怎麼自訂 Video 操作?自訂影片播放器?以下這篇文章跟大家介紹一下Angular 中自訂 Video 操作的方法,希望對大家有幫助!
上一篇文章是 Angular 專案實作權限控制。最近自己在網路上看到別人使用 vue
進行自訂 video
的操作。加上不久前實現了 angular
自訂 video
的相關需求, 遂來記錄一下,作為交流思考。 【相關教學推薦:《angular教學》】
#實作的功能如下:
<!-- app.component.html --> <div class="video-page"> <div class="video-tools"> <button nz-button nzType="primary" (click)="play('btn')" style="margin-right: 12px;">播放 ✅</button> <button nz-button nzType="primary" (click)="pause('btn')">暂停 ✅</button> <ng-container> <button nz-button nz-dropdown [nzDropdownMenu]="menuForward" nzPlacement="bottomCenter" style="margin: 0 12px;">快进 ✅</button> <nz-dropdown-menu #menuForward="nzDropdownMenu"> <ul nz-menu> <li nz-menu-item (click)="forwardSecond(10)">快进 10 s</li> <li nz-menu-item (click)="forwardSecond(20)">快进 20 s</li> </ul> </nz-dropdown-menu> </ng-container> <ng-container> <button nz-button nz-dropdown [nzDropdownMenu]="menuBack" nzPlacement="bottomCenter">快退 ✅</button> <nz-dropdown-menu #menuBack="nzDropdownMenu"> <ul nz-menu> <li nz-menu-item (click)="retreatSecond(10)">快退 10 s</li> <li nz-menu-item (click)="retreatSecond(20)">快退 20 s</li> </ul> </nz-dropdown-menu> </ng-container> <ng-container> <button nz-button nz-dropdown [nzDropdownMenu]="speedUp" nzPlacement="bottomCenter" style="margin: 0 12px;">倍速 ✅</button> <nz-dropdown-menu #speedUp="nzDropdownMenu"> <ul nz-menu> <li nz-menu-item (click)="speedUpVideo(1)">正常</li> <li nz-menu-item (click)="speedUpVideo(2)">2 倍</li> <li nz-menu-item (click)="speedUpVideo(4)">4 倍</li> </ul> </nz-dropdown-menu> </ng-container> <button nz-button nzType="primary" (click)="openOrCloseVoice()">声音开 / 声音关 ✅</button> <button nz-button nzType="primary" style="margin: 0 12px;" (click)="toFullScreen()">全屏 ✅</button> <br /> <button nz-button nzType="primary" style="margin-top: 12px;" (click)="entryInPicture()">进入画中画 ⚠️ 安卓平板不支持</button> <button nz-button nzType="primary" style="margin: 12px 12px 0 12px;" (click)="exitInPicture()">退出画中画 ⚠️ 安卓平板不支持</button> <br /> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 经过时长 / 总时长 : ✅ {{ currentTime }} / {{ totalTime }} </div> <!-- 进度条 --> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 进度条:✅ <div class="custom-video_control-bg" (mousedown)="handleProgressDown($event)" (mousemove)="handleProgressMove($event)" (mouseup)="handleProgressUp($event)" > <div class="custom-video_control-bg-outside" id="custom-video_control-bg-outside" > <span class="custom-video_control-bg-inside" id="custom-video_control-bg-inside" ></span> <span class="custom-video_control-bg-inside-point" id="custom-video_control-bg-inside-point" ></span> </div> </div> </div> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 声音条:✅ <div class="custom-video_control-voice"> <span class="custom-video_control-voice-play"> <i nz-icon nzType="sound" nzTheme="outline"></i> </span> <div class="custom-video_control-voice-bg" id="custom-video_control-voice-bg" (mousedown)="handleVolProgressDown($event)" (mousemove)="handleVolProgressMove($event)" (mouseup)="handleVolProgressUp($event)" > <div class="custom-video_control-voice-bg-outside" id="custom-video_control-voice-bg-outside" > <span class="custom-video_control-voice-bg-inside" id="custom-video_control-voice-bg-inside" ></span> <span class="custom-video_control-voice-bg-point" id="custom-video_control-voice-bg-point" ></span> </div> </div> </div> </div> </div> <div class="video-content"> <video id="video" class="video" style="width: 100%" poster="assets/poster.png"> <source type="video/mp4" src="assets/demo.mp4"> Sorry, your browser doesn't support. </video> </div> </div>
這裡使用了#播放/ 停止這裡直接呼叫angular ant design
,之前寫了一篇相關文章,還不熟悉的讀者可前往
Angular 結合NG-ZORRO 快速開發
video 物件的方法
play() 和
pause():
// app.component.ts // 播放按钮事件 play(flag: string | undefined) { if(flag) this.videoState.playState = true this.videoState.play = true this.video.play() } // 暂停按钮事件 pause(flag: string | undefined): void { if(flag) this.videoState.playState = false this.video.pause() this.videoState.play = false }這裡自訂的
play 和
pause 方法加上了一個標誌,對下下面要講的進度條的控制有幫助,上面的程式碼可以更加簡潔,讀者可以簡寫下。
快退,快轉和倍速設定了不同的選項,透過參數傳遞:
// app.component.ts // 快进指定的时间 forwardSecond(second: number): void { this.video.currentTime += second; // 定位到当前的播放时间 currentTime } // 后退指定的时间 retreatSecond(second: number): void { this.video.currentTime -= second } // 倍速 speedUpVideo(multiple: number): void { this.video.playbackRate = multiple; // 设定当前的倍速 playbackRate }聲音開/ 聲音關聲音的開關使用
video 的
muted 屬性即可:
// app.component.ts // 开或关声音 openOrCloseVoice(): void { this.video.muted = !this.video.muted; }進入全螢幕/ 退出全螢幕全螢幕的操作也是很簡單,使用
webkitRequestFullScreen
// app.component.ts // 全屏操作 toFullScreen(): void { this.video.webkitRequestFullScreen() }
全螢幕後,按進入畫中畫/ 退出畫中畫畫中畫相當於彈窗縮小影片~esc
可退出全螢幕
// app.component.ts // 进入画中画 entryInPicture(): void { this.video.requestPictureInPicture() this.video.style.display = "none" } // 退出画中画 exitInPicture(): void { if(this.document.pictureInPictureElement) { this.document.exitPictureInPicture() this.video.style.display = "block" } }設定
video 的樣式,是為了看起來不突兀...
