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2013-03-25 15:55:19 -0600 | commented answer | VIDIOC_QBUF error causing webcam image tearing Hmm, I increased the wait time, but that does not appear to help the problem; even when I set it to a very high wait such as 500ms. Updating the drivers isn't really a possibility here, since I am using the Raspberry Pi and am rather new to its operation |
2013-03-25 15:20:11 -0600 | asked a question | VIDIOC_QBUF error causing webcam image tearing Hello everyone! I am trying to have a webcam stream video using OpenCV. I'm using the basic camera.py python code to access it. The image is generally very good, but there is frequently a frame in which there is image tearing. At the same time, I get an error in terminal: "VIDIOC_QBUF: Invalid argument". Additionally, on initial startup, I get about 5-15 errors stating: "VIDIOC_QUERYMENU: Invalid argument" The strangest part about this is that I may occasionally get an "Input/Output Error" in terminal. Once this occurs, the video streams perfectly with no more tearing. I am using the Logitech C270 Webcam on the Raspberry Pi. Using different resolutions does not help the problem. Code: |
2013-03-21 15:30:27 -0600 | asked a question | OpenCV cv2.Threshold TypeError Hello everyone! I'm running simple code to convert a colour image into a black-and-white image, but I receive an error when I use the cv2.threshold command: Am I missing something? Thanks! Code: |
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2013-02-13 23:44:59 -0600 | asked a question | OpenCV with Logitech Pro 4000 on the Raspberry Pi Hello everyone! I have been attempting to use OpenCV to take pictures on the Raspberry Pi (Raspbian), but it does not seem to work for me. Whenever I run any camera-related programs, the window opens correctly, but only a grey image is displayed. I have tested the webcam on my computer and it works fine. Additionally, the camera works with other, different webcam programs (Specifically, GuvCview). Here is the code I am currently using: Thank you for your help! |