http://forums.quickcamteam.net/ Mon, 06 Oct 2008 17:45:59 -0700 MyBB http://forums.quickcamteam.net/showthread.php?tid=501 Mon, 06 Oct 2008 17:44:09 -0700 http://forums.quickcamteam.net/showthread.php?tid=501
First, it is great to find a site like this one. Finding answers to detailed technical questions of this nature is rare, and much appreciated.

I am considering building a small project which would require being able to control the Logitech QuickCam Pro 9000 from software. In an ideal world I would be able to set the aperture/shutter speed, choose a resolution, perhaps set the type of compression and color correction in the camera, and then trigger an image capture. FThis image would be transferred via USB to my software so I can then manipulate it at will.

I have not made a choice of software yet - I would be open to anything although VB.NET would be easiest on my end.

Is this possible, and if so would you be able to give me a couple of pointers on how to achieve this?

Best regards,

Tom.]]>
First, it is great to find a site like this one. Finding answers to detailed technical questions of this nature is rare, and much appreciated.

I am considering building a small project which would require being able to control the Logitech QuickCam Pro 9000 from software. In an ideal world I would be able to set the aperture/shutter speed, choose a resolution, perhaps set the type of compression and color correction in the camera, and then trigger an image capture. FThis image would be transferred via USB to my software so I can then manipulate it at will.

I have not made a choice of software yet - I would be open to anything although VB.NET would be easiest on my end.

Is this possible, and if so would you be able to give me a couple of pointers on how to achieve this?

Best regards,

Tom.]]> http://forums.quickcamteam.net/showthread.php?tid=500 Mon, 06 Oct 2008 09:45:32 -0700 http://forums.quickcamteam.net/showthread.php?tid=500
Under the resolution the highest resolution tab I see is only 640x480???? The quickcam fusion supported up to 720x576 and its almost 3 years old?

]]>
Under the resolution the highest resolution tab I see is only 640x480???? The quickcam fusion supported up to 720x576 and its almost 3 years old?

]]> http://forums.quickcamteam.net/showthread.php?tid=499 Fri, 03 Oct 2008 20:52:54 -0700 http://forums.quickcamteam.net/showthread.php?tid=499
How can I turn the illumination LED on and off on this Quickcam Deluxe for Notebooks web cam. The usb id is 046d:08d8.

I am looking at the source code for the Ubuntu Linux device driver and I don't see any variable for turning on the webcam illumination LED.

Is there any other driver code or web documentation that shows controlling the LED as an example?

(The driver code says this is the same camera as the 046d:08a9 Logitech Notebook Deluxe.)

Let me echo how I got this far other readers:

I have had good success getting a Quickcam Deluxe for Notebooks (usb id 046d:08d8 ) working on two different Ubuntu systems.

I manually installed the driver with the following commands:

sudo apt-get install v4l

The web contains older pages that instruct the user to download and compile a driver. As of September 2008 Ubuntu has the compiled driver in a package.

It took a system restart with the webcam plugged in for the driver and other programs to all load and work.

I think gspca driver is in a driver package that is required by v4l as a dependency. That means, when you install v4l, a package of drivers are installed. One of those drivers works with this webcam.

The drivers that are being loaded, as shown in tail /var/log/messages are:

ubuntu/media/gspcav1/gspca_core.c: USB SPCA5XX camera found.(ZC3XX)
usbcore: registered new interface driver gspca
ubuntu/media/gspcav1/gspca_core.c: gspca driver 01.00.12 registered
usbcore: registered new interface driver snd-usb-audio

The gspca driver is available in source code as:
sudo apt-get install gspca-source

The source code file has to be unxipped::
sudo bunzip2 gspca-source.tar.bz2
sudo tar -xf gspca-source.tar

Then the main c code for the webcam drivers are in:
/usr/src/modules/gspca/gspca_core.c

This file is C language source code. This code has lots of comments that explain what is going on.]]>
How can I turn the illumination LED on and off on this Quickcam Deluxe for Notebooks web cam. The usb id is 046d:08d8.

