Hi,
Have you tried any other software besides cheese? (guvcview, luvcview,...)
Regards,
Paulo
2011/11/23 Antonio Roberts :
> I recently bought this wireless webcam;
> http://www.maplin.co.uk/2.4ghz-wireless-webcam-388087 . I'm having
> trouble getting it to work on Ubuntu 11.04.
>
> I ran lsusb a
Hi,
I have my logitech sphere up and running with a 64 bit 3.0 kernel.
All controls are working including pan/tilt/ and focus.
In ubuntu at least you can't cold plug the camera, or uvcdynctrl won't
get triggered.
The easiest way is just to rmmod and then modprobe uvcvideo, this will
get everything
e or video capture for the default action of the camera
button)
regards,
Paulo
2011/10/22 Max Lapshin :
> On Sat, Oct 15, 2011 at 3:09 AM, Paulo Assis wrote:
>> Hi,
>> have you tried it on guvcview ?
>> You should be able to use that button to capture a image or video
>> depen
Hi,
have you tried it on guvcview ?
You should be able to use that button to capture a image or video
depending on the default action you select.
Regards,
Paulo
2011/10/14 Max Lapshin :
> Hi. Is it possible to capture button press on microsoft lifecam studio?
>
> There is small button on top of c
Hi all,
Just dropping a line to inform you that guvcview has moved to sourceforge:
project page: http://sourceforge.net/p/guvcview/home/Home/
home page: guvcview.sourceforge.net
This change was prompted by the closing of berlios on 31-12-2011, the
lack of funding has forced them to shut-down thei
amera too..
>
> Regards,
> Ajay Bhargav
>
> - "Paulo Assis" wrote:
>
>> Hi,
>> see attached a patched capture example, for saving the driver output
>> buffer into raw files (200).
>> I haven't been able to test build it, but the changes a
t; On Fri, Sep 9, 2011 at 10:50 AM, Paulo Assis wrote:
>>
>> Hi,
>> see attached a patched capture example, for saving the driver output
>> buffer into raw files (200).
>> I haven't been able to test build it, but the changes are minimal so
>> it should work.
ards,
>
> --
> Rob Krakora
> MessageNet Systems
> 101 East Carmel Dr. Suite 105
> Carmel, IN 46032
> (317)566-1677 Ext 212
> (317)663-0808 Fax
>
> On Fri, Sep 9, 2011 at 10:05 AM, Paulo Assis wrote:
>>
>> Well one important thing to notice is the pixel for
or me for the FaceVsion
> Touchcam E1.
>
> Best Regards,
>
> Rob Krakora
>
> On Fri, Sep 9, 2011 at 9:18 AM, Ajay Bhargav
> wrote:
>>
>> Hi Paulo,
>>
>> for me ffdec_h264 worked perfectly... I used current stable release of
>> gstreamer-ffmpeg. It
s to be some SVC variant of h264 and ffmpeg can't play it correctly.
> Robert say, currently only fluh264dec (flyendo plugin for gstreamer) can
> play it.
>
> Am 09.09.2011 13:23, schrieb Paulo Assis:
>>
>> Hi,
>> I was thinking on using ffmpeg (libavcodec) sin
ieve this..
>
> -- Ajay Bhargav
>
>
> - "Paulo Assis" wrote:
>
> Hi,
> I would like to add support for H.264 stream format in guvcview, Could you
> post some stream info, or even better an example of raw data output (does
> the capture buffer contains an exac
Hi,
I would like to add support for H.264 stream format in guvcview, Could you
post some stream info, or even better an example of raw data output (does
the capture buffer contains an exact frame like in MJPEG ?)
Regards,
Paulo
2011/9/9 Ajay Bhargav
> Hi Srinivas,
>
> UVC fixes wont be needed f
;
>
>
> Am Mittwoch, den 07.09.2011, 16:58 +0100 schrieb Paulo Assis:
>> Hi,
>> if you are using any of the mpeg4 codecs, you will need a rather
>> powerful cpu for encoding at high frame rates, specially at any decent
>> resolution.
