htmlvideoelement

There are three main ways to draw images, from which you can clearly understand the role of each parameter drawImage (image, dx, dy) drawImage (image, sx, sy, sw, sh, dx, dy, dw, dh) drawImage (image, dx, dy, dw, dh) where the image parameter can be HTMLImageElement (im ...,. There are three main ways to draw images, from which you can clearly understand the role of each parameter DrawImage (image, dx, dy) DrawImage (image, sx, sy, sw, sh, dx, dy, dw, dh) DrawImage (image, dx, dy, dw, dh)Th

using pictures, graphic combinations and cropping ctx.globalAlpha = value; Sets the value of the graphics and image transparency before compositing to the canvas. The default is 1.0 (opaque). ctx.globalCompositeOperation = type; globalAlphaset how to draw graphics and images on existing bitmaps by applying Image-relatedSet the interaction between the picture and canvas, detailed instructions can refer to here: Canvas image PreservationDrawin

, sx, sy, sw, sh, dx, dy, dw, dh ); Demonstrate the meanings of parameters in the prototype:The image parameter can be HTMLImageElement, HTMLCanvasElement, or HTMLVideoElement. In the third method prototype, sx and sy are both 0 in the first two, and sw and sh are the width and height of the image; dw and dh in the second and third prototypes are the width and height of the image in the first one. The following example draws a remote image to the canv

Properties of the The code is as follows: src: Video propertiesPoster: Video cover, no picture displayed when playingPreload: Pre-loadAutoPlay: Auto PlayLoop: Looping PlaybackControls: Browser's own control barWidth: Video widthHeight: Video HeightHTML codeThe code is as follows: Both audio and video can get objects through JS, and JS gets the objects of video and audio via ID.Get the Video objectThe code is as follows:Media = document.getElementById ("media");Media Methods and properties:Both

1 Local video screenshot (CANVSA)　　　　2 cross-domain video screenshot　　Note: Add crossorigin= "*" to the video tagcrossorigin= "*"AutoPlay width= "720" height= ">src= "Http://jq22com.qiniudn.com/jq22-sp.mp4" />　　3 flv.js Realization Video Stream screenshotcrossorigin= "*"Width= "720" height= ">　　Summarize:1, Context.drawimage (image, 0, 0, canvas.width, canvas.height);The Context.drawimage method video here should be the image element that is drawn to the context. Allow any canvas image source (

end of the previous path. Two parameters are divided into X-and y-coordinate values that represent the starting point.void LineTo (x, y);Used to depict a straight path from the starting point to a specified position, and the drawing start point will be moved to that specified position when the paint is finished. The parameter represents the X-, y-coordinate value of the specified position.Draw a line by specifying where to start and where to end it:There are three three types of pictures to dra

HTML5 properties, methods, and events summary for the video tag Some time ago wrote a video player based on HTML5, from the beginning of not understanding it, and then to be able to write a basic perfect custom player. In this process, we have a comprehensive understanding of the properties, methods, and events of the video tag. The following categories are listed here. Properties of the SRC: Properties of the video Poster: Video cover, no picture displayed when

to "#000000", can be set to CSS color value, gradient object, or pattern object. FillStyle: The color of the fill. linewidth: line width. Unit px. LineCap: Line end style, butt none, round round head, Square Square head. lineJoin: Processing of line transitions, round fillet, bevel boxer, miter sharp corner. Miterlimit: Sharpness of sharp angle, default ten.Translate (x, y): Translation transformation, Origin moved to coordinates (x, y), rotate (a): rotation transform, rotation of a degree angl

audio and video can get objects through JS, and JS gets video and audio objects through id Get video object The Code is as follows: Media = document. getElementById ("media "); Media methods and attributes: Both HTMLVideoElement and HTMLAudioElement inherit from HTMLMediaElement The Code is as follows: Media. error; // null: normalMedia. error. code; // 1. User termination 2. network error 3. decoding error 4. Invalid URL// Network status -

Html5 video, html5 First, briefly describe the video Tag: Video: embed the video into the page 1. Declare the video tag Use src for a single video: Use the The browser will first identify whether Ogg format files are supported, if not, read the MPEG-4 file. You can also specify the encoding format as follows: 2. Video Format For the formats supported by different browsers, see Media formats supported by the audio and video elements: Create a page and run the code. You can see that the HTML5

Properties of the SRC: Properties of the video Poster: Video cover, no picture displayed when playing Preload: Pre-load AutoPlay: Auto Play Loop: Looping Playback Controls: Browser's own control bar Width: Video width Height: Video Height HTML code video id="media" src="http://www.sundxs.com/test.mp4" controls width="400px" heigt="400px">video> //audio和video都可以通过JS获取对象,JS通过id获取video和audio的对象Get the Video object document.getElementById("media"); Media Me