How to resize Video Frame / Crop Video Frame ?Please tell me

[NeerajBhakuni1410]

I have issue regarding Final Output video Frame size. I just want that 320 x 320 video frame size. Rest of them will get removed.

[xissburg]

What are you doing exactly? Do you want to crop the video? You can do that using AVFoundation http://stackoverflow.com/questions/5198245/how-do-i-use-avfoundation-to-crop-a-video

[NeerajBhakuni1410]

Actually that link does not crop the video, it just shrink the video frame.
I want to crop the Video , Just like Instagram and vine application did.

[xissburg]

You transform the video frame effectively cropping it. Just scale it up.

[NeerajBhakuni1410]

I am Using that code for merge all Video Clips. Can u Please Tell me What i have to do for crop the video frame from center with frame size 320 x 320.

Please Help me.
I really appreciate you.

• (AVMutableComposition* )mergeAllVideoClip:(NSArray* )videoFilePaths orientation:(NSNumber*)orientation
  {
  AVMutableComposition composition = [AVMutableComposition composition];

  AVMutableCompositionTrack* videoCompositionTrack = [composition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];

  AVMutableCompositionTrack* audioCompositionTrack = [composition addMutableTrackWithMediaType:AVMediaTypeAudio preferredTrackID:kCMPersistentTrackID_Invalid];

  // Make it square
  AVMutableVideoComposition* videoComposition = [AVMutableVideoComposition videoComposition];
  videoComposition.renderSize = CGSizeMake(320, 320);
  videoComposition.frameDuration = CMTimeMake(1, 30);

  AVMutableVideoCompositionInstruction *instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
  instruction.timeRange = CMTimeRangeMake(kCMTimeZero, CMTimeMakeWithSeconds(60, 30) );

  // Merge All Track.
  NSError* error = nil;
  NSMutableArray* timeVideoRanges = [NSMutableArray arrayWithCapacity:videoFilePaths.count];
  NSMutableArray* videoTracks = [NSMutableArray arrayWithCapacity:videoFilePaths.count];

  //audio files
  NSMutableArray* timeAudioRanges = [NSMutableArray arrayWithCapacity:videoFilePaths.count];
  NSMutableArray* audioTracks = [NSMutableArray arrayWithCapacity:videoFilePaths.count];

  NSDictionary *options = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithBool:YES], AVURLAssetPreferPreciseDurationAndTimingKey, nil];

  for (NSURL* videoPathUrl in videoFilePaths)
  {
  AVURLAsset *assetClip = [AVURLAsset URLAssetWithURL:videoPathUrl options:options];

  AVAssetTrack *clipVideoTrack = [[assetClip tracksWithMediaType:AVMediaTypeVideo] lastObject];
  AVAssetTrack *audioAssetTrack = [[assetClip tracksWithMediaType:AVMediaTypeAudio] lastObject];
  
  if (clipVideoTrack == nil || audioAssetTrack == nil)
      continue;
  
  // rotate to portrait
  AVMutableVideoCompositionLayerInstruction* compositionLayerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:clipVideoTrack];
  
  CGAffineTransform videoTransform = clipVideoTrack.preferredTransform;
  
  if(videoTransform.a == 0 && videoTransform.b == 1.0 && videoTransform.c == -1.0 && videoTransform.d == 0)  {
      DebugLog(@"right");
  
      *orientation = [NSNumber numberWithInteger:UIImageOrientationRight];
  
      CGAffineTransform rotationTransform = CGAffineTransformMakeRotation(M_PI_2);
      videoCompositionTrack.preferredTransform = rotationTransform;
  }
  if(videoTransform.a == 0 && videoTransform.b == -1.0 && videoTransform.c == 1.0 && videoTransform.d == 0)  {
      DebugLog(@"left");
  
      *orientation = [NSNumber numberWithInteger:UIImageOrientationLeft];
  }
  if(videoTransform.a == 1.0 && videoTransform.b == 0 && videoTransform.c == 0 && videoTransform.d == 1.0)   {
      DebugLog(@"up");
      *orientation = [NSNumber numberWithInteger:UIImageOrientationUp];
  }
  if(videoTransform.a == -1.0 && videoTransform.b == 0 && videoTransform.c == 0 && videoTransform.d == -1.0) {
      DebugLog(@"down");
      *orientation = [NSNumber numberWithInteger:UIImageOrientationDown];
  }
  
  
  instruction.layerInstructions = [NSArray arrayWithObject:compositionLayerInstruction];
  videoComposition.instructions = [NSArray arrayWithObject: instruction];
  
  // Merge Video Files
  [timeVideoRanges addObject:[NSValue valueWithCMTimeRange:CMTimeRangeMake(kCMTimeZero, assetClip.duration)]];
  [videoTracks addObject:clipVideoTrack];
  
  // Merge Audio Files
  [timeAudioRanges addObject:[NSValue valueWithCMTimeRange:CMTimeRangeMake(kCMTimeZero, assetClip.duration)]];
  [audioTracks addObject:audioAssetTrack];
  

  }

  BOOL compositionTrack = [videoCompositionTrack insertTimeRanges:timeVideoRanges ofTracks:videoTracks atTime:kCMTimeZero error:&error];
  DebugLog(@"compositionTrack :%d == error :%@",compositionTrack,error);

  BOOL audiocompositionTrack = [audioCompositionTrack insertTimeRanges:timeAudioRanges ofTracks:audioTracks atTime:kCMTimeZero error:&error];
  DebugLog(@"audiocompositionTrack :%d == error :%@",audiocompositionTrack,error);

  return composition;
  }

[NeerajBhakuni1410]

Can you tell me how to use CGAffineTransform for cropping the video from the center with frame size 320 x 320

CGAffineTransform finalTransform = // setup a transform that grows the video, effectively causing a crop
[transformer setTransform:finalTransform atTime:kCMTimeZero];

@xissburg Please Help.
Thanks

[antonyjoemathew]

@NeerajBhakuni1410 Hi I am also facing the same issue.Are you able to crop the image.? if so can you please share your code
Thanks