-- Forwarded message --
From: Paulo Assis
Date: 2017-04-20 12:04 GMT+01:00
Subject: uvcvideo extension controls
To: Laurent Pinchart
Cc: Linux Media Mailing List , aUDIo
Laurent Hi,
I've just noticed that uvcvideo extension controls no longer work
properly, for instanc
I'll have time to test
anything else for the next coule of days.
Regards,
Paulo
2014-11-05 14:05 GMT+00:00 Laurent Pinchart :
> Hi Paulo,
>
> On Wednesday 05 November 2014 10:13:45 Paulo Assis wrote:
>> 2014-11-04 23:32 GMT+00:00 Sakari Ailus :
>> > Sakari Ailus wrot
Hi,
2014-11-04 23:32 GMT+00:00 Sakari Ailus :
> Sakari Ailus wrote:
>> yavta does, for example, print both the monotonic timestamp from the buffer
>> and the time when the buffer has been dequeued:
>>
>> http://git.ideasonboard.org/yavta.git>
>>
>> $ yavta -c /dev/video0
>>
>> should do it.
I've add to change guvcview so that it now generates it's own
monotonic timestamps, kernel timestamps (uvcvideo at least), caused a
similar problem, e.g:
I would get a couple of frames with correct timestamps, then I would
get at least one with a value lower than the rest, this caused
playback to s
rt :
> Hi Paulo,
>
> On Wednesday 01 October 2014 11:48:26 Paulo Assis wrote:
>> Laurent hi,
>>
>> 2014-09-30 23:31 GMT+01:00 Laurent Pinchart:
>> > Hi Paulo,
>> >
>> > Thank you for investigation this.
>> >
>> > On Tuesday 30 Sept
Laurent hi,
2014-09-30 23:31 GMT+01:00 Laurent Pinchart :
> Hi Paulo,
>
> Thank you for investigation this.
>
> On Tuesday 30 September 2014 13:56:15 Paulo Assis wrote:
>> Ok,
>> so I've set a workaround in guvcview, it now uses the length filed if
>> bytes
sion 1.4.0 (debian), virtual formats (rgb3,
bgr3, yu12, yv12) are not working with that version.
Regards,
Paulo
2014-09-30 14:12 GMT+01:00 Nicolas Dufresne :
>
> Le 2014-09-30 04:50, Paulo Assis a écrit :
>
>> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1362358
>>
&
Regards,
Paulo
2014-09-30 9:50 GMT+01:00 Paulo Assis :
> I referring to the following bug:
>
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1362358
>
> I've run some tests and after increasing verbosity for uvcvideo, I get:
> EOF on empty payload
>
> this seems c
I referring to the following bug:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1362358
I've run some tests and after increasing verbosity for uvcvideo, I get:
EOF on empty payload
this seems consistent with the zero size frames returned by the driver.
After VIDIOC_DQBUF | VIDIOC_QBUF, I
Hi,
2014-03-05 23:01 GMT+00:00 William Manley :
> Hi All
>
> I've been attempting to use the Logitech C920 with the uvcvideo driver.
> I set the controls with v4l2-ctl but some of them change during
> VIDIOC_STREAMON. My understanding is that the values of controls should
> be preserved.
>
> Min
Hi,
guvcview just handles this like any other V4L2 device. You should look
at the driver in this case, and check what it does when a
VIDIOC_STREAMOFF is received.
Regards,
Paulo
PS: adding linux media to CC
2014/1/1 Ayoub, Hani :
> Hi,
>
> I’m trying to bring up a device which sends data using
Hi,
I'm repeating myself, but this seems the proper place to post this.
This patch causes a regression with the logitech c930e.
Please see comments below:
2013/11/10 Laurent Pinchart :
> Hi Pawel,
>
> Thank you for the patch.
>
> On Friday 30 August 2013 11:17:02 Pawel Osciak wrote:
>> This add
Hi,
2013/11/11 Laurent Pinchart :
> Hi Paulo,
>
> On Thursday 10 October 2013 11:27:37 Paulo Assis wrote:
>> Hi,
>> just want t know the current state on this series.
>>
>> I'm currently adding h264 stream preview support to guvcview.
>> It's
Hi,
just want t know the current state on this series.
I'm currently adding h264 stream preview support to guvcview.
It's already working fine on uvc 1.1 cameras like the BCC950 but for
uvc 1.5 devices like the c930e it could really use some driver
support.
Bets Regards,
Paulo
2013/8/30 Pawel Os
o hear them
>
> All the best
>
> Phil
>
>
> - Original Message -
> From: Paulo Assis
> To: phil rosenberg
> Cc: "linux-media@vger.kernel.org"
> Sent: Tuesday, 11 June 2013, 11:13
> Subject: Re: Corrupt Raw webcam data
>
> Hi,
> You should sel
bug in either the webcam's UVC support or the UVC
> driver? If so I presume there is no likely quick workaround.
