Generate video thumbnails

lib/utils/video_utils.dart

@@ -0,0 +1,40 @@
+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();
+  }
+}