SPMAssetExporter

SDAVAssetExportSession

AVAssetExportSession drop-in replacement with customizable audio&video settings.

You want the ease of use of AVAssetExportSession but default provided presets doesn't fit your needs? You then began to read documentation for AVAssetWriter, AVAssetWriterInput, AVAssetReader, AVAssetReaderVideoCompositionOutput, AVAssetReaderAudioMixOutput… and you went out of aspirin? SDAVAssetExportSession is a rewrite of AVAssetExportSession on top of AVAssetReader* and AVAssetWriter*. Unlike AVAssetExportSession, you are not limited to a set of presets – you have full access over audio and video settings.

Usage Example

For ObjC:

SDAVAssetExportSession *encoder = [SDAVAssetExportSession.alloc initWithAsset:anAsset];
encoder.outputFileType = AVFileTypeMPEG4;
encoder.outputURL = outputFileURL;
encoder.videoSettings = @
  {
    AVVideoCodecKey: AVVideoCodecH264,
    AVVideoWidthKey: @1920,
    AVVideoHeightKey: @1080,
    AVVideoCompressionPropertiesKey: @
      {
        AVVideoAverageBitRateKey: @6000000,
        AVVideoProfileLevelKey: AVVideoProfileLevelH264High40,
      },
  };
encoder.audioSettings = @
{
  AVFormatIDKey: @(kAudioFormatMPEG4AAC),
  AVNumberOfChannelsKey: @2,
  AVSampleRateKey: @44100,
  AVEncoderBitRateKey: @128000,
};

[encoder exportAsynchronouslyWithCompletionHandler:^
{
  if (encoder.status == AVAssetExportSessionStatusCompleted)
  {
    NSLog(@"Video export succeeded");
  }
  else if (encoder.status == AVAssetExportSessionStatusCancelled)
  {
    NSLog(@"Video export cancelled");
  }
  else
  {
    NSLog(@"Video export failed with error: %@ (%d)", encoder.error.localizedDescription, encoder.error.code);
  }
}];

And for Swift:

let exporter = SDAVAssetExportSession(asset: asset)!
exporter.outputFileType = processingParameters.outputFileType.rawValue
exporter.outputURL = processingParameters.outputUrl
exporter.videoSettings = [
  AVVideoCodecKey: AVVideoCodecType.h264,
  AVVideoWidthKey: targetSize.width,
  AVVideoHeightKey: targetSize.height,
  AVVideoCompressionPropertiesKey: [AVVideoAverageBitRateKey: 1024_000,AVVideoProfileLevelKey: AVVideoProfileLevelH264High40]
]
exporter.audioSettings = [
  AVFormatIDKey: kAudioFormatMPEG4AAC,
  AVNumberOfChannelsKey: 1,
  AVSampleRateKey: 44100,
  AVEncoderBitRateKey: 96_000
]
exporter.videoComposition = videoComposition

exporter.exportAsynchronously(completionHandler: {
// do your work here
})

Licenses

All source code is licensed under the MIT-License.