AVCliper

WebCodecs-based, combine video, audio, images, text, with animation support
基于 WebCodecs 合成 视频、音频、图片、文字，支持动画

Basic Concepts 基础概念

- Combinator: add OffscreenSprite, output video stream
- Currently only supports outputting binary streams for MP4 format
- IClip: Abstract encapsulation of resources, reading (IClip.tick(time)) raw data of resources by time slice, has been implemented for the IClip interface with:
- MP4Clip, AudioClip, ImgClip, EmbedSubtitlesClip (embedded SRT subtitles), these are the types of resources supported by Combinator
- BaseSprite: An abstract representation of manipulable elements, attaching Rect information (position, width, height, layer, animation) to resources to make them controllable.
- OffscreenSprite: Wraps resources (IClip) and adds them to a Combinator for background offscreen video synthesis.
- AVCanvas: Includes VideoSprite, AudioSprite, ImgSprite, TextSprite to support user or program control over the positioning of drawn resources.

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- Combinator： 视频合成器，添加 OffscreenSprite， 输出视频流
- 目前仅支持输出 MP4 格式的二进制流
- IClip： 资源的抽象封装，按时间片段读取（IClip.tick(time)）资源的原始数据，IClip 接口的实现类有：
- MP4Clip, AudioClip, ImgClip, EmbedSubtitlesClip（内嵌 SRT 字幕），这些是合成视频所支持的资源类型
- BaseSprite 可操作元素的抽象，给资源附加 Rect（位置、宽高、层级、动画）信息，使得资源可被控制
- OffscreenSprite： 包装资源（IClip）添加到 Combinator，在后台离屏合成视频
- AVCanvas 包含了 VideoSprite, AudioSprite, ImgSprite, TextSprite，以支持用户或程序控制资源绘制的位置

DEMO