>
> Phil
>
> ________
> From: Paulo Assis
> To: phil rosenberg
> Cc: "linux-media@vger.kernel.org"
> Sent: Tuesday, 11 Jun
For the list (again)
-- Forwarded message --
From: Paulo Assis
Date: 2013/6/11
Subject: Re:
To: phil rosenberg
Cc: "linux-media@vger.kernel.org"
Hi,
make sure you are streaming in YUYV format and not in MJPG or any of
the libv4l formats since these are decoded from
Hi,
I think any of these lists would do.
I would probably post it to linux-media and cc linux-uvc-devel
Regards,
Paulo
2012/6/6 Tony.Nie :
> Hi All:
>
> The latest UVC driver can't work well with USB3.0 WebCam for it
> can't select a suitable alternate setting.
> I fixed the bug.
>
> Can
Hi,
This bug also causes the camera to crash when changing fps in
guvcview, uvc devices (at least all the ones I tested) require the
stream to be restarted for fps to change, so in the case of this
driver after STREAMOFF the camera just becomes unresponsive.
Regards,
Paulo
2012/5/22 Lluís Batlle
ack?
>
> I guess we could start with that right away with my proposed patches,
> if you can make an initial git repo available I can rebase on top
> of that and then send the patches with git send-email (so 1 patch / mail)
> for review?
>
> Either way thanks for working on thi
h that and add add them to 0.2.
I still need to check with him how he wants to handle the 0.3 version,
since it has a lot of new code ( and some extra apps ).
Regards,
Paulo
2012/5/3 Karl Kiniger :
> Hi Paulo,
>
> On Wed 120502, Paulo Assis wrote:
>> OK, so UVCIOC_CTRL_ADD is no long
OK, so UVCIOC_CTRL_ADD is no longer available, now we have:
UVCIOC_CTRL_MAP and UVCIOC_CTRL_QUERY, so I guess some changes are
needed, I'll try to fix this ASAP.
Regards,
Paulo
2012/5/2 Paulo Assis :
> Hi,
> yes, libwebcam depends on uvcvideo.h, I've only added this as a patc
eeded, but they do increase functionality
to some extent.
Anyway if this was just a libwebcam issue, guvcview should still be
able to add the controls, and apparently that's failing also.
Best regards,
Paulo
2012/5/2 Karl Kiniger :
> On Wed 120502, Paulo Assis wrote:
>> karl,
>
also at:
> http://permalink.gmane.org/gmane.linux.kernel/1257500
>
> Greetings,
> Karl
>
> On Wed 120502, Paulo Assis wrote:
>> Karl Hi,
>> I'm using a 3.2 kernel and I haven't notice this problem, can you
>> check the exact version that causes it.
&g
Karl Hi,
I'm using a 3.2 kernel and I haven't notice this problem, can you
check the exact version that causes it.
Regards,
Paulo
2012/5/2 Karl Kiniger :
> Please can someone shed a little light on this?
>
> Greatly appreciated,
> Karl
>
> On Tue 120424, Karl Kiniger wrote:
>> Dear all,
>>
>> guv
Hi,
>From what you describe I would say that during conversion a YUYV (2
bytes per pixel) size (be it a buffer or loop iterations) is being
used for RGB3 (3 bytes per pixel), so you only get 2/3 of the picture.
Does this happen in any resolution ?
Regards,
Paulo
2012/4/5 Paulo Assis :
&
Hi,
BGR3, RGB3, YU12 and YV12 are provided through libv4l, the original
unconverted stream format provided through uvcvideo driver is YUYV, if
this is fine then this is probably an issue with libv4l.
Regards,
Paulo
2012/4/5 Chris Rankin :
> Hi,
>
> I have a UVC video device, which lsusb describes
Hi,
2011/8/13 Veda N :
> what should be the size of a raw bayer data from the driver.
>
> for 640x480 = i get 640x480x2.
Is this in bytes?
>
> Shouldnt i get more? It shoule be more than yuv422/rgb565
>
No, that depends on the pixel size, so for 8 bit pixel you should get
640x480 bytes, for 12
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
Hi,
2010/12/18 Theodore Kilgore :
>
> Does anyone know whether, somewhere in the kernel, there exists a scheme
> for detecting whether the external power supply of the computer is using
> 50hz or 60hz?
>
> The reason I ask:
>
> A certain camera is marketed with Windows software which requests the
Hi,
Since we are talking about V4L documentation, I would like to remind
of the timestamps subject since this is a recurrent issue.
The current spec refers to gettimeofday return value for the buffer
timestamps and as already discussed in previous posts, gettimeofday,
introduces a lot of issues, us
Hi,
2010/6/10 Jiajun Zhu :
> Thanks for the discussion.
> Based on my testing, the image timestamps or ktime is the system uptime in
> nanosecond, is this correct?
> For my application, I need to synchronize the camera image with other data
> which are all timestamped by gettimeofday().
Like I ex
PLEASE NO,
The current use of ktime is much better, timestamps are perfectly in
sync and will not suffer from time shifts if the clock value changes.
PLEASE just leave it like it is now.
