Yeah, I tried the Makefile in the classification example and it did not do 
anything.  I had to hunt around and found the examples originated the build 
in the common Makefile so I changed it there and it seems to work.  
I too have a Logitech C920.

Cheers,

Jon

On Friday, March 27, 2020 at 6:25:18 AM UTC-7, maste...@gmail.com wrote:
>
> That works! Thank you
> I tested out 5 webcams with both dummy.tidl and classificatin.tidl
> 1. Logitech C920 webcam works
> 2. VERY Old Creative VF0230 webcam - did not work
> 3. VERY Old trinket AMD Smarter Choice webcam -images torn up with 
> overread errors-n as n goes randomly from 1 to 8
> 4. OLD Silicon Motion SM731 webcam works
> 5. OLD EyeToy webcam  - occasional image tears
>
> check out https://elinux.org/RPi_USB_Webcams for some camera info.
>  
> I modified the common Makefile and it works. Just for curiosity I modified 
> the local Makefile as well and
> I's weird that the LOCAL Makefile is corrupted when I rebooted the board. 
> It came up with a dialog box asking if you want to reload file from disk 
> (that Makefile was modified in previous session and saved  "-r /dev/video1" 
> similar to the common Makefile) . If I clicked "Y" it showed the correct 
> mod -d/dev/video1, and if I clicked "no", it showed -d /dev/
>
>
> On Thursday, March 26, 2020 at 10:23:17 PM UTC-4, jonnymo wrote:
>>
>> In the GitHub issue that was filed, I noted the following which seems to 
>> get the camera active again:
>>
>>  
>>
>> Setting '-d /dev/video1' in the common Makefile seemed to do the trick. I 
>> now have video from the camera in the TIDL example.
>>
>> This is what I changed at line 170 in the Makefile at:
>> /var/lib/cloud9/common$
>>
>> else ifeq ($(PROC),tidl)
>>         ti-mct-heap-check -c
>>         sudo mjpg_streamer -i "input_opencv.so -d /dev/video1 -r 640x480 
>> --filter ./$(TARGET)$(EXE)" -o "output_http.so -p 8080 -w 
>> /usr/share/mjpg-streamer/www"
>> else
>>
>>
>>
>> On Thu, Mar 26, 2020 at 9:20 AM Robert Nelson <robert...@gmail.com> 
>> wrote:
>>
>>> On Thu, Mar 26, 2020 at 10:27 AM <maste...@gmail.com> wrote:
>>> >
>>> > Hi,
>>> > I just came across this post that is relevant to the same problem. I 
>>> just started working on this Beaglebone AI two days ago. I got the latest 
>>> os image and updates and upgrades everything. I tried 
>>> classification.tidl.cpp and I got the same last message that Jon Morss 
>>> got.  And your latest message was about /dev/video0. On my board I got 
>>> /dev/video0, /dev/video1 and it does recognize the camera. Do you mean that 
>>> I can fix it with the change to the default dev for the camera ? And where 
>>> can I change that? I worked with OpenCV and this VideoCapture::open() 
>>> failed message seems to indicate a wrong /dev/video index?
>>>
>>> Please submit a bug to:
>>>
>>> https://github.com/beagleboard/cloud9-examples
>>>
>>> the classification demo should allow you to specify a video offset..
>>>
>>> Regards,
>>>
>>> -- 
>>> Robert Nelson
>>> https://rcn-ee.com/
>>>
>>> -- 
>>> For more options, visit http://beagleboard.org/discuss
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>>> .
>>>
>>

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