OpenCV VideoWriter无法打开 [英] OpenCV VideoWriter does not open

问题描述

运行带有OpenCV 2.4.8(预构建的二进制文件)的Windows 7，x64.

Running Windows 7, x64 with OpenCV 2.4.8 (pre-built binaries).

尝试以下基本代码:

VideoWriter wrt;
wrt.open("video.mp4",  -1, 29, Size(480, 640));

这什么都不做.选择编解码器的预期弹出窗口没有打开，或者编写器也没有打开(即，对wrt.isOpen()的调用返回false).另外，编写器类wrt.writer中的内部指针保持为空.

This does nothing. The expected popup for codec selection does not open, nor is the writer getting open (i.e. a call to wrt.isOpen() returns false). Also, the internal pointer inside the writer class wrt.writer remains null.

尝试:

1. 调试和发布OpenCV二进制文件.
2. 根据此将opencv_ffmpeg248.dll复制到可执行文件的目录中
3. 传递专用编解码器代码，例如CV_FOURCC('M','P','4','2')和其他代码.
4. 击中计算机.

1. Both Debug and Release OpenCV binaries.
2. Copying opencv_ffmpeg248.dll to the executable's directory according to this.
3. Passing exclusive codec codes such as CV_FOURCC('M','P','4','2') and others.
4. Hitting the computer.

没有任何效果.任何帮助/方向将不胜感激.

Nothing worked. Any help/direction would be appreciated..

推荐答案

尝试 VideoWriter wrt; wrt.open("video.avi", -1, 29, Size(480, 640));

Try VideoWriter wrt; wrt.open("video.avi", -1, 29, Size(480, 640));

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