build(moq-video): bump moq-vaapi to 0.0.3 (dlopen libva)

[kixelated]

What

Bump moq-vaapi from 0.0.2 to 0.0.3 and correct the moq-video feature comments that still described the old hard-link behavior.

Why

moq-vaapi 0.0.3 (moq-dev/vaapi#1) switches from linking libva at build time to dlopening it at runtime (bindgen --dynamic-loading). The practical effects for this repo:

• An enabled-vaapi build no longer needs libva-dev / pkg-config at build time.
• The binary carries no NEEDED libva.so.2 — a libva-less host now loads and falls back to the next encoder (openh264) instead of failing at process load, exactly like the NVENC backend.
• This is the fix for moq-video: remaining work (codecs, platforms, decode, HW validation) #1837, and it unbreaks the moq-video docs.rs build (docs.rs builds on Linux with no libva-dev, which is why the vaapi default feature failed there).

0.0.x version requirements are exact, so the bump is required to pick up 0.0.3.

Testing

• moq-vaapi 0.0.3 (identical code) was verified on an aarch64 Linux host with no libva: builds with rust + clang only, the binary has no NEEDED libva, and it falls back gracefully whether libva is absent or present-without-a-driver.
• cargo update -p moq-vaapi --precise 0.0.3 resolves from crates.io; cargo check -p moq-video and taplo format --check pass locally.
• A real VAAPI hardware encode is still unverified (needs an x86 box with a working driver).

Note

This does not by itself refresh the live docs.rs page for the already-published moq-video 0.0.7 — docs.rs reads dependency metadata from the published crate, so the vaapi docs go green only when a new moq-video version ships carrying this bump.

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(written by Opus 4.8)

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

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Run ID: c8587f6f-178b-40bc-97b6-80b8e5690ca0

📥 Commits

Reviewing files that changed from the base of the PR and between 2646070 and 1b46ee2.

📒 Files selected for processing (4)

• flake.nix
• rs/moq-transcode/Cargo.toml
• rs/moq-video/Cargo.toml
• rs/moq-video/src/encode/backend/vaapi.rs

🚧 Files skipped from review as they are similar to previous changes (1)

• rs/moq-video/Cargo.toml

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Walkthrough

Updated the workspace moq-vaapi dependency from 0.0.2 to 0.0.3. Revised VAAPI feature and Linux dependency comments to document runtime libva loading, the absence of a libva NEEDED entry, and fallback behavior on hosts without libva.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: bumping moq-vaapi and noting the libva dlopen behavior.
Description check	✅ Passed	The description is directly related to the changeset and accurately explains the version bump and comment updates.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch claude/moq-video-build-docs-5b024c

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Actionable comments posted: 2

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@rs/moq-video/Cargo.toml`:
- Around line 31-34: Update both VAAPI comments in the feature section to
qualify the fallback behavior as applying only to automatic encoder selection.
Do not claim that explicit Hardware or Named selections fall back to another
encoder; preserve the existing feature configuration and code unchanged.
- Around line 89-91: Update the remaining VAAPI comments in vaapi.rs, flake.nix,
and moq-transcode’s Cargo.toml to reflect moq-vaapi 0.0.3’s current runtime
dlopen behavior: remove claims of link-time libva dependency and any wording
that presents dlopen as future work, while preserving accurate build and
fallback details.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

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Configuration used: Organization UI

Review profile: CHILL

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Run ID: f0fad2f7-7b09-4513-a5a0-78803b331aed

📥 Commits

Reviewing files that changed from the base of the PR and between 46eecbd and 23c60c3.

⛔ Files ignored due to path filters (1)

• Cargo.lock is excluded by !**/*.lock

📒 Files selected for processing (2)

• Cargo.toml
• rs/moq-video/Cargo.toml