- 1 year ago
OpenCV: VideoCapture Stalls on Windows
If you're experiencing stalls when using OpenCV's VideoCapture function on Windows, there are a few potential solutions you can try:
Update your OpenCV installation: Make sure you have the latest version of OpenCV installed on your system, as newer versions may have fixes for known issues that could be causing the stalls.
Disable hardware acceleration: Try disabling hardware acceleration in OpenCV by setting the
cv::CAP_DSHOW
propertycv::CAP_PROP_SETTINGS
to1
. This can be done with the following code:csscv::VideoCapture capture(0, cv::CAP_DSHOW);
capture.set(cv::CAP_PROP_SETTINGS, 1);
Set the video capture backend: Try changing the video capture backend used by OpenCV. You can do this by specifying a different value for the
backendId
parameter in thecv::VideoCapture
constructor. For example, you can try using thecv::CAP_DSHOW
backend instead of the defaultcv::CAP_ANY
backend:csscv::VideoCapture capture(0, cv::CAP_DSHOW);
Adjust video capture properties: Try adjusting video capture properties, such as resolution and frame rate, to find settings that work better with your hardware. You can set these properties using the
set
method of thecv::VideoCapture
object.csscv::VideoCapture capture(0);
capture.set(cv::CAP_PROP_FRAME_WIDTH, 640);
capture.set(cv::CAP_PROP_FRAME_HEIGHT, 480);
capture.set(cv::CAP_PROP_FPS, 30);
If none of these solutions work, you may need to investigate your hardware or operating system configuration for issues that could be causing the stalls.