[JdeRobot] Mk802IV with Jderobot

[Andrés J Hernández Escobar]

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).

But I have tried a video, and although I don't have Hardware acceleration,
cameraview and cameraserver are working fine.

I don't know Jose if yours works with that fix.

But I can confirm that ICE works for the MK802IV (RK3188). I don't know if
the GK802 has the same hardware.


Andres.

2015-03-26 14:36 GMT+01:00 Oscar Garcia <oscar.robotica en linaresdigital.com>:

>  Hi Jose Antonio.
>
> Sorry for my late answer, I lost your message down my inbox.
>
>
> El 25/03/15 a las 20:23, Jose Antonio Fernandez escribió:
>
> I'm installing Ice in the same device but apply the patch you say Jderobot
> compile but cameraserver gives this error:
> VIDIOC_DQBUF: Invalid argument
> libv4l2: error dequeuing buf: Invalid argument
>
>
>
> This is not a opencv or ice error. As you can see is a video4linux (or
> module/driver) error.
>
>
>  I suppose that this patch is not enough at least to cameraserver
>
>
>
> The patch was enough, but there is a problem with your webcam and/or USB
> bus.
>
> Try the same fix that I told in another thread:
>
> sudo rmmod uvcvideo
> sudo modprobe uvcvideo nodrop=1
>
> If it is not enough then try this:
>
> sudo rmmod uvcvideo
> sudo modprobe uvcvideo timeout=10000 quirks=0x80 nodrop=1
>
> If it fixed your problem you can do them permanently with:
>
> echo "uvcvideo timeout=10000 quirks=0x80 nodrop=1" | sudo tee -a
> /etc/modprobe.d/jderobot_workarround.conf
>
> Almost all my problems with webcams in the GK802 and Raspberry was fixed
> with that line.
>
> Best regards.
>
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