Video.js 是一个具有大量功能的流行的视频和音频 JavaScript 库,今天我们试试集成到 Blazor .
Blazor VideoPlayer 视频播放器 组件
示例
https://blazor.app1.es/videoPlayers
1. 新建工程b13video
dotnet new blazorserver -o b13video
2. 将项目添加到解决方案中：
dotnet sln add b13video/b13video.csproj
3. Pages\_Host.cshtml 引用 video-js.css
<link href="//vjs.zencdn.net/7.10.2/video-js.min.css" rel="stylesheet">
4. 接下来，Pages\_Host.cshtml 引用 Video.js, 添加以下脚本文件到Pages\_Host.cshtml
<script src="https://vjs.zencdn.net/7.10.2/video.js"></script>
<script src="https://unpkg.com/video.js/dist/video.min.js"></script>
<script src="https://unpkg.com/@@videojs/http-streaming/dist/videojs-http-streaming.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/videojs-youtube/2.6.1/Youtube.min.js"></script>
5. 添加 app.js 文件到 wwwroot文件夹
文件内容
function loadPlayer(id, options) {
videojs(id, options);
}
6. Pages\_Host.cshtml 引用 app.js
<script src="./app.js"></script>
完整文件看起来应该是这样
@page "/"
@using Microsoft.AspNetCore.Components.Web
@namespace b13video.Pages
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<base href="~/" />
<link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
<link href="css/site.css" rel="stylesheet" />
<link href="b13video.styles.css" rel="stylesheet" />
<link rel="icon" type="image/png" href="favicon.png" />
<link href="//vjs.zencdn.net/7.10.2/video-js.min.css" rel="stylesheet">
<component type="typeof(HeadOutlet)" render-mode="ServerPrerendered" />
</head>
<body>
<component type="typeof(App)" render-mode="ServerPrerendered" />
<div id="blazor-error-ui">
<environment include="Staging,Production">
An error has occurred. This application may no longer respond until reloaded.
</environment>
<environment include="Development">
An unhandled exception has occurred. See browser dev tools for details.
</environment>
<a href="" class="reload">Reload</a>
<a class="dismiss">?</a>
</div>
<script src="_framework/blazor.server.js"></script>
<script src="https://unpkg.com/video.js/dist/video.min.js"></script>
<script src="https://unpkg.com/@@videojs/http-streaming/dist/videojs-http-streaming.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/videojs-youtube/2.6.1/Youtube.min.js"></script>
<script src="./app.js"></script>
</body>
</html>
7. Razor 页面, 我们直接在 Index.razor 里添加
<video id="my-player"
class="video-js"
controls
preload="auto"
poster="//vjs.zencdn.net/v/oceans.png"
data-setup='{}'>
<source src="//vjs.zencdn.net/v/oceans.mp4" type="video/mp4" />
<source src="//vjs.zencdn.net/v/oceans.webm" type="video/webm" />
<source src="//vjs.zencdn.net/v/oceans.ogv" type="video/ogg" />
<p class="vjs-no-js">
To view this video please enable JavaScript, and consider upgrading to a
web browser that
<a href="https://videojs.com/html5-video-support/" target="_blank">
supports HTML5 video
</a>
</p>
</video>
跑一下
8. 封装
取消几行html组件设定,改为c#提供参数, 最终代码如下
<video id="my-player"
class="video-js"
muted >
<p class="vjs-no-js">
To view this video please enable JavaScript, and consider upgrading to a
web browser that
@ -17,3 +14,27 @@
</a>
</p>
</video>
@inject IJSRuntime jsRuntime
@code{
protected override async Task OnAfterRenderAsync(bool firstRender)
{
if (firstRender)
{
await jsRuntime.InvokeVoidAsync("loadPlayer", "my-player", new
{
width = 600,
height = 300,
controls = true,
autoplay = true,
preload = "auto",
poster = "//vjs.zencdn.net/v/oceans.png",
sources = new[] {
new { type = "application/x-mpegURL", src = "https://d2zihajmogu5jn.cloudfront.net/bipbop-advanced/bipbop_16x9_variant.m3u8"},
new { type = "video/mp4", src = "//vjs.zencdn.net/v/oceans.mp4"}
}
});
}
}
}
调试一下,成功运行就进入下一步.
