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- - (void) createWatermark:(UIImage*)image video:(NSURL*)videoURL
- {
- if (videoURL == nil)
- return;
- AVURLAsset* videoAsset = [[AVURLAsset alloc]initWithURL:videoURL options:nil];
- AVMutableComposition* mixComposition = [AVMutableComposition composition];
- AVMutableCompositionTrack* compositionVideoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo preferredTrackID:kCMPersistentTrackID_Invalid];
- AVAssetTrack* clipVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
- [compositionVideoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, videoAsset.duration)
- ofTrack:clipVideoTrack
- atTime:kCMTimeZero error:nil];
- [compositionVideoTrack setPreferredTransform:[[[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0] preferredTransform]];
- // create the layer with the watermark image
- CALayer* aLayer = [CALayer layer];
- aLayer.contents = (id)image.CGImage;
- aLayer.frame = CGRectMake(50, 100, image.size.width, image.size.height);
- aLayer.opacity = 0.9;
- //sorts the layer in proper order
- AVAssetTrack* videoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
- CGSize videoSize = [videoTrack naturalSize];
- CALayer *parentLayer = [CALayer layer];
- CALayer *videoLayer = [CALayer layer];
- parentLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
- videoLayer.frame = CGRectMake(0, 0, videoSize.width, videoSize.height);
- [parentLayer addSublayer:videoLayer];
- [parentLayer addSublayer:aLayer];
- // create text Layer
- CATextLayer* titleLayer = [CATextLayer layer];
- titleLayer.backgroundColor = [UIColor clearColor].CGColor;
- titleLayer.string = @"Dummy text";
- titleLayer.font = CFBridgingRetain(@"Helvetica");
- titleLayer.fontSize = 28;
- titleLayer.shadowOpacity = 0.5;
- titleLayer.alignmentMode = kCAAlignmentCenter;
- titleLayer.frame = CGRectMake(0, 50, videoSize.width, videoSize.height / 6);
- [parentLayer addSublayer:titleLayer];
- //create the composition and add the instructions to insert the layer:
- AVMutableVideoComposition* videoComp = [AVMutableVideoComposition videoComposition];
- videoComp.renderSize = videoSize;
- videoComp.frameDuration = CMTimeMake(1, 30);
- videoComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];
- /// instruction
- AVMutableVideoCompositionInstruction* instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];
- instruction.timeRange = CMTimeRangeMake(kCMTimeZero, [mixComposition duration]);
- AVAssetTrack* mixVideoTrack = [[mixComposition tracksWithMediaType:AVMediaTypeVideo] objectAtIndex:0];
- AVMutableVideoCompositionLayerInstruction* layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:mixVideoTrack];
- instruction.layerInstructions = [NSArray arrayWithObject:layerInstruction];
- videoComp.instructions = [NSArray arrayWithObject: instruction];
- // export video
- _assetExport = [[AVAssetExportSession alloc] initWithAsset:mixComposition presetName:AVAssetExportPresetMediumQuality];
- _assetExport.videoComposition = videoComp;
- NSLog (@"created exporter. supportedFileTypes: %@", _assetExport.supportedFileTypes);
- NSString* videoName = @"NewWatermarkedVideo.mov";
- NSString* exportPath = [NSTemporaryDirectory() stringByAppendingPathComponent:videoName];
- NSURL* exportUrl = [NSURL fileURLWithPath:exportPath];
- if ([[NSFileManager defaultManager] fileExistsAtPath:exportPath])
- [[NSFileManager defaultManager] removeItemAtPath:exportPath error:nil];
- _assetExport.outputFileType = AVFileTypeQuickTimeMovie;
- _assetExport.outputURL = exportUrl;
- _assetExport.shouldOptimizeForNetworkUse = YES;
- [_assetExport exportAsynchronouslyWithCompletionHandler:
- ^(void ) {
- //Final code here
- switch (_assetExport.status)
- {
- case AVAssetExportSessionStatusUnknown:
- NSLog(@"Unknown");
- break;
- case AVAssetExportSessionStatusWaiting:
- NSLog(@"Waiting");
- break;
- case AVAssetExportSessionStatusExporting:
- NSLog(@"Exporting");
- break;
- case AVAssetExportSessionStatusCompleted:
- NSLog(@"Created new water mark image");
- _playButton.hidden = NO;
- break;
- case AVAssetExportSessionStatusFailed:
- NSLog(@"Failed- %@", _assetExport.error);
- break;
- case AVAssetExportSessionStatusCancelled:
- NSLog(@"Cancelled");
- break;
- }
- }
- ];
- }
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