javascript - Geographic Information Systems Stack Exchange 流媒体服务有一项功能是抓图，也就是从正在播放的视频流中获取图片。. drawImage. 技术标签： drawImage canvas JS. The x-axis coordinate of the top left corner of the sub-rectangle of . Uncaught TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The provided value is not of type '(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)' 그리고 내 코드는 여기 있습니다; Javascript TypeError:无法执行'；drawImage'；在'；CanvasRenderingContext2D'； Failed to execute 'drawImage' on 'CanvasRenderingContext2D': The image argument is a canvas element with a width or height of 0. echarts 中使用中国地图 前台调试工具持续报错： Uncaught DOMException: Failed to execute 'drawImage' on . Despite not being exactly the same, another way to write that is 11/4. but, i am getting this error, when i am trying to run exportMap(): Uncaught TypeError: Failed to execute 'drawImage' on 'CanvasRenderingContext2D': No function was found that matched the signature provided. DOM向HTML中添加元素Failed to execute 'appendChild' on 'Node': parameter 1 is not of type 'Node'问题; TypeError: Failed to set the 'files' property on 'HTMLInputElement': The provided value is not of type 'FileList'. var image = new Image(); // see note on creating an image image.src = "imageURL"; image.onload = function(){ ctx.drawImage(this,0,0); } This is the Code If Anyone knows the ans. This is the Code If Anyone knows the ans. I am trying to this all without any libraries or framework. The drawImage that I've done is using an image from the local folder. 开启插件. CanvasRenderingContext2D.getImageData() - Web APIs | MDN The canvas is 1920x1080 in size, and then shrunk to fit using CSS (width:100%;). Uncaught DOMException: Failed to execute 'getImageData' on ... drawImage. The HTMLImageElement provided is in the 'broken' state.表明元素在获取过程中被中断了，也即元素可能 没有正确获取
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