I am looking at the source code for the Ubuntu Linux device driver and I don't see any variable for turning on the webcam illumination LED.

Is there any other driver code or web documentation that shows controlling the LED as an example?

(The driver code says this is the same camera as the 046d:08a9 Logitech Notebook Deluxe.)

Let me echo how I got this far other readers:

I have had good success getting a Quickcam Deluxe for Notebooks (usb id 046d:08d8 ) working on two different Ubuntu systems.

I manually installed the driver with the following commands:

sudo apt-get install v4l

The web contains older pages that instruct the user to download and compile a driver. As of September 2008 Ubuntu has the compiled driver in a package.

It took a system restart with the webcam plugged in for the driver and other programs to all load and work.

I think gspca driver is in a driver package that is required by v4l as a dependency. That means, when you install v4l, a package of drivers are installed. One of those drivers works with this webcam.

The drivers that are being loaded, as shown in tail /var/log/messages are:

ubuntu/media/gspcav1/gspca_core.c: USB SPCA5XX camera found.(ZC3XX)
usbcore: registered new interface driver gspca
ubuntu/media/gspcav1/gspca_core.c: gspca driver 01.00.12 registered
usbcore: registered new interface driver snd-usb-audio

The gspca driver is available in source code as:
sudo apt-get install gspca-source

The source code file has to be unxipped::
sudo bunzip2 gspca-source.tar.bz2
sudo tar -xf gspca-source.tar

Then the main c code for the webcam drivers are in:
/usr/src/modules/gspca/gspca_core.c

This file is C language source code. This code has lots of comments that explain what is going on.]]> http://forums.quickcamteam.net/showthread.php?tid=498 Fri, 03 Oct 2008 05:46:11 -0700 http://forums.quickcamteam.net/showthread.php?tid=498
Can anyone help me in configuring Logitech Quickcam Ultra Vision on Ubuntu 6.06?

Right now the camera light is OFF and it just gets detected on the USB port (using lsusb) :

Code:
Bus 004 Device 002: ID 046d:08c9 Logitech, Inc.
Bus 004 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000


I have installed luvc and when i run luvcview, it shows:

Code:
luvcview version 0.2.1
Video driver: x11
A window manager is available
video /dev/video0
ERROR opening V4L interface
: No such file or directory


If somebody can walk me through installing and configuring this webcam, i would really appreciate! I have already spent a fortune on this device.

Please help!
[/code]]]>
Can anyone help me in configuring Logitech Quickcam Ultra Vision on Ubuntu 6.06?

Right now the camera light is OFF and it just gets detected on the USB port (using lsusb) :

Code:
Bus 004 Device 002: ID 046d:08c9 Logitech, Inc.
Bus 004 Device 001: ID 0000:0000
Bus 002 Device 001: ID 0000:0000
Bus 003 Device 001: ID 0000:0000
Bus 001 Device 001: ID 0000:0000


I have installed luvc and when i run luvcview, it shows:

Code:
luvcview version 0.2.1
Video driver: x11
A window manager is available
video /dev/video0
ERROR opening V4L interface
: No such file or directory


If somebody can walk me through installing and configuring this webcam, i would really appreciate! I have already spent a fortune on this device.

Please help!
[/code]]]> http://forums.quickcamteam.net/showthread.php?tid=495 Thu, 02 Oct 2008 10:38:27 -0700 http://forums.quickcamteam.net/showthread.php?tid=495
I have logitech quickcam communicate delux (046d:0992) and it is working nicely in red hat linux. I just wanted to know that after taking a picture from the webcam how do i check the status of its leds so that i know how many leds were on and how many were off?? A step by step code will be appreciated

Thanks
Unnati]]>
I have logitech quickcam communicate delux (046d:0992) and it is working nicely in red hat linux. I just wanted to know that after taking a picture from the webcam how do i check the status of its leds so that i know how many leds were on and how many were off?? A step by step code will be appreciated

Thanks
Unnati]]> http://forums.quickcamteam.net/showthread.php?tid=494 Wed, 01 Oct 2008 12:39:25 -0700 http://forums.quickcamteam.net/showthread.php?tid=494
KatchiWachi sent me here in this thread...

