refactor(ui): replace thumblr with stream_thumbnail on desktop (#2948)

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: xsahil03x

melos.yaml

@@ -105,9 +105,12 @@ command:
       streaming_shared_preferences: ^2.0.0
       svg_icon_widget: ^0.0.1
       stream_core_flutter: ^0.5.1
-      stream_thumbnail: ^0.1.0
+      stream_thumbnail:
+        git:
+          url: https://github.com/GetStream/stream-core-flutter.git
+          ref: 2aea1413997af886ee951921d71e6b8cb8c5cfbb
+          path: packages/stream_thumbnail
       synchronized: ^3.4.0
-      thumblr: ^0.0.4
       url_launcher: ^6.3.2
       uuid: ^4.5.3
       video_player: ^2.11.1

packages/stream_chat_flutter/CHANGELOG.md

@@ -1,5 +1,12 @@
 ## Upcoming
 
+⚠️ Changed
+
+- Video thumbnails now use `stream_thumbnail` on every platform, and the `thumblr`
+  dependency is gone.
+- Linux builds now need the FFmpeg and libwebp development packages — on Debian/Ubuntu:
+  `libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libwebp-dev`.
+
 🐞 Fixed
 
 - Fixed `StreamAttachmentHandler` throwing `UnimplementedError` on WebAssembly builds.

packages/stream_chat_flutter/example/linux/flutter/generated_plugins.cmake

@@ -7,6 +7,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_linux
   record_linux
   sqlite3_flutter_libs
+  stream_thumbnail
   url_launcher_linux
 )
 

packages/stream_chat_flutter/example/windows/flutter/generated_plugins.cmake

@@ -10,7 +10,7 @@ list(APPEND FLUTTER_PLUGIN_LIST
   record_windows
   share_plus
   sqlite3_flutter_libs
-  thumblr_windows
+  stream_thumbnail
   url_launcher_windows
 )
 

packages/stream_chat_flutter/lib/src/video/video_service.dart

@@ -1,12 +1,7 @@
 import 'dart:async';
-import 'dart:ui' as ui;
 
 import 'package:flutter/services.dart';
 import 'package:stream_thumbnail/stream_thumbnail.dart';
-import 'package:thumblr/thumblr.dart' as thumblr;
-
-import '../../stream_chat_flutter.dart';
-import '../utils/device_segmentation.dart';
 
 ///
 // ignore: prefer-match-file-name
@@ -18,20 +13,18 @@ class _IVideoService {
 
   /// Generates a thumbnail image data in memory as UInt8List.
   ///
-  /// The video source can be a local video file or a URL.
-  ///
-  /// Thumbnails are not supported on Web at this time.
+  /// The video source can be a local video file or a URL, on every platform.
   ///
   /// If no [video] path is supplied, or if a thumbnail cannot be generated,
   /// returns [generatePlaceholderThumbnail]. A stock placeholder image.
   ///
-  /// For desktop, you can specify the position of the video to generate
-  /// the thumbnail.
+  /// Use [timeMs] to pick the frame, and [maxHeight]/[maxWidth] to bound the
+  /// size or `0` to keep the source resolution. A lower [quality] reduces
+  /// image quality, but it gets ignored for PNG format.
   ///
-  /// For mobile, you can specify the maximum height or width for the thumbnail
-  /// or 0 for same resolution as the original video. The lower quality value
-  /// creates lower quality of the thumbnail image, but it gets ignored for
-  /// PNG format.
+  /// [headers] are sent when fetching a remote video, except on Windows, which
+  /// cannot attach them. Windows also has no WebP encoder, so
+  /// [StreamThumbnailFormat.webp] fails there.
   Future<Uint8List?> generateVideoThumbnail({
     String? video,
     Map<String, String>? headers,
@@ -45,22 +38,6 @@ class _IVideoService {
     if (video == null) return generatePlaceholderThumbnail();
 
     try {
-      // If the device is a desktop, use thumblr to generate the thumbnail.
-      if (isDesktopDevice) {
-        final thumbnail = await thumblr.generateThumbnail(filePath: video);
-        final byteData = await thumbnail.image.toByteData(
-          format: ui.ImageByteFormat.png,
-        );
-
-        final bytesList = byteData?.buffer.asUint8List();
-        if (bytesList != null && bytesList.isNotEmpty) {
-          return bytesList;
-        }
-
-        return await generatePlaceholderThumbnail();
-      }
-
-      // Otherwise, use the stream_thumbnail plugin to generate the thumbnail.
       return await StreamThumbnail.thumbnailData(
         video: video,
         headers: headers,

packages/stream_chat_flutter/pubspec.yaml

@@ -56,11 +56,22 @@ dependencies:
   shimmer: ^3.0.0
   stream_chat_flutter_core: ^10.4.0
   stream_core_flutter: ^0.5.1
-  stream_thumbnail: ^0.1.0
+  stream_thumbnail:
+    # The ignore below silences `invalid_dependency` because we occasionally
+    # pin stream_thumbnail to a git ref to iterate on it alongside this
+    # SDK between its releases.
+    #
+    # **Note:** Before publishing stream_chat_flutter, this MUST be swapped
+    # back to a pub version constraint — git deps are not allowed on pub.dev
+    # and will block the release.
+    # ignore: invalid_dependency
+    git:
+      url: https://github.com/GetStream/stream-core-flutter.git
+      ref: 2aea1413997af886ee951921d71e6b8cb8c5cfbb
+      path: packages/stream_thumbnail
   svg_icon_widget: ^0.0.1
   synchronized: ^3.4.0
   theme_extensions_builder_annotation: ^7.1.0
-  thumblr: ^0.0.4
   url_launcher: ^6.3.2
   video_player: ^2.11.1