Switch AVC_LEVEL_4_0 from Baseline profile (avc1.420028) to High profile
(avc1.640028) for broader platform compatibility. Feed audio to the muxer
before video frames so packets are properly interleaved — previously all
audio was dumped after video, causing Discord to skip the audio stream.
Probe total video duration upfront to trim audio to match video length.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Install mediabunny@^1.28.0 for video processing
- Add audioInput and videoStitch to NodeType union
- Add AudioInputNodeData interface (audioFile, filename, duration, format)
- Add VideoStitchClip interface for filmstrip items
- Add VideoStitchNodeData interface (clips, clipOrder, outputVideo, progress, encoderSupported)
- Update WorkflowNodeData union to include new node types
- Extend HandleType to include audio and video handles
- Create src/lib/video-encoding.ts with AVC encoding config helpers
shrimbly