I need programmatically way to perform fastest 'trans-wrap' of mov to mp4 on iPhone/iPad application

Posted by user1307877 on Stack Overflow See other posts from Stack Overflow or by user1307877
Published on 2012-04-02T11:25:45Z Indexed on 2012/04/02 11:30 UTC
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Filed under:

ios

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video

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containers

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mov

|

convert

I want to change the container of a .mov video files that I pick using UIImagePickerController and compressed them via AVAssetExportSession with AVAssetExportPresetMediumQuality and shouldOptimizeForNetworkUse = YES to .mp4 container.

I need programmatically way/sample code to perform a fastest 'trans-wrap' on iPhone/iPad application

I tried to set AVAssetExportSession.outputFileType property to AVFileTypeMPEG4 but it not supported and I got exception

I tried to do this transform using AVAssetWriter by specifying fileType:AVFileTypeMPEG4,

actually I got .mp4 output file, but it was not 'wrap-trans', the output file was 3x bigger than source, and the convert process took 128 sec for video with 60 sec duration.

I need solution that will run quickly and will keep the file size

please help

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