comunicmobile/lib/utils/video_utils.dart

import 'dart:io';

import 'package:comunic/models/api_request.dart';
import 'package:comunic/utils/log_utils.dart';
import 'package:flutter/material.dart';
import 'package:path/path.dart' as path;
import 'package:path_provider/path_provider.dart';
import 'package:random_string/random_string.dart';
import 'package:video_thumbnail/video_thumbnail.dart';

/// Video utilities
///
/// @author Pierre Hubert

/// Generate a thumbnail for a video. In case of failure, return null
Future<BytesFile> generateVideoThumbnail({
  @required BytesFile videoFile,
  int maxWidth,
}) async {
  File file;

  try {
    final tempDir = await getTemporaryDirectory();
    if (tempDir == null) return null;
    file = File(path.join(tempDir.path, randomString(15, from: 65, to: 90)));

    await file.writeAsBytes(videoFile.bytes);

    return BytesFile(
      "thumb.png",
      await VideoThumbnail.thumbnailData(
          video: file.absolute.path, maxWidth: maxWidth),
    );
  } catch (e, s) {
    logError(e, s);
    return null;
  } finally {
    if (file != null && await file.exists()) await file.delete();
  }
}