[ts-sdk] Add VP8 and VP9 to RTMP output

[wkazmierczak]

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[Copilot]

Pull request overview

Adds Enhanced RTMP (E-RTMP) codec options to the TypeScript SDK surface area so RTMP client outputs can be configured with VP8/VP9 video and Opus audio, aligning TS types and request-mapping with the backend API.

Changes:

• Extend TS output option types for RTMP client outputs to include ffmpeg_vp8, ffmpeg_vp9, and opus.
• Update smelter-core RTMP output request mapping to serialize the new encoder variants into the API (snake_case) shape.
• Refresh OpenAPI / Rust schema documentation for bitrate description formatting and examples.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
ts/smelter/src/types/output/rtmp.ts	Adds new RTMP encoder variants to the public TS SDK types.
ts/smelter/src/api.generated.ts	Regenerates API types to include the new RTMP encoder unions.
ts/smelter-core/src/api/output/rtmp.ts	Extends RTMP encoder-to-API mapping to handle VP8/VP9 and Opus.
tools/schemas/openapi_specification.json	Updates bitrate description text formatting (adds example line break).
smelter-api/src/output/rtmp.rs	Updates Rust/OpenAPI docs for VP8/VP9 bitrate description example text.

Comments suppressed due to low confidence (2)

ts/smelter/src/types/output/rtmp.ts:64

• The new ffmpeg_vp9 RTMP encoder option is missing the API note that it requires Enhanced RTMP support on the receiver side. Please add the same warning as in the OpenAPI/Rust schema so TS SDK users understand compatibility constraints.

      type: 'ffmpeg_vp9';
      /**
       * Encoding bitrate. If not provided, bitrate is calculated based on resolution and framerate.
       * For example at 1080p 30 FPS the average bitrate is 5000 kbit/s and max bitrate is 6250 kbit/s.
       */

ts/smelter-core/src/api/output/rtmp.ts:101

• intoRtmpClientAudioEncoderOptions has no default branch / fallback after the switch, so an unexpected encoder.type would make this function return undefined at runtime. Add an explicit default that throws a clear error (or an assertUnreachable) to avoid hard-to-debug failures downstream.

        sample_rate: encoder.sampleRate,
      };
  }
}

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