FFMPEG did not work because I had deleted the references to opencv_core that are required this was not fixed by uninstalling and reinstalling FFMPEG and was solved after Ubuntu was reinstalled. In the end, I had several problems in my project. See OPENCV_SOURCE_CODE/3rdparty/ffmpeg/readme.Thanks SeijiSensei and monkeybrain, but my problem was somewhere else. Note FFmpeg is licensed under the GNU Lesser General Public License (LGPL) version 2.1 or later. To use FFMpeg at runtime, you must deploy the FFMepg binaries with your application. If you enable FFmpeg while configuring OpenCV than CMake will download and install the binaries in OPENCV_SOURCE_CODE/3rdparty/ffmpeg/.

FFMpeg is a complete, cross-reference solution. OpenCV can use the FFmpeg library ( ) as backend to record, convert and stream audio and video. If it so, it is possible to make a Mat header for memory buffer (user-allocated data) and process it in-place using OpenCV functions. Is common case that this libraries read/write images from/to a memory buffer. To get access to their devices, manufactures provide their own C++ API and library that you have to include and link with your OpenCV application. Thus you can't use VideoCapture or VideoWriter with these devices. Many industrial cameras or some video I/O devices don't provide standard driver interfaces for the operating system. ) or checking related switch in cmake-gui re-configure OpenCV using appropriates CMake switches (e.g.Cap.open(filename, cv::CAP_DSHOW) See also cv::VideoCapture::open(), cv::VideoCapture::VideoCapture() Enable backendsīackends are available only if they have been built with your OpenCV binaries.Ĭheck in opencv2/cvconfig.h to know which APIs are currently available (e.g.

Pencv python ffmpeg