>> As an example I don'
dec. But
> still the same. Sound and audio is still unsyncron in guvcview. Cheese
> records all well but in 15 fps.
>
> Steffen
>
>
> Am Mittwoch, den 07.09.2011, 09:35 +0100 schrieb Paulo Assis:
>> Hi,
>> guvcview detects some sync issues, it seems although you sele
Hi,
guvcview detects some sync issues, it seems although you select 30
fps, for that resolution (1280x720) your hardware is just not powerful
enough to decode the MJPG stream and re-encode it with whatever coded
you are using.
Some solutions:
-reduce the fps
-reduce the resolution
-try using a less
Hi,
The flag is think is UVC_CONTROL_AUTO_UPDATE
and in the case of extension controls you really need to set it to
disable control caching, this is specially evident for control like
pan/tilt, that behave badly if this flag is not set.
see:
http://www.spinics.net/lists/vfl/msg38717.html
in the
index (maximum value).
Regards,
Paulo
2011/8/3 Paulo Assis :
> Hi,
> guvcview had a little problem when handling menu control indexes, it
> was using the combo box index instead of the real control menu index.
> This should be fixed in svn (svn://svn.berlios.de/guvcview/trunk) if
>
Hi,
guvcview had a little problem when handling menu control indexes, it
was using the combo box index instead of the real control menu index.
This should be fixed in svn (svn://svn.berlios.de/guvcview/trunk) if
you care to test it.
This worked fine for sequential menu indexes, but this specific c
Hi,
2011/8/2 Laurent Pinchart :
> Hi Carl,
>
> On Tuesday 02 August 2011 07:29:47 Carl Michal wrote:
>> Hi Laurent,
>>
>> I understand there were changes made in the exposure settings
>> in 3.0. I just installed 3.0 and have some new/different issues here.
>>
>> I have two cameras available: a qu
Hi,
your camera mic is supported by the snd-usb-audio alsa driver (
http://alsa.opensrc.org/Usb-audio ), this is a totally different
driver and specification from uvcvideo (video only).
Anyway is the problem related to skype only or do other apps like
audacity, suffer from the same issues?
Regard
Hi,
Some documentation on the subject:
http://www.quickcamteam.net/uvc-h264
Regards,
Paulo
2011/6/16 Ajay Bhargav :
> Hi Alexey,
>
> Thanks for reply, Well i have already done this before even i saw that
> patches in mailing list... I am able to add /dev/video0 device on my machine
> but i am no
Hi,
this looks like a faulty connection.
Try a different usb port, if this doesn't help you should check the
camera cable.
Regards,
Paulo
2011/6/13 Ian Freeman :
> I can get working video from this device for a limited amount of time
> before it disconnects from the usb system.
>
> dmesg looks li
Hi,
2011/6/11 hagar :
> I have a Z-Star USB Digital Microscope It is supposed to have the following
> specifications -
>
> ManID - 0ac8
> DevID - 3610
> Image - 1.3 MP
> Bus - USB 2.0
> Mag - 20x - 400x - ( Manual - More like Focus )
> Capture - Still & Video
> Modes - 1600x1200, 1
ormance, streaming in yuyv or mjpg on a usb2
connection makes no big difference although you should be able achieve
better fps with mjpg at higher resolutions.
YUYV is more limited due the higher usb bandwidth needed.
Regards,
Paulo
>
> Many thanks,
> Naruka
>
> On Thu, Jun 9, 2011 at 8:
Hi,
2011/6/7 Alexey Fisher :
> On Mo, 2011-06-06 at 17:31 -0700, Carl Michal wrote:
>> Hello,
>>
>> I'm having some trouble with a Quanta integrated webcam. It identifies
>> itself as: Laptop_Integrated_Webcam_2HDM, usbid: 0408:2fb1. This is built
>> in to a Dell XPS-15 (L501X).
