How to fix video orientation issue in iOS

Question

I am working with an app in which user picks video from Photos and uploads it to server. As my server is .Net server , the video gets rotated. I know the reason of problem i

Answer 1

Add this after the //VIDEO TRACK part

        //AUDIO TRACK
        AVMutableCompositionTrack *firstAudioTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];
        [firstAudioTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, firstAsset.duration) ofTrack:[[firstAsset tracksWithMediaType:AVMediaTypeAudio] objectAtIndex:0] atTime:kCMTimeZero error:nil];