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Camilo S. | 4 Sep 2010 16:35
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CVD::V4LBuffer<yuv422> Logitech web 9000 cam control help

Hi people,my name is Camilo im student of Systems Engineering at Universidad
Catolica de Colombia  http://mi.eng.cam.ac.uk/~er258/cvd/ , im currently
working on a project based on PTAM http://www.robots.ox.ac.uk/~gk/PTAM/, im
tryng to have control of my cam but i can not do it, there is the following
code to control video source using v4l2 like this (the project use this
libraries in here for computer vision http://mi.eng.cam.ac.uk/~er258/cvd/)

// Copyright 2008 Isis Innovation Limited
#include "VideoSource.h"
#include <cvd/Linux/v4lbuffer.h>
#include <cvd/colourspace_convert.h>
#include <cvd/colourspaces.h>
#include <gvars3/instances.h>

namespace PTAMM {

using namespace CVD;
using namespace std;
using namespace GVars3;

VideoSource::VideoSource()
{
  cout << "  VideoSource_Linux: Opening video source..." << endl;
  string QuickCamFile = GV3::get<string>("VideoSource.V4LDevice",
"/dev/video0");
  ImageRef irSize = GV3::get<ImageRef>("VideoSource.Resolution",
ImageRef(1600,1200));
  int nFrameRate = GV3::get<int>("VideoSource.Framerate", 30);
  V4LBuffer<yuv422>* pvb = new V4LBuffer<yuv422>(QuickCamFile, irSize, -1,
false, nFrameRate);
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Avner | 5 Sep 2010 01:42
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Failure to operate video card: Hauppauge WinTV-HVR 1850 on Linux kernel 2.6.27-17-generic (Ubuntu Intrepid distribution)


Hello,

I am trying to install a Hauppauge 1850 video card into Linux Home
automation system (LinuxMCE) which is based on Ubuntu Intrepid (I can't
upgrade the kernel since this is what the LinuxMCE distribution supports)

I am feeding analog signal to the video card, either through a coax analog
connection or an RCA analog connection. I cannot see any picture from the
card (I verified that the video card is working properly under a Windows
Vista OS)

I am trying to use the video card using a lightweight application such as
tvtime, xawtv. In all applications I am failing to see an image. (For
example, tvtime shows the message "No inputs avialble Cannot open capture
device /dev/video0". Right clicking on Input configuration / Change video
source doesn't give any options)

I installed the drivers for the card, according to the instructions in:

http://www.linuxtv.org/wiki/index.php/Hauppauge_WinTV-HVR-1800

Building the drivers from source, according to the section "Making it Work /
Analog" fails with error.

cd v4l-dvb

make

I'm getting the following compilation error:
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Jorge Cabrera | 9 Sep 2010 09:37

Video capture device

Hello,

I wanted to set up a videoconference service at my company using a sony 
video camera with a usb video capture device and linux (Ubuntu to be 
specific). The videoconference system we're using is through webex and 
megameeting. I am currently using an Avermedia video capture device but 
the problem I had was that for this device the default input was "Tuner" 
and even dough I could set the default input to S-Video with v4l 
utilities this would only work with mplayer, vlc... but it wouldn't work 
with flash or java in a browser which are the technology behind most of 
online videoconference services. So after a month of banging my head 
against the wall I gave up and installed another operating system. 
Windows. Yes, I know.

But now I want to give it another try so this time I was thinking of 
trying with another video capture usb device so I wanted to ask the 
members of this list if you ever made one of this devices work perfectly 
under linux, specially with flash or java technologies. I think I would 
have the same problems with any Avermedia device so maybe there's 
something out there that works.

Thanks for your help,

Have a nice day

--

-- 
Jorge Cabrera
Ándago Ingeniería - www.andago.com

Teléfono: +34 916 011 373
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Roger Oberholtzer | 9 Sep 2010 11:12
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Re: Video capture device

On Thu, 2010-09-09 at 09:37 +0200, Jorge Cabrera wrote: 
> Hello,
> 
> I wanted to set up a videoconference service at my company using a sony 
> video camera with a usb video capture device and linux (Ubuntu to be 
> specific). The videoconference system we're using is through webex and 
> megameeting. I am currently using an Avermedia video capture device but 
> the problem I had was that for this device the default input was "Tuner" 
> and even dough I could set the default input to S-Video with v4l 
> utilities this would only work with mplayer, vlc... but it wouldn't work 
> with flash or java in a browser which are the technology behind most of 
> online videoconference services. So after a month of banging my head 
> against the wall I gave up and installed another operating system. 
> Windows. Yes, I know.
> 
> But now I want to give it another try so this time I was thinking of 
> trying with another video capture usb device so I wanted to ask the 
> members of this list if you ever made one of this devices work perfectly 
> under linux, specially with flash or java technologies. I think I would 
> have the same problems with any Avermedia device so maybe there's 
> something out there that works.