>>
>> The uvcvid
Hi,
>
> I've had a look and it indeed there is a focus control. Considering that by
> default it is set on 0 (and it was set on 0 during operation), does this
> mean that it is on auto?
>
This should be "focus absolute", if set on 0 then focal length should
be set near infinite, that is good eno
Hi,
2011/4/26 Davide Marchi :
> Hi,
> i'm trying to enable the acer 5635z[04f2:b044] webcam (on
> www.ideasonboard.org/uvc/ the webcam result ok) ;
>
> for this i've follow the http://git.linuxtv.org/media_build.git procedure
> and build and installed the modules:
>
> git clone git://linuxtv.org/
Hi,
>
> 1. Would this be fairly specific to the Logitech QuickCam 9000, or is a more
> generic issue with webcam sensors?
Neither, you just need to lower exposure time.
> 2. Are other webcams better in this respect?
I don't think so, you can control exposure quite easily with this cam.
> 3. Ca
Hi,
>
> What is the proper way to disable the LEDs on the Quick Cam Pro 9000 and
You must use logitech extension controls for this,
you can use uvcdynctrl from libwebcam (command line) or guvcview
(gtk), you must be root to add these controls to the driver (libwebcam
installs a udev script to han
-- Forwarded message --
From: Paulo Assis
Date: 2011/3/29
Subject: Re: [Linux-uvc-devel] Creative VF0700 Live! Cam Chat HD works
everywhere, except highly distorted video in Skype
To: Benson Bear
2011/3/29 Benson Bear :
> On Mon, Mar 28, 2011 at 4:26 AM, Paulo Assis wr
Hi,
you could also try preloading libv4l, something like:
LD_PRELOAD=/usr/lib/libv4l/v4l2convert.so skype
Regards,
Paulo
2011/3/28 Benson Bear :
> On Sun, Mar 27, 2011 at 7:18 AM, I wrote:
>
>> This camera works nicely in everything like cheese, camstream, camorama,
>> xawtv and guvcview. It d
Hi,
> bFunctionClass255 Vendor Specific Class
> bFunctionSubClass 3
The camera is not uvc compatible, should read something like:
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
so I don't think it will work with the uvc dri
Hi,
2011/3/18 Paul Jurczak
> Hello,
>
> I there any documentation available about XU (extension unit) for webcams
> other than Logitech? XML definition files for uvcdynctrl maybe? I'm
> specifically looking for disabling on-board image processing in order to get
> raw Bayer data. Large number of
Hi,
2011/3/11 Alexey Fisher :
> Raw stream is "simple", for example YUYV need 16 bits to describe one
> pixel. No extra action is done on this stream. Even if the camera lie
> about it setting, we can still calculate it our self. For example if you
> use YUYV 640x480 with 30 fps:
> 640×480×16=4915
Hi,
2011/3/10 Alexey Fisher :
> Compressed stream is not really predictable. Every camera can act
> differently, so my be it will brick more than fix.
>
Actually one can assume if you need this quirk, the camera is already broken.
So I would see enabling mjpg bandwidth calculation with this quirk
Hi,
please check this link:
http://forums.quickcamteam.net/showthread.php?tid=1305
with a little fix to the previous patch the camera seems to work fine
with at least two units streaming at the same time.
I can't send an updated patch right now since my adsl connection is on
the slow side at the
Hi,
2011/2/19 modysama :
> Paulo Assis gmail.com> writes:
>
>> > The problem appears when changing the resolution:
>> Are you saying it works on a higher resolution but falls on a lower one?
>
> The problem:
>
> Webcam work only on ""&q
Hi,
> The problem appears when changing the resolution:
Are you saying it works on a higher resolution but falls on a lower one?
The fix bandwidth quirk only works on uncompressed streams (yuv), if
you pick mjpg or any other format (libv4l will convert from mjpg) then
this quirk is useless.
