如何使用AVFoundation在iOS中压缩视频 [英] How to compress video using AVFoundation in iOS

问题描述

iPhone中有任何压缩技术，使用AVfoundation压缩视频。

Is there are any compression technique in iPhone to compress video using AVfoundation. or any open source.

推荐答案

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+ (void)convertVideoToLowQualityWithInputURL:(NSURL*)inputURL outputURL:(NSURL*)outputURL successHandler:(void (^)())successHandler failureHandler:(void (^)(NSError *))failureHandler
{
    if([[NSFileManager defaultManager] fileExistsAtURL:outputURL]) [[NSFileManager defaultManager] removeItemAtURL:outputURL error:nil];
    AVURLAsset *asset = [AVURLAsset URLAssetWithURL:inputURL options:nil];
    AVAssetExportSession *exportSession = [[AVAssetExportSession alloc] initWithAsset:asset presetName:AVAssetExportPresetLowQuality];
    exportSession.outputURL = outputURL;
    exportSession.outputFileType = AVFileTypeQuickTimeMovie;
    [exportSession exportAsynchronouslyWithCompletionHandler: ^(void) {
        if (exportSession.status == AVAssetExportSessionStatusCompleted)
        {
            successHandler();
        }
        else
        {
            NSError *error = [NSError errorWithDomain:domain code:code userInfo:userInfo]; 
            failureHandler(error); 
        }
     }];
}

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