9. 组件化. {最终代码,请大家直接使用CV大法}
Pages\VideoPlayer.razor
@inject IJSRuntime jsRuntime
@namespace Blazor100.Components
<div @ref="element">
<video id="video_@Id"
class="video-js"
muted
webkit-playsinline
playsinline
x-webkit-airplay="allow"
x5-video-player-type="h5"
x5-video-player-fullscreen="true"
x5-video-orientation="portraint">
<p class="vjs-no-js">
To view this video please enable JavaScript, and consider upgrading to a
web browser that
<a href="https://videojs.com/html5-video-support/" target="_blank">
supports HTML5 video
</a>
</p>
</video>
@if (Debug)
{
<pre>@info</pre>
}
</div>
Pages\VideoPlayer.razor.cs
using b13video.Pages;
using Microsoft.AspNetCore.Components;
using Microsoft.Extensions.Options;
using Microsoft.JSInterop;
using System.Text.Json.Serialization;
using static System.Runtime.InteropServices.JavaScript.JSType;
namespace Blazor100.Components;
public partial class VideoPlayer : IAsyncDisposable
{
[Inject] IJSRuntime? JS { get; set; }
private IJSObjectReference? module;
private DotNetObjectReference<VideoPlayer>? instance { get; set; }
protected ElementReference element { get; set; }
private bool init;
private string? info;
private string Id { get; set; } = Guid.NewGuid().ToString();
/// <summary>
/// 资源类型
/// </summary>
[Parameter]
public string? SourcesType { get; set; }
/// <summary>
/// 资源地址
/// </summary>
[Parameter]
public string? SourcesUrl { get; set; }
[Parameter]
public int Width { get; set; } = 300;
[Parameter]
public int Height { get; set; } = 200;
[Parameter]
public bool Controls { get; set; } = true;
[Parameter]
public bool Autoplay { get; set; } = true;
[Parameter]
public string Preload { get; set; } = "auto";
/// <summary>
/// 设置封面
/// </summary>
[Parameter]
public string? Poster { get; set; }
[Parameter]
public VideoPlayerOption? Option { get; set; }
[Parameter]
public bool Debug { get; set; }
protected override async Task OnAfterRenderAsync(bool firstRender)
{
try
{
if (firstRender)
{
module = await JS!.InvokeAsync<IJSObjectReference>("import", "./app.js");
instance = DotNetObjectReference.Create(this);
Option = Option ?? new VideoPlayerOption()
{
Width = Width,
Height = Height,
Controls = Controls,
Autoplay = Autoplay,
Preload = Preload,
Poster = Poster,
//EnableSourceset= true,
//TechOrder= "['fakeYoutube', 'html5']"
};
Option.Sources.Add(new VideoSources(SourcesType, SourcesUrl));
try
{
await module.InvokeVoidAsync("loadPlayer", instance, "video_" + Id, Option);
}
catch (Exception e)
{
info = e.Message;
if (Debug) StateHasChanged();
Console.WriteLine(info);
if (OnError != null) await OnError.Invoke(info);
}
}
}
catch (Exception e)
{
if (OnError != null) await OnError.Invoke(e.Message);
}
}
async ValueTask IAsyncDisposable.DisposeAsync()
{
if (module is not null)
{
await module.InvokeVoidAsync("destroy", Id);
await module.DisposeAsync();
}
}
/// <summary>
/// 获得/设置 错误回调方法
/// </summary>
[Parameter]
public Func<string, Task>? OnError { get; set; }
/// <summary>
/// JS回调方法
/// </summary>
/// <param name="init"></param>
/// <returns></returns>
[JSInvokable]
public void GetInit(bool init) => this.init = init;
/// <summary>
/// JS回调方法
/// </summary>