Make
webcam (maybe in BIOS) it would be great.
Regards,
Paulo
2011/2/18 Modysama :
> Paulo Assis gmail.com> writes:
>
>>
>> Hi, I find strange the following output from luvcview:
>>
>> Frame format: YUYV (MJPG is not supported by device)
>>
>> Your lsusb
Hi, I find strange the following output from luvcview:
Frame format: YUYV (MJPG is not supported by device)
Your lsusb output seems to indicate that MJPG is indeed supported.
Could you post the output of guvcview --verbose?
This should list all video formats available in your device (and the
one
Hi,
This may be caused by auto exposure, in dark environments exposure
increases so fps is reduced despite the requested value.
In some cameras you can disable auto exposure so that you always get
the requested fps, but some lower end models don't have support for
this control .
Regards,
Paulo
20
Carlos Hi,
2011/2/15 Carlos Silva :
> No help on this? :(
>
> On Tue, Feb 1, 2011 at 23:32, Carlos Silva wrote:
>>
>> Hi,
>> I recently bought an HP Pavillion DV3 laptop that has an integrated
>> webcam. After searching a while I found out that the webcam is an UVC webcam
>> but it isn't on the l
Hi,
> [11532.813381] usb 2-1.1: new full speed USB device using ehci_hcd
Are you connecting your camera to a usb1.1 port ?
The camera should be detected as a High Speed device.
check the difference here:
http://www.photoxels.com/article-usb-2.0-high-speed-vs-full-speed.html
Regards,
Paulo
2011/
Hi,
2011/1/25 Laurent Pinchart :
> On Monday 17 January 2011 10:23:34 Paulo Assis wrote:
>> I think if this was bandwidth related the error returned by the driver
>> would be different, besides the bandwidth required for the c600 is the
>> same and it works with this one.
>
Hi,
2011/1/17 loody :
> hi all:
> I really appreciate all you kind help :0
> 2011/1/17 Paulo Assis :
>> Just get a uvc camera they have the best support under linux:
>> http://www.ideasonboard.org/uvc/#devices
> Actually why I post this mail because I want to know what kin
Just get a uvc camera they have the best support under linux:
http://www.ideasonboard.org/uvc/#devices
Regards,
Paulo
2011/1/15 loody :
> Dear all:
> I intend to buy a webcam for video conference meeting over skype under Ubuntu.
> 1. Shall I buy any webcam will be fine?
> 2. or I have to buy the
I think if this was bandwidth related the error returned by the driver
would be different, besides the bandwidth required for the c600 is the
same and it works with this one.
The camera just seems to crash, even controls stop responding.
Regards,
Paulo
2011/1/17 Mitar :
> Hi!
>
> 2011/1/14 Radek
Radek,
Please attach the full dmesg output when starting video capture with
the second camera.
Also increase log verbosity first:
something like this:
rmmod uvcvideo
modprobe uvcvideo trace=65535
You should also refer your capture settings (if I remember MJPG
640x480@24 fps) and that if you use o
#x27;ve tried to set the smaller resolutions than 640x480 and I
> got the same result.
> I've attached "guvcview --verbose" output.
>
> On 1/6/11, Paulo Assis wrote:
>> You may need to disable autoexposure.
>> Could you please try it with guvcview ?
>>
"mplayer tv:// -fps 5" — I really see 5 fps.
>
> I really don't care in which resolution my camera should work, but I
> want to get 30 fps.
>
> Also, my CPU load is ~25%, the video card works with hardware
> acceleration. I've tried different mplayer video driver
sing smth like morphing?
>
> If someone knows how to do that using userspace software in GNU/Linux
> — please, let me know.
>
>
> Best regards,
> Alexander.
>
> On 1/6/11, Paulo Assis wrote:
>> Hi,
>> Did you notice the "(Software enhanced)" remark ?
