自己最近做一个项目，采用Opencv2.4.10+MFC处理，结果发现，在视频处理过程中，采用bool VideoCapture::set(int propId, double value)函数设置图像的分辨率，返回值为0，查看opencv2.4.10文档，是这样的

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propId– Property identifier. It can be one of the following:
– CV_CAP_PROP_POS_MSECCurrent position of the video file in milliseconds.
– CV_CAP_PROP_POS_FRAMES0-based index of the frame to be decoded/captured
next.
– CV_CAP_PROP_POS_AVI_RATIORelative position of the video file: 0 - start of the
film, 1 - end of the film.
– CV_CAP_PROP_FRAME_WIDTHWidth of the frames in the video stream.
– CV_CAP_PROP_FRAME_HEIGHTHeight of the frames in the video stream.
– CV_CAP_PROP_FPSFrame rate.
– CV_CAP_PROP_FOURCC4-character code of codec.
– CV_CAP_PROP_FRAME_COUNTNumber of frames in the video file.
– CV_CAP_PROP_FORMATFormat of the Mat objects returned by retrieve() .
– CV_CAP_PROP_MODEBackend-specific value indicating the current capture mode.
– CV_CAP_PROP_BRIGHTNESSBrightness of the p_w_picpath (only for cameras).
– CV_CAP_PROP_CONTRASTContrast of the p_w_picpath (only for cameras).
– CV_CAP_PROP_SATURATIONSaturation of the p_w_picpath (only for cameras).
– CV_CAP_PROP_HUEHue of the p_w_picpath (only for cameras).
– CV_CAP_PROP_GAINGain of the p_w_picpath (only for cameras).
– CV_CAP_PROP_EXPOSUREExposure (only for cameras).
– CV_CAP_PROP_CONVERT_RGBBoolean flags indicating whether p_w_picpaths should
be converted to RGB.
– CV_CAP_PROP_WHITE_BALANCECurrently unsupported
– CV_CAP_PROP_RECTIFICATIONRectification flag for stereo cameras (note: only
supported by DC1394 v 2.x backend currently)
value – Value of the property.

文档中并没有明确视频帧的宽度，高度仅仅适合摄像头或是视频，于是我用

CV_CAP_PROP_FRAME_WIDTH，CV_CAP_PROP_FRAME_HEIGHT设置视频帧的分辨率，结果

结果发现，设置无效，于是总结出目前的opencv版本不支持视频帧

分辨率设置。

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文章名称：关于opencv设置视频的属性无效问题-创新互联
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