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October 28, 2015 03:59
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| 视频读取 | |
| ==== | |
| NSFileManager.defaultManager().createFileAtPath(videoPath, contents: nil, attributes: nil) | |
| if let fileHander = NSFileHandle(forWritingAtPath: videoPath) { | |
| let BufferSize = 1024*1024 | |
| let buffer = calloc(BufferSize, sizeof(UInt8)) | |
| let bufferPtr8: UnsafeMutablePointer<UInt8> = UnsafeMutablePointer<UInt8>(buffer) | |
| var offset = Int64(0) | |
| var bytesRead = 0 | |
| repeat { | |
| bytesRead = representation.getBytes(bufferPtr8, fromOffset: offset, length: BufferSize, error: nil) | |
| let data = NSData(bytesNoCopy: bufferPtr8, length: bytesRead, freeWhenDone: false) | |
| fileHander.writeData(data) | |
| offset += bytesRead | |
| } while(bytesRead > 0) | |
| free(bufferPtr8) | |
| ===== | |
| 视频压缩 | |
| ==== | |
| let urlAsset = AVURLAsset(URL: representation.url()) | |
| let exportSession = AVAssetExportSession(asset: urlAsset, presetName: AVAssetExportPresetMediumQuality) | |
| exportSession?.outputURL = NSURL(fileURLWithPath: videoPath) | |
| exportSession?.outputFileType = AVFileTypeQuickTimeMovie | |
| exportSession?.exportAsynchronouslyWithCompletionHandler({ () -> Void in | |
| if exportSession?.status == .Completed { | |
| } | |
| }) |
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