[opencv]win10使用c++opencv合成视频

opencv 410,debug模式
方式1&＃xff1a;

VideoWriter output_video_writer(video_path_save, CAP_OPENCV_MJPEG,output_video_fps,video_sz);
//或者下面
VideoWriter output_video_writer;
output_video_writer.open(video_path_save, CAP_OPENCV_MJPEG, output_video_fps, video_sz);


报错信息&＃xff1a;

OpenCV: FFMPEG: tag 0x00000898/&＃39;???&＃39; is not found (format &＃39;mp4 / MP4 (MPEG-4 Part 14)&＃39;)&＃39;
[ INFO:0] VideoIO pluigin (GSTREAMER): glob is &＃39;opencv_videoio_gstreamer*.dll&＃39;, 1 location(s)
[ INFO:0] - E:\vspro\mysiam\trampolineTrack\output\debug: 0
[ INFO:0] Found 0 plugin(s) for GSTREAMER


方式2&＃xff1a;
https://docs.opencv.org/4.1.0/d7/d9e/tutorial_video_write.html

int ex &＃61; static_cast<int>(input_video.get(CAP_PROP_FOURCC));
VideoWriter output_video_writer;
output_video_writer.open(video_path_save, ex, output_video_fps, video_sz);


无报错信息&＃xff0c;运行正常

方法3&＃xff1a;

VideoWriter output_video_writer;
output_video_writer.open(video_path_save, output_video_writer.fourcc(&＃39;m&＃39;, &＃39;p&＃39;, &＃39;4&＃39;, &＃39;v&＃39;), output_video_fps, video_sz);


无报错信息&＃xff0c;运行正常