>
Hi,
Did you notice the "(Software enhanced)" remark ?
This means a lower resolution is used to achieve the 30 fps and then
the windows driver resizes the image frame to 800x600 (through
software).
The linux uvc driver (like any other v4l2 driver) just exposes the
"real" resolutions and frame rates
Hi,
2010/11/25 :
> YESSS !!!
>
> Thank you Paulo, I tried that and I could get image in guvcview :D
>
> I guess I have to add this to /etc/modprobe.d/somewhere_in_slackware but I
> guess I shouldn't have too much trouble with that.
>
> Now I wonder if there is a way to use higher resolutions or i
Claudio hi,
2010/11/24 :
> Hi Laurent,
>
> http://www.pasteall.org/17101 is the output of lsusb -v, line 176 starts
> blurb about webcam.
>
>> Have you tried the FIX_BANDWIDTH quirk ?
>
> No, where is that ? kernel source ?
>
just do:
rmmod uvcvideo
modprobe uvcvideo quirks=128
This will make
Hi,
2010/11/23 :
> I'm using usb keyboard, wacom tablet, usb scanner and usb mouse. I tried
> with scanner and wacom unplugged but still guvcview and kopete gives the
> same (except that now camera is using /dev/video1 instead of /dev/video0)
This is a bit strange, do you have more than one vide
Have you tried any other app besides vlc ? luvcview, guvcview, cheese, ...?
Regards,
Paulo
2010/11/23 :
> Hi,
>
> I bought a cheap Genius FaceCam 310 usb webcam, which is promoted as being
> supported in Linux Kernel > 2.21 (so it says in the box !)
>
> I'm testing in under Slackware 13.1, and t
] uvcvideo: Added
>> control 0000-0000---0101/3 to device 3 entity 2
>> Nov 19 15:25:13 tim-H55N-USB3 kernel: [ 687.331838] uvcvideo: Added
>> control ----0101/7 to device 3 entity 2
>> Nov 19 15:25:13 tim-H55N-USB3 kernel: [ 687.
Hi,
2010/11/19 Neil Benn :
>
>>
>> This as been reported before:
>> http://www.mail-archive.com/linux-me...@vger.kernel.org/msg19535.html
>>
>> and it should be fixed in the latest libv4l, but older versions will
>> still have a 16 frame size limit.
> However this is just a warning though? From
Hi,
2010/11/19 Laurent Pinchart :
> Hi Neil,
>
> On Thursday 18 November 2010 16:00:00 Paulo Assis wrote:
>> Neil Hi,
>>
>> Could you please post the relevant dmesg output.
>> Increasing uvcvideo verbosity would also be a good help.
>>
>>
>&g
Neil Hi,
Could you please post the relevant dmesg output.
Increasing uvcvideo verbosity would also be a good help.
--- snip ---
> libv4lconvert: warning more framesizes then I can handle!
> libv4lconvert: warning more framesizes then I can handle!
--- snip ---
No problem with this, libv4l only
loose frames. But my
> application is acting as still camera and in this case having one
> buffer should be fine. Is my understanding correct?
>
> Thanks
>
> On Wed, Nov 3, 2010 at 8:49 PM, Paulo Assis wrote:
>> Hi,
>> have you tried increasing the work load on your sy
Hi,
2010/10/19 oldcpu :
> OK, ... well, I went ahead and ordered it via mail order. :)
>
> I figure if it does not work well, I have many friends who use MS-Windows
> who would love to have it as a gift. :)
>
> If it does work reasonably well, what will I have to do to have the UVC
> compatibili
Hi,
2010/10/17 oldcpu :
>
>
> It appears that Logitech HD Pro Webcam C910 (046d:0821) is functional with
> the uvc driver.
>
> Why is it not on your UVC list: http://www.ideasonboard.org/uvc/ ?
