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【iOS学习】视频添加动效水印步骤简介

yuyutoo 2025-01-12 19:56 1 浏览 0 评论

简概:

本次文章主要介绍给视频添加动效水印的几种方式，以及实现代码。
使用AVFoundation + CoreAnimation 合成方式
基于Lottie 核心也是 CoreAnimation ，这里我们也可以使用AVFoundation + Lottie 合成方式
我们同样可以使用序列帧资源或者gif资源来编写一段keyFrameAnination，这里我们就介绍一段 AVFoundation + Gif 合成方式
使用 GPUImageUIElement 将序列帧资源合并在目标资源上
使用 GPUImage 将水印视频合并在目标资源上
如果你有问题，或者对下述文字有任何意见与建议，可以在文章最后留言

视频处理后效果 GIF

原视频.gif

CoreAnimation.gif

Lottie.gif

GIF.gif

GPUImageType1.gif

GPUImageType2.gif

1.使用AVFoundation + CoreAnimation 合成方式

#pragma mark CorAnimation+ (void)addWaterMarkTypeWithCorAnimationAndInputVideoURL:(NSURL*)InputURL WithCompletionHandler:(void(^)(NSURL* outPutURL, intcode))handler{ NSDictionary *opts = [NSDictionary dictionaryWithObject:@(YES) forKey:AVURLAssetPreferPreciseDurationAndTimingKey]; AVAsset *videoAsset = [AVURLAsset URLAssetWithURL:InputURL options:opts]; AVMutableComposition *mixComposition = [[AVMutableComposition alloc] init]; AVMutableCompositionTrack *videoTrack = [mixComposition addMutableTrackWithMediaType:AVMediaTypeVideo

preferredTrackID:kCMPersistentTrackID_Invalid]; NSError *errorVideo = [NSError new]; AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject]; CMTime endTime = assetVideoTrack.asset.duration; BOOL bl = [videoTrack insertTimeRange:CMTimeRangeMake(kCMTimeZero, assetVideoTrack.asset.duration)

ofTrack:assetVideoTrack

atTime:kCMTimeZero error:&errorVideo];

videoTrack.preferredTransform = assetVideoTrack.preferredTransform; NSLog(@"errorVideo:%ld%d",errorVideo.code,bl); NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

formatter.dateFormat = @"yyyyMMddHHmmss"; NSString *outPutFileName = [formatter stringFromDate:[NSDate dateWithTimeIntervalSinceNow:0]]; NSString *myPathDocs = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.mov",outPutFileName]]; NSURL* outPutVideoUrl = [NSURL fileURLWithPath:myPathDocs];

CGSize videoSize = [videoTrack naturalSize];

UIFont *font = [UIFont systemFontOfSize:60.0]; CATextLayer *aLayer = [[CATextLayer alloc] init];

[aLayer setFontSize:60];

[aLayer setString:@"H"];

[aLayer setAlignmentMode:kCAAlignmentCenter];

[aLayer setForegroundColor:[[UIColor greenColor] CGColor]];

[aLayer setBackgroundColor:[UIColor clearColor].CGColor]; CGSize textSize = [@"H"sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];

[aLayer setFrame:CGRectMake(240, 470, textSize.width, textSize.height)];

aLayer.anchorPoint = CGPointMake(0.5, 1.0);

CATextLayer *bLayer = [[CATextLayer alloc] init];

[bLayer setFontSize:60];

[bLayer setString:@"E"];

[bLayer setAlignmentMode:kCAAlignmentCenter];

[bLayer setForegroundColor:[[UIColor greenColor] CGColor]];

[bLayer setBackgroundColor:[UIColor clearColor].CGColor]; CGSize textSizeb = [@"E"sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];

[bLayer setFrame:CGRectMake(240+ textSize.width, 470, textSizeb.width, textSizeb.height)];

bLayer.anchorPoint = CGPointMake(0.5, 1.0);

CATextLayer *cLayer = [[CATextLayer alloc] init];

[cLayer setFontSize:60];

[cLayer setString:@"L"];

[cLayer setAlignmentMode:kCAAlignmentCenter];

[cLayer setForegroundColor:[[UIColor greenColor] CGColor]];

