VideoWriter Class Reference
[Media I/O]

VideoWriter constructors.

The constructors/functions initialize video writers. On Linux FFMPEG is used to write videos; on Windows FFMPEG or VFW is used; on MacOSX QTKit is used.

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Parameters:

filename	Name of the output video file.
fourcc	4-character code of codec used to compress the frames. For example, VideoWriter::fourcc('P','I','M','1') is a MPEG-1 codec, VideoWriter::fourcc('M','J','P','G') is a motion-jpeg codec etc. List of codes can be obtained at [Video Codecs by FOURCC](http://www.fourcc.org/codecs.php) page. FFMPEG backend with MP4 container natively uses other values as fourcc code: see [ObjectType](http://www.mp4ra.org/codecs.html), so you may receive a warning message from OpenCV about fourcc code conversion.
fps	Framerate of the created video stream.
frameSize	Size of the video frames.
isColor	If it is not zero, the encoder will expect and encode color frames, otherwise it will work with grayscale frames (the flag is currently supported on Windows only).

Concatenates 4 chars to a fourcc code.

This static method constructs the fourcc code of the codec to be used in the constructor VideoWriter::VideoWriter or VideoWriter::open.

Returns the specified VideoWriter property.

Parameters:

propId

Property identifier. It can be one of the following: **VIDEOWRITER_PROP_QUALITY** Current quality of the encoded videostream. **VIDEOWRITER_PROP_FRAMEBYTES** (Read-only) Size of just encoded video frame; note that the encoding order may be different from representation order. **VIDEOWRITER_PROP_NSTRIPES** Number of stripes for parallel encoding

Note:

When querying a property that is not supported by the backend used by the VideoWriter class, value 0 is returned.

Returns true if video writer has been successfully initialized.

Initializes or reinitializes video writer.

The method opens video writer. Parameters are the same as in the constructor VideoWriter::VideoWriter.

Closes the video writer.

The methods are automatically called by subsequent VideoWriter::open and by the VideoWriter destructor.

Sets a property in the VideoWriter.

Parameters:

propId	Property identifier. It can be one of the following: **VIDEOWRITER_PROP_QUALITY** Quality (0..100%) of the videostream encoded. Can be adjusted dynamically in some codecs. **VIDEOWRITER_PROP_NSTRIPES** Number of stripes for parallel encoding
value	Value of the property.

Writes the next video frame.

Parameters:

image

The written frame

The functions/methods write the specified image to video file. It must have the same size as has been specified when opening the video writer.