[url=http://forums.logitech.com/logitech/board/message?board.id=quickcam_software&thread.id=49636][/url]


I just got one of these in for testing and really love it. However we need to use these in an information kiosk at trade shows and use our own propriety software created with VB6 to communicate with the camera. In the past we used a Quick Pro 3000 and were able to do it. Would this be possible with the Orbital AF? Does this make sense? I wasn't around when they did this last time and have little to no experiencs with this but it was shoved on my desk Would appreciate any help our guidance.


Thanks!


MJ]]>
KatchiWachi sent me here in this thread...

[url=http://forums.logitech.com/logitech/board/message?board.id=quickcam_software&thread.id=49636][/url]


I just got one of these in for testing and really love it. However we need to use these in an information kiosk at trade shows and use our own propriety software created with VB6 to communicate with the camera. In the past we used a Quick Pro 3000 and were able to do it. Would this be possible with the Orbital AF? Does this make sense? I wasn't around when they did this last time and have little to no experiencs with this but it was shoved on my desk Would appreciate any help our guidance.


Thanks!


MJ]]> http://forums.quickcamteam.net/showthread.php?tid=492 Wed, 01 Oct 2008 05:00:47 -0700 http://forums.quickcamteam.net/showthread.php?tid=492 http://forums.quickcamteam.net/showthread.php?tid=490 Tue, 30 Sep 2008 13:08:42 -0700 http://forums.quickcamteam.net/showthread.php?tid=490
The following comment could indicate a way forward but I don't know enough to follow it up:


Quote:Image has blue taint with default gain levels. Has anybody got better colors using GRed,GBlue and GGreen parameters? https://wiki.ubuntu.com/HardwareSupportC...asLogitech


It is possible the problem is not with the camera itself but with the overlay display of Ubuntu (Compiz involved?). If this turns out to be the case, maybe all that can be hoped for is a warning or a disclaimer.

Support info for claim about overlay: a screenshot of Ekiga showed the image whereas a screenshot of Skype showed a black screen where the (yellowish) image was displaying.]]>
The following comment could indicate a way forward but I don't know enough to follow it up:


Quote:Image has blue taint with default gain levels. Has anybody got better colors using GRed,GBlue and GGreen parameters? https://wiki.ubuntu.com/HardwareSupportC...asLogitech


It is possible the problem is not with the camera itself but with the overlay display of Ubuntu (Compiz involved?). If this turns out to be the case, maybe all that can be hoped for is a warning or a disclaimer.

Support info for claim about overlay: a screenshot of Ekiga showed the image whereas a screenshot of Skype showed a black screen where the (yellowish) image was displaying.]]> http://forums.quickcamteam.net/showthread.php?tid=489 Mon, 29 Sep 2008 08:18:34 -0700 http://forums.quickcamteam.net/showthread.php?tid=489
The camera is recognized, and the uvc driver is loaded for it. And I can get a picture in luvcview. But the picture looks terrible. I hunted down a windows system to try the camera on and it works fine there---looks great. So it's definitely a software/driver problem and not a hardware problem.

Here is a typical example image taken under normal indoor illumination. (The camera does much better than this with the lights off and shades drawn under windows, so lighting is not the issue.)

[attachment=102]

I have looked around for settings that might be relevant, but haven't found anything.

Any advice?]]>
The camera is recognized, and the uvc driver is loaded for it. And I can get a picture in luvcview. But the picture looks terrible. I hunted down a windows system to try the camera on and it works fine there---looks great. So it's definitely a software/driver problem and not a hardware problem.

