适用于iOS的视频录制格式

Question

The functionality is to record a video from iPhone and upload it to server, then it should be synced with android device, and should be playable over there. From google search I came to know that iPhone records .mov files.

What I would like to know is, if there are any other formats available other than .mov so that it can be playable on android device as well as on the server.

Thanks.

SDK: 5.0;    
Xcode: 4.2;
Devices: iPhone 4,4S, iPad2,3

Answer 1

.mov isn't a format; it's a container file. The iPhone uses the popular h.264 encoder for video, and then contains it (with audio and data) in a .mov file, which is a quicktime file format. There is no way that you can change the container file or the encoder used by the iPhone.

There are services you can use to encoding video files from one format to another. Check out zencoder and pandastream.

Answer 2

There is a way indeed. You can use the class AVAssetExportSession . The AVAssetExportSession object has a property called outputFileType which you can set to AVFileTypeMPEG4 . By using the preset name AVAssetExportPresetPassthrough the video will not be actually re-encoded but just the container will be changed to mp4 (so it will be super fast).

AVAssetExportSession *exporter = [[AVAssetExportSession alloc] initWithAsset:#videoAsset# composition presetName:AVAssetExportPresetPassthrough];
exporter.outputFileType = AVFileTypeMPEG4;
exporter.outputURL = outputURL;

[exporter exportAsynchronouslyWithCompletionHandler:^(void){
    switch (exporter.status) {
        case AVAssetExportSessionStatusFailed:
            // Failed!
            break;
        case AVAssetExportSessionStatusCompleted:
            // Success!
            break;
        case AVAssetExportSessionStatusCancelled:
            // Cancelled!
            break;
    }
}];