Cv_fourcc Error
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Cv_fourcc Mp4
states, when I run the cv2.videowriter function I get 'module' object has no attribute CV_FOURCC. Code: # Creates a video file from webcam stream import cv2 Create test window cv2.namedWindow("cam_out", cv2.CV_WINDOW_AUTOSIZE) # Create vid cap object vid = cv2.VideoCapture(1) # Create video writer object vidwrite = cv2.VideoWriter(['testvideo', cv2.CV_FOURCC('M','J','P','G'), 25, (640,480),True]) python opencv share|improve this question edited Sep 30 at 10:07 JohnAllen 1,96342033 asked Mar 23 '13 at 7:56 user2197517 41112 cv2.videowriter example What is the question exactly? –Kyle Maxwell Mar 28 '13 at 4:19 add a comment| 3 Answers 3 active oldest votes up vote 17 down vote Kind of late to the party, but if anyone needs it for newer versions of opencv2, then the command is: cv2.VideoWriter_fourcc(c1, c2, c3, c4) share|improve this answer answered Feb 19 '14 at 1:22 cgf 1,20011629 1 It doesn't work for me, it's a quite unclear answer..... –G M Jul 14 at 11:06 add a comment| up vote 13 down vote Change cv2.CV_FOURCC('M','J','P','G') to cv2.cv.CV_FOURCC('M','J','P','G'). share|improve this answer edited Oct 14 '14 at 15:47 Rose Perrone 28k20136157 answered Apr 4 '13 at 15:06 armadefuego 1392 2 or even cv2.cv.CV_FOURCC(*'MJPG') –ntg Jan 10 '15 at 20:21 cv module is gone in latest version –hoju Jun 14 '15 at 8:48 3 These days you would use cv2.VideoWriter_fourcc(*'MJPG') –SiggyF Mar 25 at 11:46 add a comment| up vote 1 down vote For OpenCV 3 do this: cv2.VideoWriter_fourcc(*'MJPG') credit @SiffgyF share|improve this answer answered Sep 23 at 8:38 JohnAllen 1,96342033 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email P
nklatt 16 ●1 ●1 ●4 updated 2013-05-06 11:29:42 -0500 Howdy, I am using the VideoWriter class to capture video from a camera to a file. I am doing CV in the code as well, of course, but cv_fourcc opencv 3 am adding video capture to help troubleshoot and optimize. I am able to capture the
Videowriter::fourcc
video if I pass the magic number "-1" as the fourcc parameter, like so: outputVideo = new cv::VideoWriter(outputVideo_name, -1, 20, img_rgb.size(),
Cv_fourcc Python
true); I select "Microsoft Video 1" from the dropdown and it generates a video file using the CRAM codec. However, if I replace that "-1" with "CV_FOURCC('C','R','A','M')", it says it's capturing video but the file is http://stackoverflow.com/questions/15584608/python-opencv2-cv2-cv-fourcc-not-working-with-videowriterb always 6kB and does not play. Using MSVC or WHAM produces similar results. I am running on Windows 7 with a PS3 Eye camera using the CL-Eye driver and OpenCV 2.4.1, compiled with Eclipse and MinGW's g++ (GCC) 4.5.2. Any ideas on what I might be doing wrong? Thanks, Nathan ===== EDIT: Images showing binary differences between now-working and working generated video files: (Here there be zeros.) edit retag flag offensive close merge http://answers.opencv.org/question/12959/videowriter-fourcc-1-works-but-cv_fourcccram-does-not/ delete CommentsFOURCC supports a very large amount of codecs, but in my experience, aside from the major codecs, whether the codec actually works varies. In my experience, I just try the different codecs until one works. http://www.fourcc.org/codecs.php lists 'CRAM' as one of their supported codecs, but it also says that it is allegedly simialr to 'MSVC'. Another codec listed is 'WHAM'. Maybe give these a try?HD_Mouse( 2013-05-06 13:26:06 -0500 )editYeah, I did try those for that same reason but no joy. I used CRAM first since that is what is embedded in the working video file, as you can see in the first image - easier to see if you view it full-size.I also have the same result with IYUV which is a better-regarded codec but it's the same deal - it works if I select it from the dropdown but not if I direct VideoWriter to use that codec from the code.I feel like I must be doing something more basic wrong like improperly mixing C and C++ interfaces or something, maybe?nklatt( 2013-05-07 08:36:47 -0500 )editI think you can reduce this to your operating system not having the necessary codecs. Could you install a software package with the most random codecs inside, like VLC media player and see if it gets solved?StevenPuttemans( 2013-05-07 1
12:52:10 -0500 berak 12920 ●2 ●61 ●203 I am using http://answers.opencv.org/question/29816/cv_fourcc-was-not-declared-in-this-scope/ Opencv 3.0.0 dev on Ubuntu 12.04 and calling CV_FOURCC. http://answers.opencv.org/question/27902/how-to-record-video-using-opencv-and-python/ Did I miss any header file or the name of macro is changed in the latest version? I have using namespace cv already, and including opencv2/core/core.hpp> and opencv2/highgui/highgui.hpp. Some other macros are also missing such as CV_SORT_ASCENDING, CV_StsNotImplemented. edit fourcc python retag flag offensive close merge delete Commentsyes, all true. most constants in 3.0 lost the CV_ prefix and live instead in the cv:: namespace.also, the old CV_FOURCC macro was replaced by VideoWriter::fourcc()berak( 2014-03-11 12:51:02 -0500 )editadd a comment Login/Signup to Answer Question Tools Follow subscribe to rss feed Stats error: (-215) dst.data Asked: 2014-03-11 12:32:10 -0500 Seen: 1,677 times Last updated: Mar 11 '14 Related questions cannot import xfeatures2d in OpenCV 3- Python binding Running a Java Program Referencing OpenCV's Jar File CvMat vs cv::Mat data pointer Creating a sub array of a Mat throws assertion error v3.0 on linux: undefined reference to `cv::Mat:: OpenCV4Android 3 with extra modules for 32 and 64 bit OpenCV 3.1 VideoWriter::write(const Mat&) does not return its status. How do i run OpenCV programs using the Xeon Phi accelerators ? ShapeContext Java OpenCV 3.0.0 Tutorials for iOS deprecated Copyright Itseez, 2012-2016. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license. about | faq | help | privacy policy Powered by Askbot version 0.7.53 Please note: OpenCV answers requires javascript to work properly, please enable javascript in your browser, here is how ( 2016-10-06 04:09:31 -0500 )editnone
I have looked at OpenCV's Python example on how to use VideoCapture and VideoWriter to capture and write out a video file. But I keep getting: OpenCV Error: Assertion failed (dst.data == dst0.data) in cvCvtColor, file /tmp/opencv-n8PM/opencv-2.4.7.1/modules/imgproc/src/color.cpp, line 4422 Traceback (most recent call last): File "examples/observer/observer.py", line 17, in