{"action":"opened","issue":{"url":"https://api.github.com/repos/opencv/opencv/issues/9738","repository_url":"https://api.github.com/repos/opencv/opencv","labels_url":"https://api.github.com/repos/opencv/opencv/issues/9738/labels{/name}","comments_url":"https://api.github.com/repos/opencv/opencv/issues/9738/comments","events_url":"https://api.github.com/repos/opencv/opencv/issues/9738/events","html_url":"https://github.com/opencv/opencv/issues/9738","id":261200714,"number":9738,"title":"Setting CAP_PROP_EXPOSURE on VideoCapture does not change anything","user":{"login":"Arrowana","id":8245419,"avatar_url":"https://avatars0.githubusercontent.com/u/8245419?v=4","gravatar_id":"","url":"https://api.github.com/users/Arrowana","html_url":"https://github.com/Arrowana","followers_url":"https://api.github.com/users/Arrowana/followers","following_url":"https://api.github.com/users/Arrowana/following{/other_user}","gists_url":"https://api.github.com/users/Arrowana/gists{/gist_id}","starred_url":"https://api.github.com/users/Arrowana/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Arrowana/subscriptions","organizations_url":"https://api.github.com/users/Arrowana/orgs","repos_url":"https://api.github.com/users/Arrowana/repos","events_url":"https://api.github.com/users/Arrowana/events{/privacy}","received_events_url":"https://api.github.com/users/Arrowana/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-09-28T05:52:29Z","updated_at":"2017-09-28T05:52:29Z","closed_at":null,"author_association":"NONE","body":"\r\n##### System information (version)\r\n- OpenCV => 3.3.0\r\n- Operating System / Platform => Windows 10 Enterprise 64 Bit\r\n- Compiler => using opencv-python\r\n\r\n##### Detailed description\r\nSetting exposure is not working with the python wrapper for opencv, I don't know if this is related to the wrapper.\r\n\r\nI tried to set CAP_PROP_AUTO_EXPOSURE as well to disable any auto exposure.\r\n\r\nThe camera is a HD USB Camera USB8MP02G\r\nhttp://www.elpcctv.com/8mp-highdefinition-usb-camera-module-usb20-sony-imx179-color-cmos-sensor-75degree-lens-p-223.html\r\n\r\n##### Steps to reproduce\r\n\r\nI use this snippet to try to set the exposure to different values\r\n```\r\nimport cv2\r\n\r\ncap = cv2.VideoCapture(0)\r\ncap.set(cv2.CAP_PROP_AUTO_EXPOSURE, 0)\r\ncap.set(cv2.CAP_PROP_EXPOSURE, -7.0)\r\nprint(cap.get(cv2.CAP_PROP_EXPOSURE))\r\nwhile True:\r\n\tret, frame = cap.read()\r\n\tcv2.imshow('test', frame)\r\n\tcv2.waitKey(1)\r\n```\r\n\r\nI can't see any difference when changing exposure\r\n"}}
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