[cLayer setBackgroundColor:[UIColor clearColor].CGColor]; CGSize textSizec = [@"L"sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];

[cLayer setFrame:CGRectMake(240+ textSizeb.width + textSize.width, 470, textSizec.width, textSizec.height)];

cLayer.anchorPoint = CGPointMake(0.5, 1.0);

CATextLayer *dLayer = [[CATextLayer alloc] init];

[dLayer setFontSize:60];

[dLayer setString:@"L"];

[dLayer setAlignmentMode:kCAAlignmentCenter];

[dLayer setForegroundColor:[[UIColor greenColor] CGColor]];

[dLayer setBackgroundColor:[UIColor clearColor].CGColor]; CGSize textSized = [@"L"sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];

[dLayer setFrame:CGRectMake(240+ textSizec.width+ textSizeb.width + textSize.width, 470, textSized.width, textSized.height)];

dLayer.anchorPoint = CGPointMake(0.5, 1.0);

CATextLayer *eLayer = [[CATextLayer alloc] init];

[eLayer setFontSize:60];

[eLayer setString:@"O"];

[eLayer setAlignmentMode:kCAAlignmentCenter];

[eLayer setForegroundColor:[[UIColor greenColor] CGColor]];

[eLayer setBackgroundColor:[UIColor clearColor].CGColor]; CGSize textSizede = [@"O"sizeWithAttributes:[NSDictionary dictionaryWithObjectsAndKeys:font,NSFontAttributeName, nil]];

[eLayer setFrame:CGRectMake(240+ textSized.width + textSizec.width+ textSizeb.width + textSize.width, 470, textSizede.width, textSizede.height)];

eLayer.anchorPoint = CGPointMake(0.5, 1.0); CABasicAnimation* basicAni = [CABasicAnimation animationWithKeyPath:@"transform.scale"];

basicAni.fromValue = @(0.2f);

basicAni.toValue = @(1.0f);

basicAni.beginTime = AVCoreAnimationBeginTimeAtZero;

basicAni.duration = 2.0f;

basicAni.repeatCount = HUGE_VALF;

basicAni.removedOnCompletion = NO;

basicAni.fillMode = kCAFillModeForwards;

[aLayer addAnimation:basicAni forKey:nil];

[bLayer addAnimation:basicAni forKey:nil];

[cLayer addAnimation:basicAni forKey:nil];

[dLayer addAnimation:basicAni forKey:nil];

[eLayer addAnimation:basicAni forKey:nil];

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];

[parentLayer addSublayer:bLayer];

[parentLayer addSublayer:cLayer];

[parentLayer addSublayer:dLayer];

[parentLayer addSublayer:eLayer]; AVMutableVideoComposition* videoComp = [AVMutableVideoComposition videoComposition];

videoComp.renderSize = videoSize;

parentLayer.geometryFlipped = true;

videoComp.frameDuration = CMTimeMake(1, 30);

videoComp.animationTool = [AVVideoCompositionCoreAnimationTool videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer]; AVMutableVideoCompositionInstruction* instruction = [AVMutableVideoCompositionInstruction videoCompositionInstruction];

instruction.timeRange = CMTimeRangeMake(kCMTimeZero, endTime); AVMutableVideoCompositionLayerInstruction* layerInstruction = [AVMutableVideoCompositionLayerInstruction videoCompositionLayerInstructionWithAssetTrack:videoTrack];

instruction.layerInstructions = [NSArray arrayWithObjects:layerInstruction, nil];

videoComp.instructions = [NSArray arrayWithObject: instruction];

AVAssetExportSession* exporter = [[AVAssetExportSession alloc] initWithAsset:mixComposition

presetName:AVAssetExportPresetHighestQuality];

exporter.outputURL=outPutVideoUrl;

exporter.outputFileType = AVFileTypeMPEG4;

exporter.shouldOptimizeForNetworkUse = YES;

exporter.videoComposition = videoComp;

[exporter exportAsynchronouslyWithCompletionHandler:^{ dispatch_async(dispatch_get_main_queue(), ^{ //这里是输出视频之后的操作，做你想做的