Here is a typical example image taken under normal indoor illumination. (The camera does much better than this with the lights off and shades drawn under windows, so lighting is not the issue.)

[attachment=102]

I have looked around for settings that might be relevant, but haven't found anything.

Any advice?]]> http://forums.quickcamteam.net/showthread.php?tid=487 Sun, 28 Sep 2008 06:20:10 -0700 http://forums.quickcamteam.net/showthread.php?tid=487
This is a request for Martin. Would it be possible to add information on shutter type for each camera on the list of UVC cameras or have that information elsewhere. Especially which camers have global shutter. It seems that many people on this forum use Logitech cams for machine vision applications and this information would be useful. I saw it somewhere that 4000 Pro model has global shutter. Any others?

Thanks.]]>
This is a request for Martin. Would it be possible to add information on shutter type for each camera on the list of UVC cameras or have that information elsewhere. Especially which camers have global shutter. It seems that many people on this forum use Logitech cams for machine vision applications and this information would be useful. I saw it somewhere that 4000 Pro model has global shutter. Any others?

Thanks.]]> http://forums.quickcamteam.net/showthread.php?tid=485 Thu, 25 Sep 2008 23:35:51 -0700 http://forums.quickcamteam.net/showthread.php?tid=485
is there a source filter that gives access to a QuickCam Communicate STX webcam in applications like GraphEdit, i.e. interactively rather than in a programmatic way (i.e. the DirectShow API)?

Cheers,
Frank]]>
is there a source filter that gives access to a QuickCam Communicate STX webcam in applications like GraphEdit, i.e. interactively rather than in a programmatic way (i.e. the DirectShow API)?

Cheers,
Frank]]> http://forums.quickcamteam.net/showthread.php?tid=484 Thu, 25 Sep 2008 18:59:10 -0700 http://forums.quickcamteam.net/showthread.php?tid=484 http://forums.quickcamteam.net/showthread.php?tid=483 Thu, 25 Sep 2008 13:53:06 -0700 http://forums.quickcamteam.net/showthread.php?tid=483 i'm using ubuntu, maybe i will switch to slackware, i dont know if there is difference
(i apologize for my english,i know it's not good)]]> i'm using ubuntu, maybe i will switch to slackware, i dont know if there is difference
(i apologize for my english,i know it's not good)]]> http://forums.quickcamteam.net/showthread.php?tid=482 Thu, 25 Sep 2008 10:43:31 -0700 http://forums.quickcamteam.net/showthread.php?tid=482
I´m trying to understand how my Logitech Pro 9000 works.
When I put the resolution in Amcap at default 1600*1200, amcap set the framerate automatically as 5/s. But why and which component choose this value? What happen if we be able too choose a higher framerate (maybe be by reducing the exposure time too and supposing a high light environment )? Is it the same for the raw mode? (I can´t test it myself because the raw mode still doesn´t work with my webcam)
Of course I get a jerked video rendering.

What´s about the "set frame rate" function in AmCap? The frame rate still remain 25. Is it just a "call frame" function, which takes what it got?
If so there should be no effect if I set in the video capture filter at 320x240 with 30 frame/s and then set in capture->set frame rate as 50/s.
As expect the video renderer is jerked when I put the frame rate as 5/s.
But why doesn´t it work with 2/s? Some fixed default value in the driver?

Flo]]>
I´m trying to understand how my Logitech Pro 9000 works.
When I put the resolution in Amcap at default 1600*1200, amcap set the framerate automatically as 5/s. But why and which component choose this value? What happen if we be able too choose a higher framerate (maybe be by reducing the exposure time too and supposing a high light environment )? Is it the same for the raw mode? (I can´t test it myself because the raw mode still doesn´t work with my webcam)
Of course I get a jerked video rendering.

What´s about the "set frame rate" function in AmCap? The frame rate still remain 25. Is it just a "call frame" function, which takes what it got?
If so there should be no effect if I set in the video capture filter at 320x240 with 30 frame/s and then set in capture->set frame rate as 50/s.
As expect the video renderer is jerked when I put the frame rate as 5/s.
But why doesn´t it work with 2/s? Some fixed default value in the driver?

