怎么自定義 Video 操作?自定義視頻播放器?下面本篇文章給大家介紹一下Angular 中自定義 Video 操作的方法,希望對大家有所幫助!
上一篇文章是 Angular 項目實現權限控制。最近自己在網上看到別人使用 vue
進行自定義 video
的操作。加上不久前實現了 angular
自定義 video
的相關需求, 遂來記錄一下,作為交流思考。
實現的功能如下:
播放 / 停止
快退 / 快進 / 倍速
聲音開 / 聲音關
進入全屏 / 退出全屏
進入畫中畫 / 退出畫中畫 【安卓平板不支持,不建議使用】
經過時長 / 總時長
播放進度條功能:支持點擊,拖拽進度
聲音進度條功能:支持點擊,拖拽進度
如圖:
下面我們來一一實現:
這里的重點不在布局,我們簡單來定義一下:
<!-- 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')">暫停 ?</button> <ng-container> <button nz-button nz-dropdown [nzDropdownMenu]="menuForward" nzPlacement="bottomCenter" style="margin: 0 12px;">快進 ?</button> <nz-dropdown-menu #menuForward="nzDropdownMenu"> <ul nz-menu> <li nz-menu-item (click)="forwardSecond(10)">快進 10 s</li> <li nz-menu-item (click)="forwardSecond(20)">快進 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()">聲音開 / 聲音關 ?</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()">進入畫中畫 ?? 安卓平板不支持</button> <button nz-button nzType="primary" style="margin: 12px 12px 0 12px;" (click)="exitInPicture()">退出畫中畫 ?? 安卓平板不支持</button> <br /> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 經過時長 / 總時長 : ? {{ currentTime }} / {{ totalTime }} </div> <!-- 進度條 --> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 進度條:? <div class="custom-video_control-bg" (mousedown)="handleProgressDown($event)" (mousemove)="handleProgressMove($event)" (mouseup)="handleProgressUp($event)" > <div class="custom-video_control-bg-outside" id="custom-video_control-bg-outside" > <span class="custom-video_control-bg-inside" id="custom-video_control-bg-inside" ></span> <span class="custom-video_control-bg-inside-point" id="custom-video_control-bg-inside-point" ></span> </div> </div> </div> <div style="display: flex; justify-content: flex-start; align-items: center; margin: 12px 0;"> 聲音條:? <div class="custom-video_control-voice"> <span class="custom-video_control-voice-play"> <i nz-icon nzType="sound" nzTheme="outline"></i> </span> <div class="custom-video_control-voice-bg" id="custom-video_control-voice-bg" (mousedown)="handleVolProgressDown($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>
播放 / 停止
這里直接調用 video
對象的方法 play()
和 pause()
:
// app.component.ts // 播放按鈕事件 play(flag: string | undefined) { if(flag) this.videoState.playState = true this.videoState.play = true this.video.play() } // 暫停按鈕事件 pause(flag: string | undefined): void { if(flag) this.videoState.playState = false this.video.pause() this.videoState.play = false }
這里自定義的 play
和 pause
方法加上了一個標志,對下下面要講的進度條的控制有幫助,上面的代碼可以更加簡潔,讀者可以簡寫下。
快退 / 快進 / 倍速
這里的快退,快進和倍速設置了不同的選項,通過參數進行傳遞:
// app.component.ts // 快進指定的時間 forwardSecond(second: number): void { this.video.currentTime += second; // 定位到當前的播放時間 currentTime } // 后退指定的時間 retreatSecond(second: number): void { this.video.currentTime -= second } // 倍速 speedUpVideo(multiple: number): void { this.video.playbackRate = multiple; // 設定當前的倍速 playbackRate }
聲音開 / 聲音關
聲音的開關使用 video
的 muted
屬性即可:
// app.component.ts // 開或關聲音 openOrCloseVoice(): void { this.video.muted = !this.video.muted; }
進入全屏 / 退出全屏
全屏的操作也是很簡單,使用 webkitRequestFullScreen
// app.component.ts // 全屏操作 toFullScreen(): void { this.video.webkitRequestFullScreen() }
全屏后,按 esc
可退出全屏
進入畫中畫 / 退出畫中畫
畫中畫相當于彈窗縮小視頻~
// app.component.ts // 進入畫中畫 entryInPicture(): void { this.video.requestPictureInPicture() this.video.style.display = "none" } // 退出畫中畫 exitInPicture(): void { if(this.document.pictureInPictureElement) { this.document.exitPictureInPicture() this.video.style.display = "block" } }
設置 video
的樣式,是為了看起來不突兀...
經過時長 / 總時長
記錄視頻的總時長和視頻當前的播放時長。我們已經來組件的時候就獲取視頻的元信息,得到總時長;在視頻播放的過程中,更新當前時長。
// app.component.ts // 初始化 video 的相關的事件 initVideoData(): void { // 獲取視頻的總時長 this.video.addEventListener('loadedmetadata', () => { this.totalTime = this.formatTime(this.video.duration) }) // 監聽時間發生更改 this.video.addEventListener('timeupdate', () => { this.currentTime = this.formatTime(this.video.currentTime) // 當前播放的時間 }) }
formatTime 是格式化函數
播放進度條功能
監聽鼠標的點擊,移動,松開的事件,對視頻的播放時間和總事件進行相除,計算百分比。
// app.component.ts // 進度條鼠標按下 handleProgressDown(event: any): void { this.videoState.downState = true this.pause(undefined); this.videoState.distance = event.clientX + document.documentElement.scrollLeft - this.videoState.leftInit; } // 進度條 滾動條移動 handleProgressMove(event: any): void { if(!this.videoState.downState) return let distanceX = (event.clientX + document.documentElement.scrollLeft) - this.videoState.leftInit if(distanceX > this.processWidth) { // 容錯處理 distanceX = this.processWidth; } if(distanceX < 0) { // 容錯處理 distanceX = 0 } this.videoState.distance = distanceX this.video.currentTime = this.videoState.distance / this.processWidth * this.video.duration } // 進度條 鼠標抬起 handleProgressUp(event: any): void { this.videoState.downState = false // 視頻播放 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) } }
這里需要計算進度條的位置,來獲取點擊進度條的百分比,之后更新視頻的當前播放時間。當然,我們還得有容錯處理,比如進度條為負數時候,當前播放時間為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鼠標的點擊,移動,松開。不過,這次我們處理的是已知聲音 div
的高度。
// app.component.ts // 聲音條 鼠標按下 handleVolProgressDown(event: any) { this.voiceState.topInit = this.getOffset(this.voiceProOut, undefined).top this.volProcessHeight = this.voiceProOut.clientHeight this.voiceState.downState = true //按下鼠標標志 this.voiceState.distance = this.volProcessHeight - (event.clientY + document.documentElement.scrollTop - this.voiceState.topInit) } // 聲音 滾動條移動 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) { // 容錯處理 disY = this.volProcessHeight - 2 } if(disY < 0) { // 容錯處理 disY = 0 } this.voiceState.distance = disY this.video.volume = this.voiceState.distance / this.volProcessHeight this.videoOption.volume = Math.round(this.video.volume * 100) } // 聲音 鼠標抬起 handleVolProgressUp(event: any) { this.voiceState.downState = false //按下鼠標標志 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); // 賦值給視頻聲音 }
如圖:
效果演示
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
詳細的代碼,請前往 video-ng 獲取。