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@ -66,6 +66,16 @@ namespace cv |
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//! @{
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/** @brief Capture API backends.
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Select preferred API for a capture object. |
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To be used in the constructor VideoCapture::VideoCapture or VideoCapture::open |
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@note Backends are available only if they have been built with your OpenCV binaries.<br> |
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Check in <tt>cvconfig.h</tt> to know which APIs are currently available (e.g. <tt>HAVE_MSMF, HAVE_VFW, HAVE_LIBV4L</tt>). |
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To enable/disable APIs, you have to: |
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1. re-configure OpenCV using the appropriates CMake switches |
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(e.g. <tt>-DWITH_MSMF=ON -DWITH_VFW=ON ... </tt>) or checking related switch in cmake-gui |
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2. rebuild OpenCV itself |
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*/ |
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enum { CAP_ANY = 0, //!< Auto detect
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CAP_VFW = 200, //!< Video For Windows (platform native)
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@ -542,13 +552,13 @@ public: |
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img_%02d.jpg, which will read samples like img_00.jpg, img_01.jpg, img_02.jpg, ...) |
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@param apiPreference preferred Capture API to use. Can be used to enforce a specific reader |
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implementation if multiple are available: e.g. CAP_FFMPEG or CAP_IMAGES |
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implementation if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_IMAGES |
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*/ |
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CV_WRAP VideoCapture(const String& filename, int apiPreference); |
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/** @overload
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@param index = camera_id + domain_offset (CAP_*). id of the video capturing device to open. If there is a single |
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camera connected, just pass 0. Advanced Usage: to open Camera 1 using the MS Media Foundation API: index = 1 + CAP_MSMF |
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camera connected, just pass 0. Advanced Usage: to open Camera 1 using the MS Media Foundation API: index = 1 + cv::CAP_MSMF |
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*/ |
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CV_WRAP VideoCapture(int index); |
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@ -565,7 +575,7 @@ public: |
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/** @overload
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@param index = camera_id + domain_offset (CAP_*). id of the video capturing device to open. If there is a single |
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camera connected, just pass 0. Advanced Usage: to open Camera 1 using the MS Media Foundation API: index = 1 + CAP_MSMF |
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camera connected, just pass 0. Advanced Usage: to open Camera 1 using the MS Media Foundation API: index = 1 + cv::CAP_MSMF |
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*/ |
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CV_WRAP virtual bool open(int index); |
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@ -633,28 +643,26 @@ public: |
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/** @brief Sets a property in the VideoCapture.
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@param propId Property identifier. It can be one of the following: |
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- **CAP_PROP_POS_MSEC** Current position of the video file in milliseconds. |
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- **CAP_PROP_POS_FRAMES** 0-based index of the frame to be decoded/captured next. |
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- **CAP_PROP_POS_AVI_RATIO** Relative position of the video file: 0 - start of the |
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film, 1 - end of the film. |
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- **CAP_PROP_FRAME_WIDTH** Width of the frames in the video stream. |
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- **CAP_PROP_FRAME_HEIGHT** Height of the frames in the video stream. |
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- **CAP_PROP_FPS** Frame rate. |
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- **CAP_PROP_FOURCC** 4-character code of codec. |
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- **CAP_PROP_FRAME_COUNT** Number of frames in the video file. |
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- **CAP_PROP_FORMAT** Format of the Mat objects returned by retrieve() . |
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- **CAP_PROP_MODE** Backend-specific value indicating the current capture mode. |
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- **CAP_PROP_BRIGHTNESS** Brightness of the image (only for cameras). |
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- **CAP_PROP_CONTRAST** Contrast of the image (only for cameras). |
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- **CAP_PROP_SATURATION** Saturation of the image (only for cameras). |
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- **CAP_PROP_HUE** Hue of the image (only for cameras). |
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- **CAP_PROP_GAIN** Gain of the image (only for cameras). |