// app.component.ts // 初始化 video 的相关的事件 initVideoData(): void { // 获取视频的总时长 this.video.addEventListener('loadedmetadata', () => { this.totalTime = this.formatTime(this.video.duration) }) // 监听时间发生更改 this.video.addEventListener('timeupdate', () => { this.currentTime = this.formatTime(this.video.currentTime) // 当前播放的时间 }) }
formatTime 是格式化函數播放進度條功能監聽滑鼠的
點擊,移動,放開的事件,將影片的播放時間和總事件相除,計算百分比。
// app.component.ts // 进度条鼠标按下 handleProgressDown(event: any): void { this.videoState.downState = true this.pause(undefined); this.videoState.distance = event.clientX + document.documentElement.scrollLeft - this.videoState.leftInit; } // 进度条 滚动条移动 handleProgressMove(event: any): void { if(!this.videoState.downState) return let distanceX = (event.clientX + document.documentElement.scrollLeft) - this.videoState.leftInit if(distanceX > this.processWidth) { // 容错处理 distanceX = this.processWidth; } if(distanceX < 0) { // 容错处理 distanceX = 0 } this.videoState.distance = distanceX this.video.currentTime = this.videoState.distance / this.processWidth * this.video.duration } // 进度条 鼠标抬起 handleProgressUp(event: any): void { this.videoState.downState = false // 视频播放 this.video.currentTime = this.videoState.distance / this.processWidth * this.video.duration this.currentTime = this.formatTime(this.video.currentTime) if(this.videoState.playState) { this.play(undefined) } }這裡需要計算進度條的位置,來取得點擊進度條的百分比,之後更新影片的目前播放時間。當然,我們還得有容錯處理,例如進度條為負數時候,目前播放時間為0。 聲音進度條我們實現了播放進度條的操作,對聲音進度條的實現就很容易上手了。聲音進度條也是監聽滑鼠的
點擊,移動,放開。不過,這次我們處理的是已知聲音 div 的高度。
// app.component.ts // 声音条 鼠标按下 handleVolProgressDown(event: any) { this.voiceState.topInit = this.getOffset(this.voiceProOut, undefined).top this.volProcessHeight = this.voiceProOut.clientHeight this.voiceState.downState = true //按下鼠标标志 this.voiceState.distance = this.volProcessHeight - (event.clientY + document.documentElement.scrollTop - this.voiceState.topInit) } // 声音 滚动条移动 handleVolProgressMove(event: any) { if(!this.voiceState.downState) return let disY = this.voiceState.topInit + this.volProcessHeight - (event.clientY + document.documentElement.scrollTop) if(disY > this.volProcessHeight - 2) { // 容错处理 disY = this.volProcessHeight - 2 } if(disY < 0) { // 容错处理 disY = 0 } this.voiceState.distance = disY this.video.volume = this.voiceState.distance / this.volProcessHeight this.videoOption.volume = Math.round(this.video.volume * 100) } // 声音 鼠标抬起 handleVolProgressUp(event: any) { this.voiceState.downState = false //按下鼠标标志 let voiceRate = this.voiceState.distance / this.volProcessHeight if(voiceRate > 1) { voiceRate = 1 } if(voiceRate < 0) { voiceRate = 0 } this.video.volume = voiceRate this.videoOption.volume = Math.round(this.video.volume * 100); // 赋值给视频声音 }如圖: 效果示範完成了上面的內容,我們以一個
gif 圖來展示效果:
全屏,聲音和畫中畫比較難截圖,Gif
上體現不來
詳細的程式碼,請前往 video-ng 取得。
【完】
更多程式相關知識,請造訪:程式設計入門! !
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