title: MOV to Mp4 video conversion iPhone programmatically
body: <p>I am developing media server for Play station 3 in iPhone.</p>
  
  <p>I came to know that PS3 doesn't support .MOV file so I have to convert it into Mp4 or something other transcode which PS3 support.</p>
  
  <p>This is what I have done but it crashes if I set different file type than its source files.</p>
  
  <pre><code>AVURLAsset *avAsset = [AVURLAsset URLAssetWithURL:videoURL options:nil];
  
  NSArray *compatiblePresets = [AVAssetExportSession exportPresetsCompatibleWithAsset:avAsset];
  
  if ([compatiblePresets containsObject:AVAssetExportPresetLowQuality])
  {
      AVAssetExportSession *exportSession = [[AVAssetExportSession alloc]initWithAsset:avAsset presetName:AVAssetExportPresetLowQuality];
  
      exportSession.outputURL = [NSURL fileURLWithPath:videoPath];
  
      exportSession.outputFileType = AVFileTypeMPEG4;
  
      CMTime start = CMTimeMakeWithSeconds(1.0, 600);
  
      CMTime duration = CMTimeMakeWithSeconds(3.0, 600);
  
      CMTimeRange range = CMTimeRangeMake(start, duration);
  
      exportSession.timeRange = range;
  
      [exportSession exportAsynchronouslyWithCompletionHandler:^{
  
          switch ([exportSession status]) {
  
              case AVAssetExportSessionStatusFailed:
                  NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
  
                  break;
  
              case AVAssetExportSessionStatusCancelled:
  
                  NSLog(@"Export canceled");
  
                  break;
  
              default:
  
                  break;
          }
  
          [exportSession release];
      }];
  }
  </code></pre>
  
  <p>If I set AVFileTypeMPEG4 here then it crashes, saying "Invalid file type".  So I have to set it to AVFileTypeQuickTimeMovie and it gives MOV file.</p>
  
  <p>Is it possible in iOS to convert video from MOV to Mp4 through AVAssetExportSession...OR without any Thirdparty libraries?</p>