菜鸟学ffmpeg音视频技术之10 mac截图包含鼠标

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原创最新推荐文章于 2026-07-30 09:00:45 发布 386 阅读 AI 写同款· GEO 优化 ›

FFMPEG实战——配置踩过的坑最近用把ndk转到Android studio上来开发，在配置ffmpeg时着实遇到了不少坑，下面记录一下，以免以后在遇到类似问题。 1、首先是ffmpeg的编译so库 a、环境：我这里用的是ffmpeg3.3.9 ，ndk(r15c) 用的版本相对低一点，这便于遇到问题在网上可以找到解决方案。服务器：CenOs7 模拟器也可以，但... 阅读详情

前面介绍了mac截图和截屏，但是截出来的图片都不包含鼠标。

研究发现默认跟window一样，截图都不包含鼠标，如果需要鼠标，需要自己绘制上去。

下面介绍如何将鼠标绘制上去

1.获取鼠标图像

NSImage *overlay    =   [[[NSCursor arrowCursor] image] copy];

2.获取鼠标位置

    NSPoint mouseLoc;
    mouseLoc = [NSEvent mouseLocation]; //get cur

    int x = (int)mouseLoc.x;
    int y = (int)mouseLoc.y;
    int w = (int)[overlay size].width;
    int h = (int)[overlay size].height;
    int org_x = x;
    int org_y = y;

3.根据原图创建绘制上下文环境

    size_t height = CGImageGetHeight(pSourceImage);
    size_t width =  CGImageGetWidth(pSourceImage);
    int bytesPerRow = CGImageGetBytesPerRow(pSourceImage);

    unsigned int * imgData = (unsigned int*)malloc(height*bytesPerRow);

    // have the graphics context now,
    CGRect bgBoundingBox = CGRectMake (0, 0, width,height);

    CGContextRef context =  CGBitmapContextCreate(imgData, width,
                                                  height,
                                                  8, // 8 bits per component
                                                  bytesPerRow,
                                                  CGImageGetColorSpace(pSourceImage),
                                                  CGImageGetBitmapInfo(pSourceImage));

4.绘制

    // first draw the image
    CGContextDrawImage(context,bgBoundingBox,pSourceImage);

    // then mouse cursor
    CGContextDrawImage(context,CGRectMake(0, 0, width,height),pSourceImage);

    // then mouse cursor
    CGContextDrawImage(context,CGRectMake(org_x, org_y, w,h),[overlay CGImageForProposedRect: NULL context: NULL hints: NULL] );


    // assuming both the image has been drawn then create an Image Ref for that

    CGImageRef pFinalImage = CGBitmapContextCreateImage(context);

    CGContextRelease(context);

5.完整代码

CGImageRef drawMouseCursor(CGImageRef pSourceImage){
    // get the cursor image
    NSPoint mouseLoc;
    mouseLoc = [NSEvent mouseLocation]; //get cur

    //NSLog(@"Mouse location is x=%d,y=%d",(int)mouseLoc.x,(int)mouseLoc.y);

    // get the mouse image
    NSImage *overlay    =   [[[NSCursor arrowCursor] image] copy];

    //NSLog(@"Mouse location is x=%d,y=%d cursor width = %d, cursor height = %d",(int)mouseLoc.x,(int)mouseLoc.y,(int)[overlay size].width,(int)[overlay size].height);

    int x = (int)mouseLoc.x;
    int y = (int)mouseLoc.y;
    int w = (int)[overlay size].width;
    int h = (int)[overlay size].height;
    int org_x = x;
    int org_y = y;

    size_t height = CGImageGetHeight(pSourceImage);
    size_t width =  CGImageGetWidth(pSourceImage);
    int bytesPerRow = CGImageGetBytesPerRow(pSourceImage);

    unsigned int * imgData = (unsigned int*)malloc(height*bytesPerRow);

    // have the graphics context now,
    CGRect bgBoundingBox = CGRectMake (0, 0, width,height);

    CGContextRef context =  CGBitmapContextCreate(imgData, width,
                                                  height,
                                                  8, // 8 bits per component
                                                  bytesPerRow,
                                                  CGImageGetColorSpace(pSourceImage),
                                                  CGImageGetBitmapInfo(pSourceImage));

    // first draw the image
    CGContextDrawImage(context,bgBoundingBox,pSourceImage);

    // then mouse cursor
    CGContextDrawImage(context,CGRectMake(0, 0, width,height),pSourceImage);

    // then mouse cursor
    CGContextDrawImage(context,CGRectMake(org_x, org_y, w,h),[overlay CGImageForProposedRect: NULL context: NULL hints: NULL] );


    // assuming both the image has been drawn then create an Image Ref for that

    CGImageRef pFinalImage = CGBitmapContextCreateImage(context);

    CGContextRelease(context);

    return pFinalImage; /* to be released by the caller */
}

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