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- **CAP_PROP_EXPOSURE** Exposure (only for cameras). |
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- **CAP_PROP_CONVERT_RGB** Boolean flags indicating whether images should be converted |
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to RGB. |
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- **CAP_PROP_WHITE_BALANCE** Currently unsupported |
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- **CAP_PROP_RECTIFICATION** Rectification flag for stereo cameras (note: only supported |
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by DC1394 v 2.x backend currently) |
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- cv::CAP_PROP_POS_MSEC @copydoc cv::CAP_PROP_POS_MSEC |
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- cv::CAP_PROP_POS_FRAMES @copydoc CAP_PROP_POS_FRAMES |
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- cv::CAP_PROP_POS_AVI_RATIO @copydoc cv::CAP_PROP_POS_AVI_RATIO |
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- cv::CAP_PROP_FRAME_WIDTH @copydoc cv::CAP_PROP_FRAME_WIDTH |
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- cv::CAP_PROP_FRAME_HEIGHT @copydoc cv::CAP_PROP_FRAME_HEIGHT |
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- cv::CAP_PROP_FPS @copydoc cv::CAP_PROP_FPS |
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- cv::CAP_PROP_FOURCC @copydoc cv::CAP_PROP_FOURCC |
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- cv::CAP_PROP_FRAME_COUNT @copydoc cv::CAP_PROP_FRAME_COUNT |
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- cv::CAP_PROP_FORMAT @copydoc cv::CAP_PROP_FORMAT |
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- cv::CAP_PROP_MODE @copydoc cv::CAP_PROP_MODE |
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- cv::CAP_PROP_BRIGHTNESS @copydoc cv::CAP_PROP_BRIGHTNESS |
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- cv::CAP_PROP_CONTRAST @copydoc cv::CAP_PROP_CONTRAST |
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- cv::CAP_PROP_SATURATION @copydoc cv::CAP_PROP_SATURATION |
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- cv::CAP_PROP_HUE @copydoc cv::CAP_PROP_HUE |
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- cv::CAP_PROP_GAIN @copydoc cv::CAP_PROP_GAIN |
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- cv::CAP_PROP_EXPOSURE @copydoc cv::CAP_PROP_EXPOSURE |
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- cv::CAP_PROP_CONVERT_RGB @copydoc cv::CAP_PROP_CONVERT_RGB |
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- cv::CAP_PROP_WHITE_BALANCE_BLUE_U @copydoc cv::CAP_PROP_WHITE_BALANCE_BLUE_U |
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- cv::CAP_PROP_WHITE_BALANCE_RED_V @copydoc cv::CAP_PROP_WHITE_BALANCE_RED_V |
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- cv::CAP_PROP_RECTIFICATION @copydoc cv::CAP_PROP_RECTIFICATION |
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@param value Value of the property. |
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*/ |
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CV_WRAP virtual bool set(int propId, double value); |
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@ -662,29 +670,26 @@ public: |
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/** @brief Returns the specified VideoCapture property
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@param propId Property identifier. It can be one of the following: |
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- **CAP_PROP_POS_MSEC** Current position of the video file in milliseconds or video |
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capture timestamp. |
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- **CAP_PROP_POS_FRAMES** 0-based index of the frame to be decoded/captured next. |
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- **CAP_PROP_POS_AVI_RATIO** Relative position of the video file: 0 - start of the |
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film, 1 - end of the film. |
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- **CAP_PROP_FRAME_WIDTH** Width of the frames in the video stream. |
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- **CAP_PROP_FRAME_HEIGHT** Height of the frames in the video stream. |
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- **CAP_PROP_FPS** Frame rate. |
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- **CAP_PROP_FOURCC** 4-character code of codec. |
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- **CAP_PROP_FRAME_COUNT** Number of frames in the video file. |
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- **CAP_PROP_FORMAT** Format of the Mat objects returned by retrieve() . |
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- **CAP_PROP_MODE** Backend-specific value indicating the current capture mode. |
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- **CAP_PROP_BRIGHTNESS** Brightness of the image (only for cameras). |
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- **CAP_PROP_CONTRAST** Contrast of the image (only for cameras). |
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- **CAP_PROP_SATURATION** Saturation of the image (only for cameras). |
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- **CAP_PROP_HUE** Hue of the image (only for cameras). |
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- **CAP_PROP_GAIN** Gain of the image (only for cameras). |
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- **CAP_PROP_EXPOSURE** Exposure (only for cameras). |
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- **CAP_PROP_CONVERT_RGB** Boolean flags indicating whether images should be converted |
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to RGB. |
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- **CAP_PROP_WHITE_BALANCE** Currently not supported |
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- **CAP_PROP_RECTIFICATION** Rectification flag for stereo cameras (note: only supported |
