中文文档

Backdrop

Transparent video animation is currently one of the more popular implementations of animation. Major manufacturers have also open sourced their own frameworks. In the end, we chose Tencent vap, which supports Android, IOS, and Web, and provides natural convenience for us to encapsulate flutter_vap. Provides a tool to generate a video with an alpha channel from a frame picture, which is simply awesome.

VAP(Video Animation Player)is developed by Penguin E-sports and is used to play cool animations.

  • Compared with Webp and Apng animation solutions, it has the advantages of high compression rate (smaller material) and hardware decoding (faster decoding)
  • Compared with Lottie, it can achieve more complex animation effects (such as particle effects)

Preview

image

video for youtube

video for qiniu

apk download

Setup

flutter_vap2: ${last_version}

How to use

import 'package:flutter_vap2/flutter_vap.dart';

VapViewController vapViewController;

IgnorePointer(
  // VapView can set the width and height through the outer package Container() to limit the width and height of the pop-up video
  child: VapView(
    onVapViewCreated: (controller) {
        vapViewController = controller;
    }
  ),
),
  1. Play local video
  import 'package:flutter_vap2/flutter_vap.dart';

  /// return: play error:       {"status": "failure", "errorMsg": ""}
  ///         play complete:    {"status": "complete"}
  Future<Map<dynamic, dynamic>> _playFile(String path) async {
    if (path == null) {
      return null;
    }
    var res = await vapViewController.playPath(path);
    if (res["status"] == "failure") {
      showToast(res["errorMsg"]);
    }
    return res;
  }
  1. Play asset video
  Future<Map<dynamic, dynamic>> _playAsset(String asset) async {
    if (asset == null) {
      return null;
    }
    var res = await vapViewController.playAsset(asset);
    if (res["status"] == "failure") {
      showToast(res["errorMsg"]);
    }
    return res;
  }
  1. Stop play
  VapController.stop()
  1. Queue play
  _queuePlay() async {。
    // Simultaneously call playback in multiple places, making the queue perform playback.
    QueueUtil.get("vapQueue").addTask(() => vapViewController.playPath(downloadPathList[0]));
    QueueUtil.get("vapQueue").addTask(() => vapViewController.playPath(downloadPathList[1]));
  }
  1. Cancel queue playback
  QueueUtil.get("vapQueue").cancelTask();

Example

github

Libraries

flutter_vap2
queue_util
vap_view