/// <param name="error"></param>
/// <returns></returns>
[JSInvokable]
public async Task GetError(string error)
{
info = error;
if (Debug) StateHasChanged();
if (OnError != null) await OnError.Invoke(error);
}
}
Pages\VideoPlayerOption.cs
using System.Text.Json.Serialization;
namespace b13video.Pages
{
public class VideoPlayerOption
{
[JsonPropertyName("width")]
public int Width { get; set; } = 300;
[JsonPropertyName("height")]
public int Height { get; set; } = 200;
[JsonPropertyName("controls")]
public bool Controls { get; set; } = true;
[JsonPropertyName("autoplay")]
public bool Autoplay { get; set; } = true;
[JsonPropertyName("preload")]
public string Preload { get; set; } = "auto";
/// <summary>
/// 播放资源
/// </summary>
[JsonPropertyName("sources")]
public List<VideoSources> Sources { get; set; } = new List<VideoSources>();
/// <summary>
/// 设置封面
/// </summary>
[JsonPropertyName("poster")]
public string? Poster { get; set; }
//[JsonPropertyName("enableSourceset")]
//public bool EnableSourceset { get; set; }
//[JsonPropertyName("techOrder")]
//public string? TechOrder { get; set; } = "['html5', 'flash']";
}
/// <summary>
/// 播放资源
/// </summary>
public class VideoSources
{
public VideoSources() { }
public VideoSources(string? type, string? src)
{
this.Type = type ?? throw new ArgumentNullException(nameof(type));
this.Src = src ?? throw new ArgumentNullException(nameof(src));
}
/// <summary>
/// 资源类型<para></para>video/mp4<para></para>application/x-mpegURL<para></para>video/youtube
/// </summary>
[JsonPropertyName("type")]
public string Type { get; set; } = "application/x-mpegURL";
/// <summary>
/// 资源地址
/// </summary>
[JsonPropertyName("src")]
public string Src { get; set; } = "application/x-mpegURL";
}
}
wwwroot\app.js
var player = null;
export function loadPlayer(instance, id, options) {
console.log('player id', id);
player = videojs(id, options);
player.ready(function () {
console.log('player.ready');
var promise = player.play();
if (promise !== undefined) {
promise.then(function () {
console.log('Autoplay started!');
}).catch(function (error) {
console.log('Autoplay was prevented.', error);
instance.invokeMethodAsync('GetError', 'Autoplay was prevented.'+ error);
});
}
instance.invokeMethodAsync('GetInit', true);
});
return false;
}
export function destroy(id) {
if (undefined !== player && null !== player) {
player = null;
console.log('destroy');
}
}
10. 页面调用
<div class="row">
<div class="col-4">
<VideoPlayer SourcesType="application/x-mpegURL" SourcesUrl="https://d2zihajmogu5jn.cloudfront.net/bipbop-advanced/bipbop_16x9_variant.m3u8" Debug="true" />
</div>
<div class="col-4">
<VideoPlayer SourcesType="video/mp4" SourcesUrl="//vjs.zencdn.net/v/oceans.mp4" />
</div>
<div class="col-4">
<VideoPlayer SourcesType="application/x-mpegURL" SourcesUrl="https://test-streams.mux.dev/x36xhzz/x36xhzz.m3u8" />
</div>
</div>
项目源码
Github
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本作品采用 知识共享署名-非商业性使用-相同方式共享 4.0 国际许可协议 进行许可。欢迎转载、使用、重新发布，但务必保留文章署名AlexChow（包含链接： https://github.com/densen2014 ），不得用于商业目的，基于本文修改后的作品务必以相同的许可发布。如有任何疑问，请与我联系 。
AlexChow
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