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by DC1394 v 2.x backend currently) |
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- cv::CAP_PROP_POS_MSEC @copydoc cv::CAP_PROP_POS_MSEC |
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- cv::CAP_PROP_POS_FRAMES @copydoc CAP_PROP_POS_FRAMES |
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- cv::CAP_PROP_POS_AVI_RATIO @copydoc cv::CAP_PROP_POS_AVI_RATIO |
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- cv::CAP_PROP_FRAME_WIDTH @copydoc cv::CAP_PROP_FRAME_WIDTH |
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- cv::CAP_PROP_FRAME_HEIGHT @copydoc cv::CAP_PROP_FRAME_HEIGHT |
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- cv::CAP_PROP_FPS @copydoc cv::CAP_PROP_FPS |
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- cv::CAP_PROP_FOURCC @copydoc cv::CAP_PROP_FOURCC |
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- cv::CAP_PROP_FRAME_COUNT @copydoc cv::CAP_PROP_FRAME_COUNT |
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- cv::CAP_PROP_FORMAT @copydoc cv::CAP_PROP_FORMAT |
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- cv::CAP_PROP_MODE @copydoc cv::CAP_PROP_MODE |
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- cv::CAP_PROP_BRIGHTNESS @copydoc cv::CAP_PROP_BRIGHTNESS |
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- cv::CAP_PROP_CONTRAST @copydoc cv::CAP_PROP_CONTRAST |
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- cv::CAP_PROP_SATURATION @copydoc cv::CAP_PROP_SATURATION |
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- cv::CAP_PROP_HUE @copydoc cv::CAP_PROP_HUE |
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- cv::CAP_PROP_GAIN @copydoc cv::CAP_PROP_GAIN |
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- cv::CAP_PROP_EXPOSURE @copydoc cv::CAP_PROP_EXPOSURE |
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- cv::CAP_PROP_CONVERT_RGB @copydoc cv::CAP_PROP_CONVERT_RGB |
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- cv::CAP_PROP_WHITE_BALANCE_BLUE_U @copydoc cv::CAP_PROP_WHITE_BALANCE_BLUE_U |
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- cv::CAP_PROP_WHITE_BALANCE_RED_V @copydoc cv::CAP_PROP_WHITE_BALANCE_RED_V |
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- cv::CAP_PROP_RECTIFICATION @copydoc cv::CAP_PROP_RECTIFICATION |
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@note When querying a property that is not supported by the backend used by the VideoCapture |
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class, value 0 is returned. |
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@ -697,7 +702,7 @@ public: |
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img_%02d.jpg, which will read samples like img_00.jpg, img_01.jpg, img_02.jpg, ...) |
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@param apiPreference preferred Capture API to use. Can be used to enforce a specific reader |
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implementation if multiple are available: e.g. CAP_FFMPEG or CAP_IMAGES |
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implementation if multiple are available: e.g. cv::CAP_FFMPEG or cv::CAP_IMAGES |
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The methods first call VideoCapture::release to close the already opened file or camera. |
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*/ |
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@ -772,8 +777,8 @@ public: |
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/** @brief Sets a property in the VideoWriter.
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@param propId Property identifier. It can be one of the following: |
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- **VIDEOWRITER_PROP_QUALITY** Quality (0..100%) of the videostream encoded. Can be adjusted dynamically in some codecs. |
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- **VIDEOWRITER_PROP_NSTRIPES** Number of stripes for parallel encoding |
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- cv::VIDEOWRITER_PROP_QUALITY @copydoc cv::VIDEOWRITER_PROP_QUALITY |
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- cv::VIDEOWRITER_PROP_NSTRIPES @copydoc cv::VIDEOWRITER_PROP_NSTRIPES |
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@param value Value of the property. |
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*/ |
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CV_WRAP virtual bool set(int propId, double value); |
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@ -781,9 +786,9 @@ public: |
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/** @brief Returns the specified VideoWriter property
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@param propId Property identifier. It can be one of the following: |
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- **VIDEOWRITER_PROP_QUALITY** Current quality of the encoded videostream. |
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- **VIDEOWRITER_PROP_FRAMEBYTES** (Read-only) Size of just encoded video frame; note that the encoding order may be different from representation order. |
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- **VIDEOWRITER_PROP_NSTRIPES** Number of stripes for parallel encoding |
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- cv::VIDEOWRITER_PROP_QUALITY @copydoc cv::VIDEOWRITER_PROP_QUALITY |
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- cv::VIDEOWRITER_PROP_FRAMEBYTES @copydoc VIDEOWRITER_PROP_FRAMEBYTES |
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- cv::VIDEOWRITER_PROP_NSTRIPES @copydoc cv::VIDEOWRITER_PROP_NSTRIPES |
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@note When querying a property that is not supported by the backend used by the VideoWriter |
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class, value 0 is returned. |
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