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Today's Topics:

   1. Re: Lines on displayed image (Timothy Buchanan)


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Message: 1
Date: Wed, 27 Dec 2017 11:04:25 -0700
From: Timothy Buchanan <timothyebucha...@gmail.com>
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Lines on displayed image
Message-ID: <596ecc6a-8efe-433b-be5b-89a393535...@gmail.com>
Content-Type: text/plain; charset="utf-8"

That command? returns the? following:

 

Index: 0

Type: Video? Capture

Pixel format: ?YUYV?

Name: YUYV 4:2:2

 

I?ve attached the output from motion.log, also the camera3.conf file. I? made 
an avi file with vlc, but? it? is? too big to? send even when compressed.

 

Timothy

 

From: tosiara <tosi...@gmail.com>
Reply-To: Motion discussion list <motion-user@lists.sourceforge.net>
Date: Wednesday, December 27, 2017 at 6:47 AM
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Lines on displayed image

 

Timothy,

 

can you collect the following info:

 

output of "v4l2-ctl -d /dev/video0 --list-formats-ex"

a short sample video 2-3 seconds?

during motion run do you see any USB related messages in syslog (like URB 
packet error)?

Those lines look like a wrong bytes being written into buffer of there could be 
incomplete or truncated frames coming. If you don't see those lines in VLC that 
could mean you are using different resolution/pixel format with the player

 

On Wed, Dec 27, 2017 at 1:57 AM, MrDave <motionmrd...@gmail.com> wrote:

I'll add a issue to the project to address the abort. (There is already a bug 
filed upstream in ffmpeg on it).  

It is surprising this option does not function.  There are only two options 
that are specified in Motion for this method.  The dimensions(height/width) and 
the framerate.  If you try a `ffprobe` of the device, it should report the 
device defaults on these and you can try those as the configuration options in 
Motion.  

MrDave

 

On 12/26/2017 10:14 AM, Timothy Buchanan wrote:

I upgraded to 4.1.1. Using netcam_url v4l2:///dev/video1 and each palette 0 
through 17 and 21, I get ?unable to open video device,? except with palette 8, 
which causes a program abort. Running ffplay ?f /dev/video1 produces a good 
image, though I get repeated warnings that the dequeued vl42 buff contains 
corrupted data (691200 bytes). Suggestions? Thanks.

 

Timothy

 

From: MrDave <motionmrd...@gmail.com>
Reply-To: Motion discussion list <motion-user@lists.sourceforge.net>
Date: Sunday, December 24, 2017 at 2:12 PM
To: <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Lines on displayed image

 

Yes, the v4l2 via the netcam_url option functionality was added starting in 
version 4.1 so it will not work with 4.0. 

Regarding the  "unhelpful" message on the standard being set.  45056 means it 
set it to V4L2_STD_NTSC.  Other video standards Motion may report are 16711680 
for V4L2_STD_SECAM and 255 for V4L2_STD_PAL.  (This is legacy code to print the 
number rather than a readable message).

This is the first that I've heard of a usb device reporting options to use 
different video standards so changing that parameter may assist.

MrDave

 

On 12/24/2017 11:46 AM, Timothy Buchanan wrote:

I decided to start again from scratch by installing stretch (had been using 
Jessie). The included add/remove GUI installed motion 4.0, not 4.1. That 
version?s motion.conf offers the netcam option, but using netcam_url 
v4l2:///dev/video0 returns a gray image with the error ?could not open.? Is it 
only 4.1 that works with netcam? Curiously, vlc media player will open the 
camera and display v4l2:///dev/video0 when doing so.

 

As to the usb-to-analog device, it is the UCEC adapter sold on amazon and has 
the UTV007 chipset. I have not installed any drivers. Where would I find the 
driver Linux is using?

 

Thanks again for help.

 

Timothy

 

From: tosiara <tosi...@gmail.com>
Reply-To: Motion discussion list <motion-user@lists.sourceforge.net>
Date: Thursday, December 21, 2017 at 9:59 AM
To: Motion discussion list <motion-user@lists.sourceforge.net>
Subject: Re: [Motion-user] Lines on displayed image

 

I have had some issues with usb-to-analog devices, like Easycap and similar. At 
that time indeed only motion had those issues, but after some changes in the 
driver the issues were resolved. So it could be some compatibility with the 
hardware's driver. Can you provide more details what kind of capture card you 
are using?

As a workaround you can use the way MrDave mentioned - capture through the 
netcam. Specify this url:
netcam_url v4l2:///dev/video0

Please report back if you still get corrupted image using netcam

 

On Thu, Dec 21, 2017 at 6:43 PM, Timothy Buchanan <timothyebucha...@gmail.com> 
wrote:

MrDave and tosiara, thanks for help. I?ve attached the motion log and output of 
one of the cameras (there are three, but all the same) to the command v4l2-ctl 
-d /dev/video0 ?all.

Palette YUYV seems to be the only one supported, and that is chosen. I set the 
config to use NTSC, but it always chooses ?standard method 45056.? I don?t find 
any info on that.

Do you see problems in the output files I?ve attached? Thanks again.

timothy




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