NSLog(@"输出视频地址:%@ andCode:%@",myPathDocs,exporter.error);

handler(outPutVideoUrl,(int)exporter.error.code);

});

}];

}

2.基于Lottie 核心也是 CoreAnimation ，这里我们也可以使用AVFoundation +Lottie 合成方式

与第一段代码不同的地方

LOTAnimationView* animation = [LOTAnimationView animationNamed:@"青蛙"];

animation.frame = CGRectMake(150, 340, 240, 240);

animation.animationSpeed = 5.0;

animation.loopAnimation = YES;

[animation play];

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:animation.layer];

3.我们同样可以使用序列帧资源或者gif资源来编写一段keyFrameAnination，这里我们就介绍一段 AVFoundation + Gif 合成方式

与第一段代码不同的地方是将gif 转成layer 的KEYFrameAnimation

CALayer *gifLayer1 = [[CALayer alloc] init];

gifLayer1.frame = CGRectMake(150, 340, 298, 253); CAKeyframeAnimation *gifLayer1Animation = [WatermarkEngine animationForGifWithURL:[[NSBundle mainBundle] URLForResource:@"雪人完成_1"withExtension:@"gif"]];

gifLayer1Animation.beginTime = AVCoreAnimationBeginTimeAtZero;

gifLayer1Animation.removedOnCompletion = NO;

[gifLayer1 addAnimation:gifLayer1Animation forKey:@"gif"];

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:gifLayer1];

+ (CAKeyframeAnimation *)animationForGifWithURL:(NSURL *)url {

CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"contents"];

NSMutableArray * frames = [NSMutableArray new]; NSMutableArray *delayTimes = [NSMutableArray new];

CGFloat totalTime = 0.0; CGFloat gifWidth; CGFloat gifHeight;

CGImageSourceRef gifSource = CGImageSourceCreateWithURL((CFURLRef)url, NULL);

// get frame count

size_t frameCount = CGImageSourceGetCount(gifSource); for(size_t i = 0; i < frameCount; ++i) { // get each frame

CGImageRef frame = CGImageSourceCreateImageAtIndex(gifSource, i, NULL);

[frames addObject:(__bridge id)frame]; CGImageRelease(frame);

// get gif info with each frame

NSDictionary *dict = (NSDictionary*)CFBridgingRelease(CGImageSourceCopyPropertiesAtIndex(gifSource, i, NULL)); NSLog(@"kCGImagePropertyGIFDictionary %@", [dict valueForKey:(NSString*)kCGImagePropertyGIFDictionary]);

// get gif size

gifWidth = [[dict valueForKey:(NSString*)kCGImagePropertyPixelWidth] floatValue];

gifHeight = [[dict valueForKey:(NSString*)kCGImagePropertyPixelHeight] floatValue];

// kCGImagePropertyGIFDictionary中kCGImagePropertyGIFDelayTime，kCGImagePropertyGIFUnclampedDelayTime值是一样的

NSDictionary *gifDict = [dict valueForKey:(NSString*)kCGImagePropertyGIFDictionary];

[delayTimes addObject:[gifDict valueForKey:(NSString*)kCGImagePropertyGIFUnclampedDelayTime]];

totalTime = totalTime + [[gifDict valueForKey:(NSString*)kCGImagePropertyGIFUnclampedDelayTime] floatValue];

// CFRelease((__bridge CFTypeRef)(dict));

} if(gifSource) { CFRelease(gifSource);

}

NSMutableArray *times = [NSMutableArray arrayWithCapacity:3]; CGFloat currentTime = 0; NSInteger count = delayTimes.count; for(inti = 0; i < count; ++i) {

[times addObject:[NSNumber numberWithFloat:(currentTime / totalTime)]];

currentTime += [[delayTimes objectAtIndex:i] floatValue];

}

NSMutableArray *images = [NSMutableArray arrayWithCapacity:3]; for(inti = 0; i < count; ++i) {

[images addObject:[frames objectAtIndex:i]];

}

animation.keyTimes = times;

animation.values = images;

animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];

animation.duration = totalTime;

animation.repeatCount = HUGE_VALF;

returnanimation;

