CLUVideoWriter

@interface CLUVideoWriter : NSObject <CLUWritable>

CLUVideoWriter class which responsible for all writing and saving process for video stream from device’s screen. Used with Video Module to record screen while report recording is active

  • Size of final video. Depends on recorded view size

    Declaration

    Objective-C

    @property (readonly, nonatomic) CGSize viewSize;

    Swift

    var viewSize: CGSize { get }

  • Current device’s screen scale. To generate bitmap with correct size depending on scale

    Declaration

    Objective-C

    @property (readonly, nonatomic) CGFloat scale;

    Swift

    var scale: CGFloat { get }

  • URL of the final video file where Video Writer will save final recorded file

    Declaration

    Objective-C

    @property (readonly, nonatomic) NSURL *outputURL;

    Swift

    var outputURL: URL! { get }

  • Create new instance of Video Writer with scpecific output URL, view size and scale

    Declaration

    Objective-C

    - (instancetype)initWithOutputURL:(NSURL *)outputURL
                         viewSize:(CGSize)size
                            scale:(CGFloat)scale;

    Swift

    init!(outputURL: URL!, viewSize size: CGSize, scale: CGFloat)

    Parameters

    outputURL

    URL of the final video file where Video Writer will save final recorded file
    size

    Size of final video. Depends on recorded view size
    scale

    Current device’s screen scale. To generate bitmap with correct size depending on scale

    Return Value

    New instance of Video Writer with configured properties

  • Append pixel buffer, current top view representation as a pixel buffer (See [UIView drawViewHierarchyInRect:afterScreenUpdates:] for drawing view Hierarchy on specific context) for specific timestamp

    See

    -bitmapContextForPixelBuffer:

    Declaration

    Objective-C

    - (BOOL)appendPixelBuffer:(CVPixelBufferRef)pixelBuffer
             forTimestamp:(CMTime)timestamp;

    Swift

    func append(_ pixelBuffer: CVPixelBuffer!, forTimestamp timestamp: CMTime) -> Bool

    Parameters

    pixelBuffer

    The CVPixelBufferRef to be appended.
    timestamp

    The presentation time for the pixel buffer to be appended.

    Return Value

    A BOOL value indicating success of appending the pixel buffer. If a result of NO is returned, clients can check the value of [CLUVideoWriter status] to determine whether the writing operation completed, failed, or was cancelled.

  • Declaration

    Objective-C

    - (AVAssetWriterStatus)status;

    Swift

    func status() -> AVAssetWriterStatus

    Return Value

    The status of writing samples to the receiver’s output file.

  • Create CGContextRef Bitmap context with correct width, height, color space and bytes per row for specific pixel buffer

    Declaration

    Objective-C

    - (CGContextRef)bitmapContextForPixelBuffer:(CVPixelBufferRef *)pixelBuffer;

    Swift

    func bitmapContext(for pixelBuffer: UnsafeMutablePointer

    Parameters

    pixelBuffer

    The empty CVPixelBufferRef

    Return Value

    CGContextRef Bitmap context on which client can draw view representation. (See [UIView drawViewHierarchyInRect:afterScreenUpdates:] to draw view on specific context)