Maybe because it's a rather recent model ;-D and no one confirmed it
yet as uvc compatible (with lsusb
Hi,
Audio in this camera is handled by usb-audio driver not uvcvideo (video only).
In any case when grabbing audio from it make sure you set the sample
rate to 16 Khz (mono), a sound server like pulse should convert the
sample rate and channels automatically, but if you are not using it
then you mu
Hi,
did you connect the camera to a usb1.1 port?
Devices can/will reduce available resolutions when connected to lower
speed usb ports.
Make sure you plug it directly to a usb2 port.
Regards,
Paulo
2010/10/4 Nick Rout :
> My first post here so if I am in the wrong place, let me know.
>
> I am set
Hi,
2010/9/21 SanitoeterNo1 :
> Hi,
> I know uvc does not offer any resolutions above 640x480, but I bought this
> laptop with a 2 megapixel camera, so I suppose this is a driver problem,
> otherwise I'll have to talk to the Lenovo support.
The camera itself doesn't advertise any resolution above
Hi,
2010/9/21 SanitoeterNo1 :
> Hi,
> since lsusb -d 17ef:481c does not print any more information, I added the -v
> option. Here is the output:
>
Yes, I forgot that, sorry.
If you look down the descriptors, you will notice that the camera
doesn't support more than 640x480:
wWidth( 0)
Hi,
Could you please post the output of lsusb -d 17ef:481c
Regards,
Paulo
2010/9/20 SanitoeterNo1 :
> Hello,
> I own a Lenovo SL510 laptop with an integrated webcam.
> The camera works well but it doesnt allow me to select resolutions higher than
> 640x480 regardless of which program I use, altho
Hi,
you should post this on the linux-media mailing list:
http://www.linuxtv.org/news.php?entry=2009-01-06.mchehab
I see no recent changes for pwc:
http://git.linuxtv.org/v4l-dvb.git?a=history;f=drivers/media/video/pwc;hb=1c1371c2fe53ded8ede3a0404c9415fbf3321328
although I seem to remember a patc
Hi,
No usd ID is needed for the uvc driver.
UVC cameras identify themselves as such:
http://www.ideasonboard.org/uvc/faq/
ID's found on the driver code are merely used for passing driver
quirks for some cameras with known issues.
So first check if your camera is uvc compliant (see previous link)
2010/8/26 Laurent Pinchart :
> Hi Oz,
>
> On Wednesday 25 August 2010 21:15:17 Oz Nahum wrote:
>> Hi Everyone,
>> Thanks for the help!
>> I managed to activate the webcam ! it's working with Kernel 2.6.34.
>> Is there a way to donate money to the UVC project ?
>
> I'll let Paulo answer that, as he'
0
> mii 2714 1 jme
> usbcore 98386 4 uvcvideo,uhci_hcd,ehci_hcd
> nls_base 4541 1 usbcore
>
> I am also trying to build a newer kernel version 2.6.34 - we will see
> if that works. Any other ideas ?
>
> Thanks,
>
> O
This problem has already been reported some time back:
http://www.mail-archive.com/linux-uvc-devel@lists.berlios.de/msg04511.html
I'm not sure if this patch made it in to 2.6.32, so you should really
install a newer driver version.