Flo]]> http://forums.quickcamteam.net/showthread.php?tid=481 Thu, 25 Sep 2008 08:02:14 -0700 http://forums.quickcamteam.net/showthread.php?tid=481
Now if I lower the resolution it takes a snapshot instantly and displays it on screen.

Any ideas what I can try to get round this as it seems fine on another PC.

cheers
Paul]]>
Now if I lower the resolution it takes a snapshot instantly and displays it on screen.

Any ideas what I can try to get round this as it seems fine on another PC.

cheers
Paul]]> http://forums.quickcamteam.net/showthread.php?tid=480 Thu, 25 Sep 2008 02:38:19 -0700 http://forums.quickcamteam.net/showthread.php?tid=480
I´m using a Logitech Webcam Pro 9000. I´m working at an application (in c++ with Directshow), which shows me a window with the video renderer an another window as an histogram. The histogram gives me the intensity value of a pixel in function of his horizontal position. The user should be able to choose a horizontal pixelline from the video renderer and get instantly the histogram from that line.
I don´t know exactly how I will implement it.

But as I remembered the advantage of cmos sensor, one is, that one can choose a partial zone on the sensor to work with. This is not possible on the ccd sensor like on the Quickcam Pro 3000 to 5000. By ccd you have to take the full sensor information and filter out what you don´t need with data work.
So, is it a way to get from my cmos webcam only the pixelline which I choose, whithout filter out the pixels which I don´t need? I think this way I would economize a lot of ressource because I don´t have to handle the full amount of sensor data.

Tell me there is a way! Please ;D

Flo]]>
I´m using a Logitech Webcam Pro 9000. I´m working at an application (in c++ with Directshow), which shows me a window with the video renderer an another window as an histogram. The histogram gives me the intensity value of a pixel in function of his horizontal position. The user should be able to choose a horizontal pixelline from the video renderer and get instantly the histogram from that line.
I don´t know exactly how I will implement it.

But as I remembered the advantage of cmos sensor, one is, that one can choose a partial zone on the sensor to work with. This is not possible on the ccd sensor like on the Quickcam Pro 3000 to 5000. By ccd you have to take the full sensor information and filter out what you don´t need with data work.
So, is it a way to get from my cmos webcam only the pixelline which I choose, whithout filter out the pixels which I don´t need? I think this way I would economize a lot of ressource because I don´t have to handle the full amount of sensor data.

Tell me there is a way! Please ;D

Flo]]> http://forums.quickcamteam.net/showthread.php?tid=479 Thu, 25 Sep 2008 01:24:59 -0700 http://forums.quickcamteam.net/showthread.php?tid=479 I'm currently writing an application and now I would like to control my webcam with it.
But this is a stand alone application, so I would not have libwebcam installed.

How can I control PT(Z) directely from my application ?]]> I'm currently writing an application and now I would like to control my webcam with it.
But this is a stand alone application, so I would not have libwebcam installed.

How can I control PT(Z) directely from my application ?]]> http://forums.quickcamteam.net/showthread.php?tid=478 Thu, 25 Sep 2008 00:18:47 -0700 http://forums.quickcamteam.net/showthread.php?tid=478
I have small question about FPS performance I get with my camera.

My camera is build-in USB laptop camera from Chicony electronics:
> Bus 001 Device 002: ID 04f2:b018 Chicony Electronics Co., Ltd

Uvcvideo (same as specification) claims it should support 25fps.
Here is what I get after loading uvcvideo with trace=15 parameter:
uvcvideo: Found format YUV 4:2:2 (YUYV).
uvcvideo: - 640x480 (25.0 fps)
uvcvideo: - 352x288 (25.0 fps)
uvcvideo: - 320x240 (25.0 fps)
uvcvideo: - 176x144 (25.0 fps)
uvcvideo: - 160x120 (25.0 fps)
uvcvideo: - 800x600 (20.0 fps)
uvcvideo: - 1280x960 (6.6 fps)
uvcvideo: - 1600x1200 (5.0 fps)
All log can be found here: http://pastebin.com/f1aeb0d4f


What is strange sometimes with luvcview im getting 6 FPS, sometimes 12 FPS.
Could anyone please help me with that problem ? I would like to obtain as much FPS as possible.

