As we found out in #2613, opencv_ffmpeg340_64.dll is not copied over to the build/install folder, and causes all operations in OpenCV that use ffmpeg to sort-of "silently" fail. For example, reading from the camera or from video files doesn't work unless the file is manually copied.
As we found out in #2613,
opencv_ffmpeg340_64.dllis not copied over to the build/install folder, and causes all operations in OpenCV that use ffmpeg to sort-of "silently" fail. For example, reading from the camera or from video files doesn't work unless the file is manually copied.