}

4.使用 GPUImage 将水印视频合并在目标资源上

#pragma mark GPUImage TWO VIDEO INPUT+ (void)addWaterMarkTypeWithGPUImageAndInputVideoURL:(NSURL*)InputURL AndWaterMarkVideoURL:(NSURL*)InputURL2 WithCompletionHandler:(void(^)(NSURL* outPutURL, intcode))handler{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

GPUImageMovie* movieFile = [[GPUImageMovie alloc] initWithURL:InputURL];

GPUImageMovie* movieFile2 = [[GPUImageMovie alloc] initWithURL:InputURL2];

GPUImageScreenBlendFilter* filter = [[GPUImageScreenBlendFilter alloc] init];

[movieFile addTarget:filter];

[movieFile2 addTarget:filter];

GPUImageMovieWriter* movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:outPutVideoUrl size:CGSizeMake(540, 960) fileType:AVFileTypeQuickTimeMovie outputSettings: @

{ AVVideoCodecKey: AVVideoCodecH264, AVVideoWidthKey: @540, //Set your resolution width here

AVVideoHeightKey: @960, //set your resolution height here

AVVideoCompressionPropertiesKey: @

{ //2000*1000 建议800*1000-5000*1000

//AVVideoAverageBitRateKey: @2500000, // Give your bitrate here for lower size give low values

AVVideoAverageBitRateKey: @5000000, AVVideoProfileLevelKey: AVVideoProfileLevelH264HighAutoLevel, AVVideoAverageNonDroppableFrameRateKey: @30,

}

];

[filter addTarget:movieWriter]; AVAsset* videoAsset = [AVAsset assetWithURL:InputURL]; AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject];

movieWriter.transform = assetVideoTrack.preferredTransform; // [movie enableSynchronizedEncodingUsingMovieWriter:movieWriter];

[movieWriter startRecording];

[movieFile startProcessing];

[movieFile2 startProcessing];

[movieWriter setCompletionBlock:^{ dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"movieWriter Completion");

handler(outPutVideoUrl,1);

});

}];

}

5.使用 GPUImageUIElement 将序列帧资源合并在目标资源上

#pragma mark GPUImageUIElement+ (void)addWaterMarkTypeWithGPUImageUIElementAndInputVideoURL:(NSURL*)InputURL WithCompletionHandler:(void(^)(NSURL* outPutURL, intcode))handler{ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSDateFormatter *formatter = [[NSDateFormatter alloc] init];

GPUImageMovie* movieFile = [[GPUImageMovie alloc] initWithURL:InputURL];

NSValue *value = [NSValue valueWithCGRect:CGRectMake([UIScreen mainScreen].bounds.size.width/2.0- (332/2.0) , [UIScreen mainScreen].bounds.size.height/2.0- (297/2.0) , 332, 297)]; NSValue *value2 = [NSValue valueWithCGAffineTransform:CGAffineTransformMake(1, 0, 0, 1, 0, 0)]; UIView* view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];

GPUImageFilterGroup* filter = [WatermarkEngine addWatermarkWithResourcesNames:@[@"雨天青蛙"] Andframes:@[value] AndTransform:@[value2] AndLabelViews:@[view]];

[movieFile addTarget:filter];

GPUImageMovieWriter* movieWriter = [[GPUImageMovieWriter alloc] initWithMovieURL:outPutVideoUrl size:CGSizeMake(540, 960) fileType:AVFileTypeQuickTimeMovie outputSettings: @

{ AVVideoCodecKey: AVVideoCodecH264, AVVideoWidthKey: @540, //Set your resolution width here

AVVideoHeightKey: @960, //set your resolution height here

AVVideoCompressionPropertiesKey: @

{ //2000*1000 建议800*1000-5000*1000

//AVVideoAverageBitRateKey: @2500000, // Give your bitrate here for lower size give low values

AVVideoAverageBitRateKey: @5000000, AVVideoProfileLevelKey: AVVideoProfileLevelH264HighAutoLevel, AVVideoAverageNonDroppableFrameRateKey: @30,

}

];

[filter addTarget:movieWriter]; AVAsset* videoAsset = [AVAsset assetWithURL:InputURL]; AVAssetTrack *assetVideoTrack = [[videoAsset tracksWithMediaType:AVMediaTypeVideo]firstObject];

movieWriter.transform = assetVideoTrack.preferredTransform; // [movie enableSynchronizedEncodingUsingMovieWriter:movieWriter];