Just disable whatever modules are causing you trouble with "make
m
Hi,
could you please post the output of "lsusb -v -s 5986:0241"
dmesg output after connecting the camera would also be helpful
Regards,
Paulo
2010/8/25 Oz Nahum :
> Hi Everyone,
>
> I have the following webcam:
> Bus 001 Device 002: ID 5986:0241 Acer, Inc BisonCam, NB Pro
>
> According to the u
Hi,
2010/8/25 Michelle Konzack :
> Hello Paulo Assis,
>
> Am 2010-08-24 23:31:00, hacktest Du folgendes herunter:
>> Yes it is:
>>
>> http://packages.debian.org/unstable/main/guvcview
>>
>> and you can always build it if you need ;-D
>
> On a
Hi,
2010/8/24 Michelle Konzack :
> Hello Paulo Assis,
>
> Am 2010-08-24 11:03:25, hacktest Du folgendes herunter:
>> > Frame rate: 20/1 fps (requested frame rate 30 fps is not supported by
>> > device)
>>
>> I think luvcview uses the frame rate you req
Hi,
>
> OK, if I now start
>
> [ command 'luvcview' ]--
> luvcview 0.2.4
>
> SDL information:
> Video driver: X11
> A window manager is available
> Device information:
> Device path: /dev/video0
> Stream settings:
> Frame format: MJPG
> Frame
Hi,
All new logitech models are UVC compliant, this includes all c models:
http://www.quickcamteam.net/devices/logitech_uvc_device_list.pdf
the above list doesn't include the new models yet, but the c310 is
"just" an update on the c300.
In fact I don't think manufacturers are still releasing new
Hi,
2010/7/7 loody :
> Dear all:
> I bought a webcam and video part works fine with universal video driver.
> my question are:
> 1. how could I let the mic works too?
The mic should work through the usb audio alsa driver: snd_usb_audio
> What modules or configures I should add in kernel?
Thi
?
>
>
>
> В Чтв, 24/06/2010 в 15:44 +0100, Paulo Assis пишет:
>> Andrew Hi,
>> Can you try setting quirks to 2:
>>
>> rmmod uvcvideo
>> modprobe uvcvideo quirks=2 trace=65535
>>
>> please post also a working dmesg log (from vlc)
>>
>
;
>
> В Чтв, 24/06/2010 в 10:31 +0100, Paulo Assis пишет:
>> Andrew Hi,
>> you can increase the driver verbosity by setting the trace parameter:
>> rmmod uvcvideo
>> modprobe uvcvideo trace=65535
>>
>> trace level is given by grouping several flags so you can s
between frame: 1/25, 1/20, 1/15, 1/10,
> { discrete: width = 320, height = 240 }
> Time interval between frame: 1/25, 1/20, 1/15, 1/10,
> { pixelformat = 'YV12', description = 'YV12' }
> { discrete: width = 640, height = 480 }
> Time interval between frame:
= 'YU12' }
> { discrete: width = 640, height = 480 }
> Time interval between frame: 1/25, 1/20, 1/15, 1/10,
> { discrete: width = 320, height = 240 }
> Time interval between frame: 1/25, 1/20, 1/15, 1/10,
> { pixelformat = 'YV12', description = &#
Hi,
have you tried with other apps (luvcview or guvcview) ?
You may also try with other formats, like YUYV, maybe the camera just
doesn't support MJPG.
Camera supported formats can also be checked with lsusb.
Regards,
Paulo
2010/6/20 Andrew V Kuzmin :
> Hello!
>
> Got problems with work of webcam
Natalia Hi,
Please check guvcview source code: jpgenc.c; dct.c; huffman.c and also
vcodecs.c(compress_frame) for a built in MJPG/JPG encoder.
Regards,
Paulo
2010/6/16 Natalia Portillo :
> Hi,
>
> Continue with my creation of a UVC webcam inside the QEMU emulator, I've
> found a behavior that mak
Hi,
2010/6/15 Franz TRIERWEILER :
> Hi,
>
> I am porting a library based on uvc to an ARM core and am creating a RPM
> package.
>
> My library build needs uvcvideo.h. I expected this header file to be simply
> available from Linux headers /usr/src/linux/include. In fact it is only
> availabe from
ideo window, it ate 100% of
> CPU powers and A/V was out of sync. I didn't know which one is the
> bottleneck in skype. That's why I asked for help here.
Skype is closed source so I don't know anything about its internals, sorry.
Best Regards,
Paulo Assis
> I am new to
Hi,
2010/5/26 Santiago Segura :
>
> Hi,
> The full system is freeze.
