VModal for Flutter

Give your Android and iOS apps a multimodal memory.

Upload video. Find moments by meaning, speech, text, or imagery.
Keep the experience fast, native, and 100% Flutter.

Turn every video library into an experience your users can explore.

Build the feature people remember

VModal brings multimodal video search and mobile-friendly uploads to Dart with a small, typed API. Your app owns the interface; the SDK handles the VModal gateway, request models, responses, upload streams, progress, and cancellation.

Start in minutes

The public package source is available on GitHub. Add it to your app:

dependencies:
  vmodal_sdk_flutter:
    git:
      url: https://github.com/v-modal/vmodal_sdk_flutter.git
      ref: main

Then run:

flutter pub get

Create one client from the API key already loaded by your authenticated app:

import 'package:vmodal_sdk_flutter/vmodal_sdk_flutter.dart';

final keys = MutableApiKeyProvider(runtimeApiKey);
final vmodal = VmodalClient(
  config: SdkConfig(apiKeyProvider: keys),
);

The SDK never owns your login screen or persists your API key. It receives an in-memory credential from your application at runtime.

Search video with natural language

final groups = await vmodal.collections.listGroups(mode: 'vid_file');
if (groups.data.isEmpty) {
  throw StateError('No video collection exists for this API key');
}
final group = groups.data.first;
final version = group.latestLancedbVersion;
if (version == null) {
  throw StateError('The collection has no searchable LanceDB version');
}

final results = await vmodal.searches.searchVideo(
  SearchRequest(
    queryText: 'the cyclist crossing the bridge at sunset',
    groupName: group.groupName,
    searchSources: const ['image'],
    versionLancedb: version,
    limit: 20,
  ),
);

print('${results.cntActual} moments found');
for (final moment in results.data) {
  print(moment);
}

The collection must be a vid_file GroupItem returned for the current runtime API key. Collection access is key-scoped; a name copied from another account or environment can return HTTP 404 even when the search route is healthy. The example name flutter_example is valid only after that key has uploaded or otherwise created the collection and a refreshed listGroups() response contains it. Search must also send an advertised lancedbVersions value; latestLancedbVersion converts values such as v1 to the numeric request field version_lancedb: 1.

The response stays typed where the contract is stable and preserves the raw JSON so new server fields remain available immediately.

Upload with progress and cancellation

The SDK reads an app-accessible File as a stream. It does not load the entire video into memory.

import 'dart:io';

final task = vmodal.collections.videoUpload(
  UploadSource.fromFile(File(videoPath)),
  collectionName: 'travel_diaries',
  subCollectionName: 'mobile_uploads',
);

final progress = task.progress.listen((value) {
  print('Uploading ${value.percent}%');
});

// Connect this to your Flutter cancel button when needed:
// task.cancel();

final uploaded = await task.result;
await progress.cancel();
print('Ready: ${uploaded.fileName}');

Signed single upload is the production default for every file size. Multipart upload is experimental and must be enabled explicitly with VideoUploadOptions(multipart: true); it fails with FeatureDisabled when the complete backend route family is unavailable.

Designed for real mobile lifecycles

• Rotate credentials without rebuilding the client: keys.rotate(newApiKey).
• Cancel search or upload work when a screen closes.
• Show upload progress from a broadcast Dart stream.
• Keep file picking, secure storage, background scheduling, and lifecycle UI in the parent app.
• Close network resources deterministically with await vmodal.close().

For logout or account switching, cancel active work, clear upload persistence, call keys.clear(), close the client, and create a new client for the next identity. Key rotation alone is not an identity switch.

One client, focused resources

vmodal.auth          identity and health
vmodal.searches      multimodal video search
vmodal.collections   upload and collection lifecycle
vmodal.indexes       create, inspect, and delete indexes
vmodal.admin         usage and cache statistics
vmodal.r2            presigned object-storage operations
vmodal.images        image retrieval

Gateway mode is the safe default and sends caller identity only as a bearer credential. VmodalClient.unsafeDirect is reserved for trusted private networks.

Platform support

Minimum toolchain: Flutter 3.44.0 and Dart 3.12.0.

Explore the SDK

• Browse the public SDK reference
• Run the complete example app
• Read the SDK guide
• Manage API keys safely
• Build a search experience
• Review the API contract
• Open an issue

Development

git clone https://github.com/v-modal/vmodal_sdk_flutter.git
cd vmodal_sdk_flutter
bash install.sh install
bash test.sh all

The offline gate analyzes the package, runs the SDK and example tests, checks route synchronization, and validates Android/iOS example builds. Live tests require the repository's existing test credentials and are intentionally separate.

Build video experiences people can search, not just scroll.

_{Flutter and the related logo are trademarks of Google LLC. VModal is not endorsed by or affiliated with Google LLC.}