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2016-08-11 10:53:09 -0600 | commented question | OpenCV 3.1 VideoCapture ffmpeg So for myself I change original source code of opencv, and recompile opencv project. I just swap code blocks as follow |
2016-08-11 09:47:15 -0600 | commented answer | Explicitly set ffmpeg to open video No, here I just provide more information about topic |
2016-08-11 00:19:18 -0600 | asked a question | OpenCV 3.1 VideoCapture ffmpeg Hello every one. I'm using opencv 3.1 how can I using ffmpeg explicity? does not work... so how to using apiPreference correctly? In my case, i get cap = IVideoCapture_create(filename) not empty and cvCreateFileCaptureWithPreference never invoke. Does it bug? Just in case, I open "ProcessExplorer" app and check what kind of dll was started with my application. There no any ffmpeg dll in list. Then I rename video file with non english words (some russians symbols) and after that string cap = IVideoCapture_create(filename) make empty, and program go to execute cvCreateFileCaptureWithPreference. I open "ProcessExplorer" and see now application using opencv_ffmpeg310_64.dll Also the video file has some kind of interlines capture, and after capture.read(mat) procedure, the height ot the output mat is half of original video frame (536 instead of 1072). When opencv_ffmpeg310_64.dll using I get original frame |
2016-08-11 00:16:36 -0600 | received badge | ● Editor (source) |
2016-08-11 00:06:23 -0600 | answered a question | Explicitly set ffmpeg to open video Hello every one. I'm using opencv 3.1 so how to using apiPreference correctly? In my case, i get cap = IVideoCapture_create(filename) not empty and cvCreateFileCaptureWithPreference never invoke. Does it bug? Just in case, I open "ProcessExplorer" app and check what kind of dll was started with my application. There no any ffmpeg dll in list. Then I rename video file with non english words (some russians symbols) and after that string cap = IVideoCapture_create(filename) make empty, and program go to execute cvCreateFileCaptureWithPreference. I open "ProcessExplorer" and see now application using opencv_ffmpeg310_64.dll Also the video file has some kind of interlines capture, and after capture.read(mat) procedure, the height ot the output mat is half of original video frame (536 instead of 1072). When opencv_ffmpeg310_64.dll using I get original frame |