Ah I would forgot.
Im using luvcview from SVN, version 0.2.1

Thank you in advance,
Pablo]]>
I have small question about FPS performance I get with my camera.

My camera is build-in USB laptop camera from Chicony electronics:
> Bus 001 Device 002: ID 04f2:b018 Chicony Electronics Co., Ltd

Uvcvideo (same as specification) claims it should support 25fps.
Here is what I get after loading uvcvideo with trace=15 parameter:
uvcvideo: Found format YUV 4:2:2 (YUYV).
uvcvideo: - 640x480 (25.0 fps)
uvcvideo: - 352x288 (25.0 fps)
uvcvideo: - 320x240 (25.0 fps)
uvcvideo: - 176x144 (25.0 fps)
uvcvideo: - 160x120 (25.0 fps)
uvcvideo: - 800x600 (20.0 fps)
uvcvideo: - 1280x960 (6.6 fps)
uvcvideo: - 1600x1200 (5.0 fps)
All log can be found here: http://pastebin.com/f1aeb0d4f


What is strange sometimes with luvcview im getting 6 FPS, sometimes 12 FPS.
Could anyone please help me with that problem ? I would like to obtain as much FPS as possible.

Ah I would forgot.
Im using luvcview from SVN, version 0.2.1

Thank you in advance,
Pablo]]> http://forums.quickcamteam.net/showthread.php?tid=477 Wed, 24 Sep 2008 09:52:05 -0700 http://forums.quickcamteam.net/showthread.php?tid=477
The problem I'm having with ffmpeg is that it reduces my resolution to 176x144, regardless of what I specify. I suspect that it's not using the camera's mjpeg mode. Here is the command I issue:

ffmpeg -f video4linux2 -vcodec mjpeg -s 640x480 -r 15 -i /dev/video0 -vcodec copy out.mjpeg

I'm able to capture images with uvccapture, so I think support is there at the v4l2 level. Maybe I'm missing a command or maybe this isn't supported with ffmpeg. That begs the question. Is there a simpler way to dump the mjpeg stream from the camera?

I've included the full ffmpeg input and output below for reference. Thanks.

-Randall



root@gumstix-custom-verdex:~$ ffmpeg -f video4linux2 -vcodec mjpeg -s 640x480 -r 15 -i /dev/video0 -vcodec copy out.mjpeg
FFmpeg version SVN-r15392, Copyright © 2000-2008 Fabrice Bellard, et al.
configuration: --enable-cross-compile --cc=/home/randall/gumstix/gumstix-oe/tmp/cross/bin/arm-angstrom-linux-gnueabi-gcc --arch=arm --enable-nonfree --disable-stripping --disable-armvfp --disable-armv6
libavutil 49.10. 0 / 49.10. 0
libavcodec 52. 0. 0 / 52. 0. 0
libavformat 52.22. 1 / 52.22. 1
libavdevice 52. 1. 0 / 52. 1. 0
built on Sep 23 2008 13:05:31, gcc: 4.1.2
[video4linux2 @ 0x7c3320][3]Capabilities: 4000001
[video4linux2 @ 0x7c3320]The V4L2 driver changed the video from 640x480 to 176x144
Input #0, video4linux2, from '/dev/video0':
Duration: N/A, start: 1222277483.530381, bitrate: 6082 kb/s
Stream #0.0: Video: mjpeg, yuyv422, 176x144, 6082 kb/s, 15.00 tb®
File 'out.mjpeg' already exists. Overwrite ? [y/N] y
Output #0, mjpeg, to 'out.mjpeg':
Stream #0.0: Video: mjpeg, yuyv422, 176x144, q=2-31, 6082 kb/s, 15.00 tb©
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
frame= 12 fps= 2 q=-1.0 Lsize= 594kB time=0.82 bitrate=5904.0kbits/s]]>
The problem I'm having with ffmpeg is that it reduces my resolution to 176x144, regardless of what I specify. I suspect that it's not using the camera's mjpeg mode. Here is the command I issue:

