關(guān)于opencv設(shè)置視頻的屬性無(wú)效問(wèn)題

自己最近做一個(gè)項(xiàng)目，采用Opencv2.4.10+MFC處理，結(jié)果發(fā)現(xiàn)，在視頻處理過(guò)程中，采用bool VideoCapture::set(int propId, double value)函數(shù)設(shè)置圖像的分辨率，返回值為0，查看opencv2.4.10文檔，是這樣的

propId – Property identifier. It can be one of the following:
– CV_CAP_PROP_POS_MSEC Current position of the video file in milliseconds.
– CV_CAP_PROP_POS_FRAMES 0-based index of the frame to be decoded/captured
next.
– CV_CAP_PROP_POS_AVI_RATIO Relative position of the video file: 0 - start of the
film, 1 - end of the film.
– CV_CAP_PROP_FRAME_WIDTH Width of the frames in the video stream.
– CV_CAP_PROP_FRAME_HEIGHT Height of the frames in the video stream.
– CV_CAP_PROP_FPS Frame rate.
– CV_CAP_PROP_FOURCC 4-character code of codec.
– CV_CAP_PROP_FRAME_COUNT Number of frames in the video file.
– CV_CAP_PROP_FORMAT Format of the Mat objects returned by retrieve() .
– CV_CAP_PROP_MODE Backend-specific value indicating the current capture mode.
– CV_CAP_PROP_BRIGHTNESS Brightness of the p_w_picpath (only for cameras).
– CV_CAP_PROP_CONTRAST Contrast of the p_w_picpath (only for cameras).
– CV_CAP_PROP_SATURATION Saturation of the p_w_picpath (only for cameras).
– CV_CAP_PROP_HUE Hue of the p_w_picpath (only for cameras).
– CV_CAP_PROP_GAIN Gain of the p_w_picpath (only for cameras).
– CV_CAP_PROP_EXPOSURE Exposure (only for cameras).
– CV_CAP_PROP_CONVERT_RGB Boolean flags indicating whether p_w_picpaths should
be converted to RGB.
– CV_CAP_PROP_WHITE_BALANCE Currently unsupported
– CV_CAP_PROP_RECTIFICATION Rectification flag for stereo cameras (note: only
supported by DC1394 v 2.x backend currently)
value – Value of the property.

文檔中并沒(méi)有明確視頻幀的寬度，高度僅僅適合攝像頭或是視頻，于是我用

CV_CAP_PROP_FRAME_WIDTH，CV_CAP_PROP_FRAME_HEIGHT設(shè)置視頻幀的分辨率，結(jié)果

結(jié)果發(fā)現(xiàn)，設(shè)置無(wú)效，于是總結(jié)出目前的opencv版本不支持視頻幀

分辨率設(shè)置。