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Hello,<br>
<br>
The answer about v4l2 driver for xiQ camera from Ximea :<br>
<br>
<p>Dear Mr.Jack,</p>
<p>Based on information of our linux implementation specialist we
are not planning implementation of v4l2 because it is quite
complicated task and there are no big potential from current
customers.</p>
<p>Probably gstreamer interface would be simpler for implementation,
but unfortunately also this interface is not in our plan pipeline.</p>
Best regards<br>
<br>
<br>
Hello,
<p> I have a xiQ camera and test it on my Ubuntu. It works well
with streamViewer provided by your staff.<br>
But for a lot of people working under linux platform like me,
it would be very nice to use v4l2 driver. This is free/open and a
standard on linux.<br>
Are you working on this solution (to make v4l2 driver for your
xiQ USB3.0 camera) ?<br>
Best!<br>
++</p>
<p> Jack</p>
<br>
For peole interested in the xiQ cameras : Ximea API/Gstreamer have
worked during more 24 hours without problem on my computer (Ubuntu
12.04, kernel 3.8, gstreamer 0.10).<br>
I run into trouble (i get a crash after more or less 2 hours) when i
tried to modify the code to get Gstreamer working with
v4l2sink/v4l2loopback/[pix_video], but my skill in C++ are to bad to
get things stable...<br>
++<br>
<br>
Jack<br>
<br>
<br>
<br>
Le 23/08/2013 12:17, Jack a écrit :<br>
<span style="white-space: pre;">></span><br>
<blockquote type="cite">Hello,<br>
<br>
Le 22/08/2013 21:03, IOhannes zmölnig a écrit :<br>
> On 08/22/2013 08:40 PM, Jack wrote:<br>
>><br>
>> $ cat /sys/devices/virtual/video4linux/video1/format<br>
>> GREY?30:1280x1024@30<br>
>><br>
>> I expect 60 fps.<br>
>> If i set :<br>
>> $ v4l2-ctl -d /dev/video1 -p 60<br>
>> or<br>
>> $ v4l2-ctl -d /dev/video1 -p 1<br>
>> It doesn't change anything.<br>
>> Do you know if there is a possibility to get this frame
rate (60 fps) ?<br>
>> Is it a limitation using videoloopback ?<br>
<br>
> no.<br>
> v4l2loopback does not know nor care about frames or formats.<br>
> it simply passes the frames from one application to another.
there is no<br>
> colorspace-conversion of resampling or the like involved.<br>
OK.<br>
<br>
<br>
<br>
> it's gstreamer that doesn't set the framerate correctly.<br>
<br>
> you could force it by running:<br>
> $ echo "@60" | sudo tee
/sys/devices/virtual/video4linux/video1/format<br>
<br>
> in practice i don't think that this framerate setting will do
much.<br>
Yes, it doesn't change anything.<br>
<br>
<br>
<br>
>> For info, i get 60 fps when I use the application
streamViewer.<br>
<br>
> how do you know?<br>
It is written in the top window border : "Acquisition [ cptured:
2854, skipped: 1, fps : 61.40 ]"<br>
Seeing the video capture in the Gem window, i guess it is at 60
fps.<br>
So, in this case, information about framerate return by :<br>
$ v4l2-ctl --all -d /dev/video1<br>
or<br>
$ cat /sys/devices/virtual/video4linux/video1/format<br>
is incorrect.<br>
Thank you for your help IOhannes, now I can get the stream from a
XIMEA camera in Gem.<br>
Do you think, it will be much better/faster/stable to get a v4l2
driver from XIMEA than to use a pipe with gstreamer/v4l2loopback ?<br>
++<br>
<br>
Jack<br>
<br>
<br>
<br>
<br>
> fdsmard<br>
> IOhannes<br>
<br>
<br>
<br>
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</blockquote>
<span style="white-space: pre;">><br>
><br>
><br>
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