ffmpeg -f video4linux2 -vcodec mjpeg -s 640x480 -r 15 -i /dev/video0 -vcodec copy out.mjpeg

I'm able to capture images with uvccapture, so I think support is there at the v4l2 level. Maybe I'm missing a command or maybe this isn't supported with ffmpeg. That begs the question. Is there a simpler way to dump the mjpeg stream from the camera?

I've included the full ffmpeg input and output below for reference. Thanks.

-Randall



root@gumstix-custom-verdex:~$ ffmpeg -f video4linux2 -vcodec mjpeg -s 640x480 -r 15 -i /dev/video0 -vcodec copy out.mjpeg
FFmpeg version SVN-r15392, Copyright © 2000-2008 Fabrice Bellard, et al.
configuration: --enable-cross-compile --cc=/home/randall/gumstix/gumstix-oe/tmp/cross/bin/arm-angstrom-linux-gnueabi-gcc --arch=arm --enable-nonfree --disable-stripping --disable-armvfp --disable-armv6
libavutil 49.10. 0 / 49.10. 0
libavcodec 52. 0. 0 / 52. 0. 0
libavformat 52.22. 1 / 52.22. 1
libavdevice 52. 1. 0 / 52. 1. 0
built on Sep 23 2008 13:05:31, gcc: 4.1.2
[video4linux2 @ 0x7c3320][3]Capabilities: 4000001
[video4linux2 @ 0x7c3320]The V4L2 driver changed the video from 640x480 to 176x144
Input #0, video4linux2, from '/dev/video0':
Duration: N/A, start: 1222277483.530381, bitrate: 6082 kb/s
Stream #0.0: Video: mjpeg, yuyv422, 176x144, 6082 kb/s, 15.00 tb®
File 'out.mjpeg' already exists. Overwrite ? [y/N] y
Output #0, mjpeg, to 'out.mjpeg':
Stream #0.0: Video: mjpeg, yuyv422, 176x144, q=2-31, 6082 kb/s, 15.00 tb©
Stream mapping:
Stream #0.0 -> #0.0
Press [q] to stop encoding
frame= 12 fps= 2 q=-1.0 Lsize= 594kB time=0.82 bitrate=5904.0kbits/s]]> http://forums.quickcamteam.net/showthread.php?tid=476 Wed, 24 Sep 2008 07:58:40 -0700 http://forums.quickcamteam.net/showthread.php?tid=476 I420 (12bits) @ 355x288 @ 30fps = 35.1Mbit/s

Using Advanced USB Port Monitor 2.3 it detects a constant 7Mbit/s irrespective of resolution or frame rate (double-checked and compared with other USB devices). Is the camera always sending its native resolution (355x288) which is then being downscaled (160x120) or upscaled (640x480) on the computer?

How is it possible that 35.1Mbit/s can be sent via USB 1.1, yet alone through a constant 7Mbit/s?]]> I420 (12bits) @ 355x288 @ 30fps = 35.1Mbit/s

Using Advanced USB Port Monitor 2.3 it detects a constant 7Mbit/s irrespective of resolution or frame rate (double-checked and compared with other USB devices). Is the camera always sending its native resolution (355x288) which is then being downscaled (160x120) or upscaled (640x480) on the computer?

How is it possible that 35.1Mbit/s can be sent via USB 1.1, yet alone through a constant 7Mbit/s?]]>