Xtykutl

I need to add watermark to video but different oriented videos. Below codes are working for me when i add watermark to portrait video, but this code is not working for landscape videos, watermark become stressed.

 UIImage *myImage;

 myImage =[UIImage imageNamed:@"twinbitWaterMark"];

 CALayer *layerCa = [CALayer layer];

 layerCa.contents = (id)myImage.CGImage;



 float newX = videosize.width - imagesize.width;

float newY = videosize.height - imagesize.height;

layerCa.frame = CGRectMake(newX, newY, videosize.width*2, videosize.height*2);

layerCa.opacity = 1.0;

[layerCa setMasksToBounds:YES];



 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:layerCa];



composition.animationTool = [AVVideoCompositionCoreAnimationTool

                             videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];

Please help.

I think it is an mistake in your calculation:

Your watermark has landscape or watermark orientation.

By calculating the width and height

layerCa.frame = CGRectMake(newX, newY, videosize.width*2, videosize.height*2);



parentLayer.frame=CGRectMake(0, 0, videosize.width, videosize.height);

you are not preserving the original watermark ratio.

In landscape you have to calculate an offset left and right to your frame to preserve the ratio.

Before saving the file locally create a CATextLayer and attach it to the video. I believe this code will help you which I had written for one my application.

- (void)applyVideoEffectsToComposition:(AVMutableVideoComposition *)composition size:(CGSize)size

{

    NSArray *fieldsArray = overlayFieldsArray;

    // 1 - Set up the text layer

    CATextLayer *subtitle1Text = [[CATextLayer alloc] init];

    subtitle1Text.wrapped=YES;

    subtitle1Text.alignmentMode = kCAAlignmentLeft;

    [subtitle1Text setFont:@"Helvetica-Bold"];

    [subtitle1Text setFontSize:textSize];

    [subtitle1Text setFrame:CGRectMake(0, 0, size.width, fieldsArray.count*textSize+20) ];





    NSMutableString *layerText = [NSMutableString stringWithCapacity:0];



    for(NSDictionary *fieldDictionary in fieldsArray){



        [layerText appendFormat:@" %@ :",[[fieldDictionary allKeys] objectAtIndex:0]];



        [layerText appendFormat:@" %@ n",[_candidateDictionary valueForKey:[[fieldDictionary allValues] objectAtIndex:0]]];

    }





    [subtitle1Text setString:layerText];



    [subtitle1Text setForegroundColor:[[UIColor colorForText] CGColor]];



    // 2 - The usual overlay

    CALayer *overlayLayer = [CALayer layer];

    overlayLayer.backgroundColor = [UIColor colorForLayer].CGColor;

    overlayLayer.opacity=0.5f;

    CGSize maximumSize = CGSizeMake(600, 600);

    UIFont *myFont = [UIFont fontWithName:@"Helvetica" size:textSize];

    CGSize layerTextSize = [layerText sizeWithFont:myFont

                                 constrainedToSize:maximumSize

                                     lineBreakMode:UILineBreakModeWordWrap];

    overlayLayer.frame = CGRectMake(10, 0, layerTextSize.width*1.1, fieldsArray.count*textSize+20);

    [overlayLayer setMasksToBounds:YES];



    [overlayLayer addSublayer:subtitle1Text];



    CALayer *parentLayer = [CALayer layer];



    CALayer *videoLayer = [CALayer layer];

    videoLayer.frame = CGRectMake(0, 0, size.width, size.height);

    [parentLayer addSublayer:videoLayer];





    parentLayer.frame = CGRectMake(10, 0, layerTextSize.width*1.1, fieldsArray.count*textSize+20);

    [parentLayer addSublayer:overlayLayer];







    composition.animationTool = [AVVideoCompositionCoreAnimationTool

                                 videoCompositionCoreAnimationToolWithPostProcessingAsVideoLayer:videoLayer inLayer:parentLayer];



}

Some example project here https://github.com/rubygarage/media-watermark

MediaWatemark is an open source GPU/CPU-based iOS watermark library for overlays adding to images or video content. It has simple interface and straightforward functionality.

Please refer the web document :- https://rubygarage.org/blog/open-source-image-and-video-processing-library-for-ios