[movieWriter startRecording];

[movieFile startProcessing];

[movieWriter setCompletionBlock:^{ dispatch_async(dispatch_get_main_queue(), ^{ NSLog(@"movieWriter Completion");

handler(outPutVideoUrl,1);

});

}];

}

+ (GPUImageFilterGroup*) addWatermarkWithResourcesNames:(NSArray* )resourcesNames Andframes:(NSArray*)frams AndTransform:(NSArray*)transforms AndLabelViews:(NSArray*)labelViews{

__block intcurrentPicIndex = 0; CGFloat width = CGRectGetWidth([UIScreen mainScreen].bounds); UIView* temp = [[UIView alloc] initWithFrame:[UIScreen mainScreen].bounds];

[temp setContentScaleFactor:[[UIScreen mainScreen] scale]];

__block UIImageView* waterImageView1 = [[UIImageView alloc] init];

__block UIImageView* waterImageView2 = [[UIImageView alloc] init];

__block UIImageView* waterImageView3 = [[UIImageView alloc] init]; for(intindex = 0; index < resourcesNames.count ; index++) { if(index == 0) {

waterImageView1.frame = [frams[index] CGRectValue]; UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

waterImageView1.image = tempImage;

waterImageView1.transform = [transforms[index] CGAffineTransformValue];

[temp addSubview:waterImageView1];

[temp addSubview:labelViews[index]];

}elseif(index == 1){

waterImageView2.frame = [frams[index] CGRectValue]; UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

waterImageView2.image = tempImage;

waterImageView2.transform = [transforms[index] CGAffineTransformValue];

[temp addSubview:waterImageView2];

[temp addSubview:labelViews[index]];

}else{

waterImageView3.frame = [frams[index] CGRectValue]; UIImage* tempImage = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

waterImageView3.image = tempImage;

waterImageView3.transform = [transforms[index] CGAffineTransformValue];

[temp addSubview:waterImageView3];

[temp addSubview:labelViews[index]];

}

GPUImageFilterGroup* filterGroup = [[GPUImageFilterGroup alloc] init];

GPUImageUIElement *uiElement = [[GPUImageUIElement alloc] initWithView:temp];

GPUImageTwoInputFilter* blendFilter = [[GPUImageTwoInputFilter alloc] initWithFragmentShaderFromString:[WatermarkEngine loadShader:@"AlphaBlend_Normal"extension:@"frag"]];

GPUImageFilter* filter = [[GPUImageFilter alloc] init];

GPUImageFilter* uiFilter = [[GPUImageFilter alloc] init];

[uiElement addTarget:uiFilter];// [uiFilter setInputRotation:kGPUImageRotateLeft atIndex:0];

[filter addTarget:blendFilter];

[uiFilter addTarget:blendFilter];

[filterGroup addFilter:filter];

[filterGroup addFilter:uiFilter];

[filterGroup addFilter:blendFilter];

[filterGroup setInitialFilters:@[filter]];

[filterGroup setTerminalFilter:blendFilter]; // 71

// __unsafe_unretained typeof(self) this = self;

[filter setFrameProcessingCompletionBlock:^(GPUImageOutput * filter, CMTime frameTime) {

currentPicIndex += 1;

for(intindex = 0; index < resourcesNames.count ; index++) { if(index == 0) {

waterImageView1.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

}elseif(index == 1){

waterImageView2.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

}else{

waterImageView3.image = [UIImage imageWithContentsOfFile: [[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:@"%@_d",resourcesNames[index],currentPicIndex] ofType:@"png"]];

}

if(currentPicIndex == 89) {

currentPicIndex = 0;

}

[uiElement update];

}];

returnfilterGroup;

}

+ (NSString * _Nonnull)loadShader:(NSString *)name extension:(NSString *)extenstion { NSURL *url = [[NSBundle mainBundle] URLForResource:name withExtension:extenstion]; return[NSString stringWithContentsOfURL:url encoding:NSUTF8StringEncoding error:nil];

}

alphablend

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