I am using a Logitec USB webcam and it works with flash. I have noted
that it does not work with all versions of flash. So I have a specific
version that I do not reinstall and then it continues to work. This is
on openSUSE. But I suspect it is the same for all Linux distos as they
cannot change the flash parts.

There is an application called cheese that is great for testing these
devices. If it works there, then you can be sure the OS is doing the
(Continue reading)

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Jorge Cabrera | 10 Sep 2010 13:30

Re: Video capture device

Roger Oberholtzer wrote:
> On Thu, 2010-09-09 at 09:37 +0200, Jorge Cabrera wrote: 
>   
>> Hello,
>>
>> I wanted to set up a videoconference service at my company using a sony 
>> video camera with a usb video capture device and linux (Ubuntu to be 
>> specific). The videoconference system we're using is through webex and 
>> megameeting. I am currently using an Avermedia video capture device but 
>> the problem I had was that for this device the default input was "Tuner" 
>> and even dough I could set the default input to S-Video with v4l 
>> utilities this would only work with mplayer, vlc... but it wouldn't work 
>> with flash or java in a browser which are the technology behind most of 
>> online videoconference services. So after a month of banging my head 
>> against the wall I gave up and installed another operating system. 
>> Windows. Yes, I know.
>>
>> But now I want to give it another try so this time I was thinking of 
>> trying with another video capture usb device so I wanted to ask the 
>> members of this list if you ever made one of this devices work perfectly 
>> under linux, specially with flash or java technologies. I think I would 
>> have the same problems with any Avermedia device so maybe there's 
>> something out there that works.
>>     
>
> I am using a Logitec USB webcam and it works with flash. I have noted
> that it does not work with all versions of flash. So I have a specific
> version that I do not reinstall and then it continues to work. This is
> on openSUSE. But I suspect it is the same for all Linux distos as they
> cannot change the flash parts.
(Continue reading)

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Roger Oberholtzer | 10 Sep 2010 13:45
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Re: Video capture device

On Fri, 2010-09-10 at 13:30 +0200, Jorge Cabrera wrote:

> Thanks for your reply and your advice Roger. Problem is that using a
> webcam is not an option right now because the solution that we have to
> provide is by using a usb video capture device connected to a camera.
> Have anyone tried one of those with linux?

You mean that you have something like a Dazzle video capture device
connected to the USB and a camera attached to that? What usb capture
device are you using? Many are supported. But not all of them.

--

-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST

Ramböll Sverige AB
Krukmakargatan 21
P.O. Box 17009
SE-104 62 Stockholm, Sweden

Office: Int +46 10-615 60 20
Mobile: Int +46 70-815 1696

--
video4linux-list mailing list
Unsubscribe mailto:video4linux-list-request <at> redhat.com?subject=unsubscribe
https://www.redhat.com/mailman/listinfo/video4linux-list
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Jorge Cabrera | 10 Sep 2010 13:56

Re: Video capture device

Roger Oberholtzer wrote:
> On Fri, 2010-09-10 at 13:30 +0200, Jorge Cabrera wrote:
>
>   
>> Thanks for your reply and your advice Roger. Problem is that using a
>> webcam is not an option right now because the solution that we have to
>> provide is by using a usb video capture device connected to a camera.
>> Have anyone tried one of those with linux?
>>     
>
> You mean that you have something like a Dazzle video capture device
> connected to the USB and a camera attached to that? What usb capture
> device are you using? Many are supported. But not all of them.
>
>
>   
Yes exactly, I'm using Avermedia EZMaker USB Gold 
(http://tienda.avermedia.es/product.aspx?productid=81126). The device 
have linux drivers and it seem to work ok but I'm having the problems I 
mentioned before.

