base on This plugin generates thumbnail from video file or URL. It returns image in memory or writes into a file. It offers rich options to control the image format, resolution and quality. Supports iOS and Android. # video_thumbnail This plugin generates image thumbnails from video files or URLs on both Android and iOS. It returns an image in memory or saves it as a file with customizable format, resolution, and quality. [](https://pub.dev/packages/video_thumbnail) [](https://github.com/justsoft/)   ## Methods |function|parameter|description|return| |--|--|--|--| |thumbnailData|String `[video]`, optional Map<String, dynamic> `[headers]`, ImageFormat `[imageFormat]`(JPEG/PNG/WEBP), int `[maxHeight]`(0: for the original resolution of the video, or scaled by the source aspect ratio), [maxWidth]`(0: for the original resolution of the video, or scaled by the source aspect ratio), int `[timeMs]` generates the thumbnail from the frame around the specified millisecond, int `[quality]`(0-100)|generates thumbnail from `[video]`|`[Future<Uint8List>]`| |thumbnailFile|String `[video]`, optional Map<String, dynamic> `[headers]`, String `[thumbnailPath]`(folder or full path where to store the thumbnail file, null to save to same folder as the video file), ImageFormat `[imageFormat]`(JPEG/PNG/WEBP), int `[maxHeight]`(0: for the original resolution of the video, or scaled by the source aspect ratio), int `[maxWidth]`(0: for the original resolution of the video, or scaled by the source aspect ratio), int `[timeMs]` generates the thumbnail from the frame around the specified millisecond, int `[quality]`(0-100)|creates a file of the thumbnail from the `[video]` |`[Future<String>]`| Warning: > Giving both the `maxHeight` and `maxWidth` has different result on Android platform, it actually scales the thumbnail to the specified maxHeight and maxWidth. > To generate the thumbnail from a network resource, the `video` must be properly URL encoded. ## Usage **Installing** add [video_thumbnail](https://pub.dev/packages/video_thumbnail) as a dependency in your pubspec.yaml file. ```yaml dependencies: video_thumbnail: ^0.5.6 ``` **import** ```dart import 'package:video_thumbnail/video_thumbnail.dart'; ``` **Generate a thumbnail in memory from video file** ```dart final uint8list = await VideoThumbnail.thumbnailData( video: videofile.path, imageFormat: ImageFormat.JPEG, maxWidth: 128, // specify the width of the thumbnail, let the height auto-scaled to keep the source aspect ratio quality: 25, ); ``` **Generate a thumbnail file from video URL** ```dart final fileName = await VideoThumbnail.thumbnailFile( video: "https://flutter.github.io/assets-for-api-docs/assets/videos/butterfly.mp4", thumbnailPath: (await getTemporaryDirectory()).path, imageFormat: ImageFormat.WEBP, maxHeight: 64, // specify the height of the thumbnail, let the width auto-scaled to keep the source aspect ratio quality: 75, ); ``` **Generate a thumbnail file from video Assets declared in pubspec.yaml** ```dart final byteData = await rootBundle.load("assets/my_video.mp4"); Directory tempDir = await getTemporaryDirectory(); File tempVideo = File("${tempDir.path}/assets/my_video.mp4") ..createSync(recursive: true) ..writeAsBytesSync(byteData.buffer.asUint8List(byteData.offsetInBytes, byteData.lengthInBytes)); final fileName = await VideoThumbnail.thumbnailFile( video: tempVideo.path, thumbnailPath: (await getTemporaryDirectory()).path, imageFormat: ImageFormat.PNG, quality: 100, ); ``` ## Notes Fork or pull requests are always welcome. Currently it seems have a little performance issue while generating WebP thumbnail by using libwebp under iOS. ", Assign "at most 3 tags" to the expected json: {"id":"13000","tags":[]} "only from the tags list I provide: []" returns me the "expected json"