jmmanos/VideoToolboxPlus

VideoToolbox helpers with Swift syntax.

VideoToolboxPlus

VideoToolboxPlus is a collection of VideoToolbox helpers and extensions. It also adds some Swift-y syntax to the VideoToolbox API.

Getting Started

Simply add the VideoToolboxPlus.swift file to your project.

Usage

Turn code like this:

var session : VTCompressionSession? = nil

let status = VTCompressionSessionCreate( nil, 
  width, 
  height, 
  kCMVideoCodecType_H264, 
  nil, 
  attributes, 
  nil, 
  callback, 
  unsafeBitCast(self, to: UnsafeMutablePointer<Void>.self), 
  &session ) 

var properties: [NSString: NSObject] = [
    kVTCompressionPropertyKey_RealTime: kCFBooleanTrue,
    kVTCompressionPropertyKey_ProfileLevel: profileLevel,
    kVTCompressionPropertyKey_AverageBitRate: bitrate,
    kVTCompressionPropertyKey_MaxKeyFrameIntervalDuration: maxKeyFrameIntervalDuration
  ]
        
VTSessionSetProperties(_session!, properties)
VTCompressionSessionPrepareToEncodeFrames(_session!)

let imageBuffer : CVImageBuffer! = CMSampleBufferGetImageBuffer(sampleBuffer)

let status = VTCompressionSessionEncodeFrame(session, 
  imageBuffer, 
  presentationTimeStamp, 
  presentationDuration, 
  nil, 
  nil, 
  &flags)

if status == noErr {
  // handle error
} else {
  // handle success
}

Into:

var session : VTCompressionSession! = VTCompressionSession.new(width: width, 
  height: height, 
  codec: kCMVideoCodecType_H264, 
  callback: callback)

session.isRealtime = true
session.profile = profileLevel
session.averageBitrate = bitrate
session.maxKeyframeIntervalDuration = maxKeyframeIntervalDuration
        
session.prepare()

do {
  try session.encode(buffer: sampleBuffer)
} catch {
  // handle error
}
// handle success

License

VideoToolboxPlus is released under the MIT license.

Comments or Questions?

Any questions or comments should be made into issues, or pull requests if you want to write some code.