> About the hardware problem, maybe you are right, but the curious is that
> sometimes the same board is three days working and sometimes only 12 horus.
> I think that is to much time for a hardware problem.
Not really, consider
Santiago Hi,
2010/5/25 Santiago Segura :
>
> Hi Paulo,
> no, when the system hangs, do not leave any message related.
Is this a full system freeze or just your app ?
If it's a system freeze it may be related to a hardware problem (usb
controler, memory, ..)
if it's just your app, then the problem
Hi,
Do you get any messages on the system log (dmesg) ?
Regards,
Paulo
2010/5/25 Santiago Segura :
> Hi!
>
>
>
> I have a strangle problem using two cameras at the same time.
>
>
>
> My application (webcam security) works perfectly, I suppose.
>
> But after some hours (24 hours or more) the syste
Hi,
2010/5/17 Gavin McCullagh :
> Hi,
>
> On 17 May 2010 10:36, Paulo Assis wrote:
>
>> You should have bought the Bresser package at Lidl, that one has a uvc
>> camera that works very well.
>> (actually the fps is clipped to 5 due to the high exposure time,
Gavin Hi,
2010/5/17 Gavin McCullagh :
> Hi,
>
> I picked up one of these cheap USB microscopes and was wondering if it
> might be usable with linux. As it's made by Aveo, I thought the UVC
> driver might be convinced to work with it.
>
You should have bought the Bresser package at Lidl, that one
Hi,
2010/5/16 :
>
> - "Adrian Sergiu Darabant" wrote :
>
>> My need is to stream from both cameras in the same time.
> (...)
>> I tried to do that and I am succeeding up to query and map buffers but
>> then when doing VIDIOC_STREAMON - the first camera starts and the
>> second one always get
you use some other
control application: guvcview, uvcdynctrl and set this to 0, maybe the
one your using is trying to set it to the reported minimum value: 20
Best Regards,
Paulo
> hope that helps in debug..
>
> MRL
>
> Em Tue, 11 May 2010 17:43:44 +0100
> Paulo Assis esc
Mario Hi,
2010/5/11 Mario Rui Luzeiro :
> I've just tryed this webcam and there are some issues setting exposure
> controls with v4l2ucp.
> There are some options "auto.. manual.. shutter priority.."
> and exposure control that can slide from 20 to 5000 .. but it works with a
> strange behaviour.
2010/5/7 Laurent Pinchart :
Laurent,
> Hi Paulo,
>
> On Tuesday 04 May 2010 10:36:19 Paulo Assis wrote:
>> > What happens to the camera settings when the computer is rebooted? Are
>> > they stored in some non-volatile memory in the camera? That would be
>> > aw
Hi,
Are you sure the camera supports MJPG ?
It seems to report only a uncompressed format (YUYV ?).
You can check the supported formats with luvcview, guvcview or
uvcdynctrl (libwebcam)
Best regards,
Paulo
2010/5/5 HKairpost :
> u...@hk.airpost.net wrote:
>>
>> Hello,
>>
>> I have a setup where a
Alan Hi,
>
> Yes, the profiles are very useful. Your program in general is very
> useful, I hope you make a stable release soon, some distros only ship
> release versions of programs (like mine for example).
>
The latest stable release is 1.3.1 (adds camera button support),
unfortunately some dis
>
> Alan
>
>
> On Fri, Apr 30, 2010 at 3:15 AM, Paulo Assis wrote:
>> Alan Hi,
>> Can you test with guvcview (http://guvcview.berlios.de)?
>>
>> Maximum frame rate also depends on the pixel format and resolution, so
>> choose a format and resolution that
Alan Hi,
Can you test with guvcview (http://guvcview.berlios.de)?
Maximum frame rate also depends on the pixel format and resolution, so
choose a format and resolution that supports a high frame-rate (e.g
m...@800x600)
Regards,
Paulo
2010/4/29 Alan :
> I have a problem with my camera: the framer
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