refactor(ui): replace thumblr with stream_thumbnail on desktop - #2948
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`thumblr_macos` has no Swift Package Manager support, which blocked SPM adoption for the SDK. Rather than wait on the plugin maintainers, desktop thumbnailing now goes through `stream_thumbnail`, which we own and which ships a `Package.swift` for both iOS and macOS alongside its podspec. `video_service.dart` no longer branches on `isDesktopDevice`: every platform takes the same `StreamThumbnail.thumbnailData` path, so one code path replaces two. Desktop also gains capability it did not have — `thumblr.generateThumbnail` only accepted a local `filePath`, so a remote or authenticated video URL could not be thumbnailed there at all, even though `StreamVideoThumbnailImage` accepts `headers` and documents `https://` sources. Two consequences for consumers, both in the changelog: a Linux build now needs the FFmpeg and libwebp dev packages, since the plugin registers a Linux implementation and is compiled into the app; and Windows cannot attach `headers`, so an authenticated URL will not resolve there. The dependency is pinned to a git ref for now — the `stream_thumbnail` release carrying this is not on pub.dev yet. Verified by building the macOS example, which resolves the plugin through SPM rather than CocoaPods, plus `dart analyze` on the package. Refs FLU-624. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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Included review availability: Your plan provides up to 4 included reviews per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe PR replaces ChangesVideo thumbnail migration
Priority: ⬇️ Low — Defer this thumbnail dependency refactor because its scope is limited to platform-specific video thumbnail generation and build configuration, with no supplied external urgency. Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to Thumbnail generation now uses the stream_thumbnail plugin across platforms, with no unresolved current merge-readiness risk identified. Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Dropped why we made the change — thumblr_macos lacking SPM, thumblr only taking a local file path — since neither alters what a consumer does. What is left is the three things that do: desktop handles remote URLs now, Linux needs the dev packages, Windows drops headers. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Same comment and `ignore: invalid_dependency` we add whenever stream_core_flutter is pinned to a git ref here (see #2903), so the analyzer stops flagging the dependency and the note about swapping it back before publishing travels with it. Verified the comment survives `melos bootstrap` — the rewrite leaves it alone while melos.yaml and the pubspec already agree on the spec. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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In `@packages/stream_chat_flutter/CHANGELOG.md`:
- Around line 5-8: Update the changelog entry to limit the authenticated
remote-video URL claim to macOS and Linux, excluding Windows because it cannot
attach headers.
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"Desktop can now thumbnail remote video URLs, including authenticated ones" covered Windows, which the next bullet said cannot send headers. Windows does handle a remote URL — MFCreateSourceReaderFromURL takes one; it is only headers it cannot attach. So the split is per capability, not per platform, and the two bullets are merged so they cannot drift apart again. Reported by CodeRabbit on #2948. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Which platforms can send headers for an authenticated video URL is not something a consumer of this SDK acts on — they call StreamVideoThumbnailImage and it either renders or falls back to the placeholder. The per-platform detail stays where it is useful, on generateVideoThumbnail's dartdoc. What is left is the two things a consumer does act on: thumblr is gone from the dependency tree, and a Linux build needs the FFmpeg and libwebp dev packages. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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September 8, 2026 14:22
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## master #2948 +/- ##
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Closes FLU-624.
What changed
thumblr_macoshas no Swift Package Manager support, which blocked SPM adoption for the SDK. FLU-624 offered two routes — ask the plugin maintainers to adopt SPM, or replace the dependency. This takes the second: desktop thumbnailing now goes throughstream_thumbnail, which we own and which ships aPackage.swiftfor both iOS and macOS alongside its podspec.thumblris removed as a dependency, andvideo_service.dartno longer branches onisDesktopDevice— every platform takes the sameStreamThumbnail.thumbnailDatapath, so one code path replaces two.Desktop also gains capability it did not have.
thumblr.generateThumbnailonly accepted a localfilePath, so a remote or authenticated video URL could not be thumbnailed on desktop at all, even thoughStreamVideoThumbnailImageacceptsheadersand documentshttps://sources.Consumer impact
Both are in the changelog:
libavcodec-dev libavformat-dev libavutil-dev libswscale-dev libwebp-devon Debian/Ubuntu).stream_thumbnailregisters a Linux implementation, so it is compiled into the app whether or not the Dart code calls it there — visible in thegenerated_plugins.cmakediff.headers, so an authenticated remote video URL will not resolve there. It could not before either, so this is not a regression.stream_thumbnailis pinned to a git ref, matching howstream_core_flutterhas been pinned here before; the release carrying these changes is not on pub.dev yet.How it was verified
dart analyzeclean onstream_chat_flutter, and the macOS example builds — resolving the plugin through SPM rather than CocoaPods, which is the thing FLU-624 was blocked on. Building it also triggered Flutter's one-time SPM migration and macOS template bump on the example's Xcode project; those are unrelated to this change and were reverted to keep the diff to the dependency swap.🤖 Generated with Claude Code
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