--

-- 
Jorge Cabrera
Ándago Ingeniería - www.andago.com

Teléfono: +34 916 011 373
Móvil: +34 637 741 034
e-mail: jorge.cabrera <at> andago.com

C/Alcalde Ángel Arroyo n.º10 1.ªPl. (28904) Getafe, Madrid
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Roger Oberholtzer | 10 Sep 2010 14:04
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Re: Video capture device

On Fri, 2010-09-10 at 13:56 +0200, Jorge Cabrera wrote:
> Roger Oberholtzer wrote: 
> > On Fri, 2010-09-10 at 13:30 +0200, Jorge Cabrera wrote:
> > 
> >   
> > > Thanks for your reply and your advice Roger. Problem is that using a
> > > webcam is not an option right now because the solution that we have to
> > > provide is by using a usb video capture device connected to a camera.
> > > Have anyone tried one of those with linux?
> > >     
> > 
> > You mean that you have something like a Dazzle video capture device
> > connected to the USB and a camera attached to that? What usb capture
> > device are you using? Many are supported. But not all of them.
> > 
> > 
> >   
> Yes exactly, I'm using Avermedia EZMaker USB Gold
> (http://tienda.avermedia.es/product.aspx?productid=81126). The device
> have linux drivers and it seem to work ok but I'm having the problems
> I mentioned before.

I use v4lctl to configure devices. The configurations stay until the
devices are repowered. Have you tried this?

--

-- 
Roger Oberholtzer

OPQ Systems / Ramböll RST
(Continue reading)

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Jorge Cabrera | 10 Sep 2010 14:50

Re: Video capture device

Roger Oberholtzer wrote:
> On Fri, 2010-09-10 at 13:56 +0200, Jorge Cabrera wrote:
>   
>> Roger Oberholtzer wrote: 
>>     
>>> On Fri, 2010-09-10 at 13:30 +0200, Jorge Cabrera wrote:
>>>
>>>   
>>>       
>>>> Thanks for your reply and your advice Roger. Problem is that using a
>>>> webcam is not an option right now because the solution that we have to
>>>> provide is by using a usb video capture device connected to a camera.
>>>> Have anyone tried one of those with linux?
>>>>     
>>>>         
>>> You mean that you have something like a Dazzle video capture device
>>> connected to the USB and a camera attached to that? What usb capture
>>> device are you using? Many are supported. But not all of them.
>>>
>>>
>>>   
>>>       
>> Yes exactly, I'm using Avermedia EZMaker USB Gold
>> (http://tienda.avermedia.es/product.aspx?productid=81126). The device
>> have linux drivers and it seem to work ok but I'm having the problems
>> I mentioned before.
>>     
>
> I use v4lctl to configure devices. The configurations stay until the
> devices are repowered. Have you tried this?
(Continue reading)

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Roger Oberholtzer | 10 Sep 2010 15:07
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Re: Video capture device

On Fri, 2010-09-10 at 14:50 +0200, Jorge Cabrera wrote:
> Roger Oberholtzer wrote: 
> > On Fri, 2010-09-10 at 13:56 +0200, Jorge Cabrera wrote:
> >   
> > > Roger Oberholtzer wrote: 
> > >     
> > > > On Fri, 2010-09-10 at 13:30 +0200, Jorge Cabrera wrote:
> > > > 
> > > >   
> > > >       
> > > > > Thanks for your reply and your advice Roger. Problem is that using a
> > > > > webcam is not an option right now because the solution that we have to
> > > > > provide is by using a usb video capture device connected to a camera.
> > > > > Have anyone tried one of those with linux?
> > > > >     
> > > > >         
> > > > You mean that you have something like a Dazzle video capture device
> > > > connected to the USB and a camera attached to that? What usb capture
> > > > device are you using? Many are supported. But not all of them.
> > > > 
> > > > 
> > > >   
> > > >       
> > > Yes exactly, I'm using Avermedia EZMaker USB Gold
> > > (http://tienda.avermedia.es/product.aspx?productid=81126). The device
> > > have linux drivers and it seem to work ok but I'm having the problems
> > > I mentioned before.
> > >     
> > 
> > I use v4lctl to configure devices. The configurations stay until the
(Continue reading)

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