<div dir="ltr"><div><div><div><div>I have tried your solution Oscar, but it doesn't work on my MK802IV because it seems that my kernel doesn't have the module built. I'm researching a little bit to see if I can find it on the .config file (I have the source files).<br><br></div>But I have tried a video, and although I don't have Hardware acceleration, cameraview and cameraserver are working fine.<br><br></div>I don't know Jose if yours works with that fix.<br><br></div>But I can confirm that ICE works for the MK802IV (RK3188). I don't know if the GK802 has the same hardware.<br><br><br></div><div>Andres.</div></div><div class="gmail_extra"><br><div class="gmail_quote">2015-03-26 14:36 GMT+01:00 Oscar Garcia <span dir="ltr"><<a href="mailto:oscar.robotica@linaresdigital.com" target="_blank">oscar.robotica@linaresdigital.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000">
<div>Hi Jose Antonio.<br>
<br>
Sorry for my late answer, I lost your message down my inbox.<br>
<br>
<br>
El 25/03/15 a las 20:23, Jose Antonio Fernandez escribió:<br>
</div><span class="">
<blockquote type="cite">
<div dir="ltr">I'm installing Ice in the same device but apply the
patch you say Jderobot compile but cameraserver gives this
error:<br>
VIDIOC_DQBUF: Invalid argument<br>
libv4l2: error dequeuing buf: Invalid argument<br>
</div>
</blockquote>
<br>
<br></span>
This is not a opencv or ice error. As you can see is a video4linux
(or module/driver) error.<span class=""><br>
<br>
<br>
<blockquote type="cite">
<div dir="ltr">I suppose that this patch is not enough at least to
cameraserver<br>
</div>
</blockquote>
<br>
<br></span>
The patch was enough, but there is a problem with your webcam and/or
USB bus.<br>
<br>
Try the same fix that I told in another thread:<br>
<br>
sudo rmmod uvcvideo<br>
sudo modprobe uvcvideo nodrop=1<br>
<br>
If it is not enough then try this:<br>
<br>
sudo rmmod uvcvideo<br>
sudo modprobe uvcvideo timeout=10000 quirks=0x80 nodrop=1<br>
<br>
If it fixed your problem you can do them permanently with:<br>
<br>
echo "uvcvideo timeout=10000 quirks=0x80 nodrop=1" | sudo tee -a
/etc/modprobe.d/jderobot_workarround.conf<br>
<br>
Almost all my problems with webcams in the GK802 and Raspberry was
fixed with that line.<br>
<br>
Best regards.<br>
</div>
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