer I can think of
What happens: when doing the install, contrary to expectation, I am never prompted for any of the hardware information which the documentation at debian.org says I should have on hand (is that a good sign or a bad sign?)
No matter how I try to do the install,I always seem to get a nongraphical installation, so I try this: as root:apt-get install xorg in /etc/X11X -configthen move generated file (which looks like X didn't try to create an actual configuration file) to /etc/X11/xorg.config as non-root user:startx I get black screen (or a tiny tiny konsole at upper left) and system hangs
How can I tell whether this an X misconfiguration? How can I fix it? How can I tell whether I simply need a driver? Where do I look? How can I tell whether my hardware is simply incompatible with Squeeze? What do I need to replace? Do I need to get a new monitor in order to use Squeeze? Do I need to buy a new motherboard with newer video controller? Do I need to buy a graphics card? Which?
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Jan 9, 2010
I have Ubuntu installed, using transmission client to download a torrent.The torrent is coming down at ~300kbps, but my internet connection speedtests @ 50mbps...how do I configure connection to utilize connection?
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Jan 13, 2010
I've just downloaded gtk-recordmydesktop and when I press record a split second later this message comes up: Recording is finished recordmydesktop has exited with status: 768 Description: Could not open/configure sound card. if I need to download anything extra from the repos or something I have to do in system settings.
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Jan 18, 2010
I've been trying to configure this generic remote that came with a TV tuner card (saa7134) a while ago but I haven't been able to do so. The thing is that the remote works, in fact some buttons are recognized properly... but some are not. I'm not using lirc!, from I have been reading there is support for generic remotes in the 2.6.31 kernel, besides, i can't configure lirc, it doesn't let me load the kernel modules to start up the daemon for the ir. is there a config file for the button mapping of the native remote support in kernel 2.6.31?. Been searching it but couldn't find it.
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Aug 31, 2010
After 5+ years of using Ubuntu, I am switching to it as my desktop. On my old FreeBSD desktop i was running KDE3; now I am runnung 10.04.1 and find that even tho things are more friendly with KDE4, one of the tools I use most,kttsmgr, no longer works like it did on my previous desktop.
How can I configure kttsmgr to use festival (right now it says "espeak") and to present the dialogue that prints the strings beneath what is being read? --Note that I downloaded flite and eflite for testing purposes. Both fail. not a peep. I do have audio with songs and can listen to streams, but nothing from ktts*
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Apr 9, 2010
I have a Toshiba laptop with a Intel X3100 graphics card and I'm using a second LCD display with it ( it works ok as an extension to my notebook's display ) My question: is it possible to configure the system so that one virtual desktop is my laptop lcd and another the external lcd ? Mine has a native resolution of 1280x800 and the external one 1280x1024 and I'm running Ubuntu 9.10
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Mar 12, 2011
I'm trying to configure my display on Ubuntu, but I'm getting problems to define the screen resolution. The native resolution for FX2490HD is 1920x1080, but Ubuntu only recognizes 1360x768. Following a recipe[1] that uses xrandr I can setup 1920x1080, but the image looks strange. In this mode, I see shadows behind the blurred letters. This is the code that I typed to follow the recipe:
[Code]...
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