bcm2835-v4l2 not working with Raspbian 7.8, Python 2.7.3 about pi HOT 5 OPEN

Replacing the SURF part.

When the program has not well finished, the v4l2 damaged, Causing not run the program later with my corrects. After reboot a couple of times finally i correct.

I had a little mistakes with threading, so I went out error v4l2. I could not find the error, because, when the program has not well finished, v4l2 could damage, Causing not run the program later with the correct code. After I reboot a couple of times, finally i correct the error.

The program runs very slow using the raspberry pi 1 model b, it has 3-4 second delay. And Without threading, only approximately 1 second delay.

from pi.

So your program errored out and did not close the camera input? Yes, I think I have seen such problems during development. You can try to avoid leaving the camera locked by using a python 'finally:' clause which ensures the camera is released.

Are you saying your own program is running very slowly or the standard one published here?

It has been a while since I made the multi-threaded performance measurements, which were published here:

https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=91269&p=789493&hilit=piter#p789493

but that was back in February. My original measurements did show that a single core Model B ran the multi-threaded version slightly slower. However, the slowdown was only 5-10% as I recall, not 3-4 times slower back then.

It is possible that later releases of Raspbian or OpenCV has made it run slower. I will try to make some time to repeat the measurements with the latest updates in place, but I can't promise when I will be able to get to it, sorry.

from pi.

Having set up all the hardware, I'm not reproducing your reported faults.

i'am using raspberry pi model B, with raspbian 7.8, Python 2.7.3, bcm2835-v4l2

Given my inability to reproduce, to help any further, I need:

• Output of uname -a
• Correct version of OpenCV (2.4.1 is old and unsupported?, 2.4.10, 2.4.11?)
• Output of v4l2-ctl --info

from pi.

I have v4l2 version 4.0.8, and i already install opencv2.4.10 but in virtual enviroment, and i'm taking problems with that. Exist other form to install opencv 2.4.10 on raspbian?. Or another new version

I fallow this guy: http://www.pyimagesearch.com/2015/02/23/install-opencv-and-python-on-your-raspberry-pi-2-and-b/#comment-338616

from pi.

Sorry, I don't know of any other way.

I'm going to take a look at upgrading the code to use OpenCV 3. However it may take me some time since I have a new day job that involves a lot of travelling.

from pi.