Best Regards,
Paulo
2010/6/10 Jean-Francois Moine :
> Hi Mauro,
>
> The following changes since commit e411f2
2010/6/10 Jean-Francois Moine :
> On Thu, 10 Jun 2010 03:24:05 + (UTC)
> jiajun wrote:
>
>> I'm currently using the V4L-DVB driver to control a few logitech
>> webcams and playstation eye cameras on a Gubuntu system.
>>
>> Everything works just fine except one thing: the buffer timestamp
>> v
it integer controls since i don't
have any hardware that supports them.
Best Regards,
Paulo
[RFC] V4L2 Controls State Store/Restore File Format
AUTHORS: Paulo Assis
VERSION: 0.0.2
ABSTRACT
This document proposes a standard for the file format used by v4l2 applications
to store/restore the
Hi,
2010/5/23 Hans Verkuil :
> On Sunday 23 May 2010 15:40:26 Paulo Assis wrote:
>> Hans,
>>
>> 2010/5/23 Hans Verkuil :
>> > On Thursday 20 May 2010 16:42:01 Paulo Assis wrote:
>> >> Hi all,
>> >>
>> >> Below is a proposal for
Hans,
2010/5/23 Hans Verkuil :
> On Thursday 20 May 2010 16:42:01 Paulo Assis wrote:
>> Hi all,
>>
>> Below is a proposal for the file format to use when storing/restoring
>> v4l2 controls state.
>>
>> I've some doubts concerning atomically set control
that can
easily be integrated into any application, so I would rather not use
any external libs.
IMHO xml would be an overkill in this case, but if the general opinion
is that such format should be used instead I can easily change the
proposal to a xml format.
Regards,
Paulo
> Cheers,
> Mar
tate Store/Restore File Format
To: Paulo Assis
Cc: Laurent Pinchart ,
martin_ru...@logitech.com
Hi Paulo,
Clearly you've though quite a bit about this I had not realized
this would be this complex (with ordering issues etc.).
This looks like a good proposal to start with to me, I think it
w
Hi,
linuxtv uses mercurial (or git) not svn, please check the how-to:
http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers
regards,
Paulo
2010/2/8 loody :
> Dear all:
> I hear UVC is change its repository to linxutv.
> But I tried several possible reposit
Hi,
> The uvcdynctrl utility is part of the libwebcam project:
> http://www.quickcamteam.net/software/libwebcam
>
> But given that libwebcam is unmaintained and not used by anything AFAIK, I'm
> patching
> uvcdynctrl to no longer need it. The plan is to add uvcdynctrl to libv4l
> soon, as that
> i
e even use ihex directly
(request_ihex_firmware), is there a optimal format for this?
Regards,
Paulo
2009/12/18 Mauro Carvalho Chehab :
> Devin Heitmueller wrote:
>> On Fri, Dec 18, 2009 at 9:05 AM, Paulo Assis wrote:
>>> Hi,
>
>>> Is there any simpler/standar
Hi,
I'm currently porting the GPL linux-avc2210k driver (
http://www.freelists.org/archive/linux-avc2210k/ ) to V4L2.
The current version has it's own API that makes it incompatible with
any software except for specific user space apps (avcctrl, avctune)
bundled with the driver.
Since development s
Hi,
You have to unload the all the old modules before loading the new ones:
http://www.linuxtv.org/wiki/index.php/How_to_Obtain,_Build_and_Install_V4L-DVB_Device_Drivers#First_Use:_Out_with_the_Old.2C_In_with_the_New
otherwise you will get that type of errors.
Regards,
Paulo
2009/12/14 Nicolau W
d to
> set it like this:
>
> $ cat /etc/modprobe.d/uvcvideo.conf
> options uvcvideo trace=15 quirks=2
>
> regards all,
>
> joe
>
> On Wed, Dec 9, 2009 at 11:53 PM, Paulo Assis wrote:
>> You must reload the driver,
>>
>> rmmod uvcvideo
>> modprobe
UFS - Failed to delete buffers: Invalid argument (errno 22)
> closed v4l2 strutures
> free controls - vidState
> cleaned allocations - 100%
> Closing portaudio ...OK
> Terminated.
>
> are you sure with the web-page? i cannot see a relationship between
> dvb and uvcvideo. shouldn
,
> { discrete: width = 160, height = 120 }
> Time interval between frame: 1/30,
> checking format: 1196444237
> VIDIOC_S_FORMAT - Unable to set format: Input/output error
> Init v4L2 failed !!
> ERROR: Minimum Setup Failed.
> Exiting...
> Terminated.
>
>
> On Wed
2009/12/9 Valerio Bontempi :
> 2009/12/9 Paulo Assis :
>> Hi,
>> I've just responded to a similar issue in the linux-uvc list:
>> https://lists.berlios.de/pipermail/linux-uvc-devel/2009-December/005391.html
>>
>> Do you also have insertion errors when modprobi
Laurent,
> That's not enough to prevent a kernel crash. The driver can try to dereference
> ctrl->data if ctrl->info isn't NULL. You should only set ctrl->info if
> allocationg succeeds. Something like
>
> ctrl->data = kmalloc(ctrl->info->size * UVC_CTRL_NDATA, GFP_KERNEL);
> if (ct
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