Support audio and image footage#95
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ButterCut treated every clip as a video file with both a video and an audio stream. Bring audio (music, voiceover) and still images in as first-class footage: import them into a library, place them on the single timeline track, and export to Final Cut, Premiere, and Resolve. A per-clip media_type (video | audio | image) drives it. The library infers it from the file extension at import; the exporter threads it through to the generators, which require it and emit the right timeline element per kind. One discriminator covers what audio and images break — images carry no intrinsic duration, audio has no video stream, and images have no audio stream. - Library: stamp media_type on every clip, synthesize a duration for stills, and judge readiness per kind (audio and images need only a summary; audio's transcript is optional). - Processing: build contact sheets for video only; summarize audio from its transcript and images from the image; skip stills in transcription. - Export: require and validate media_type, fall back to sane defaults when a stream is absent, and give images a default 5s on-timeline duration (overridable per cut). FCP7 emits audio-only and still clipitems with correct per-track link indices; FCPX sets hasVideo/hasAudio per kind. Timelines stay strictly single-track: an audio or image clip takes its own slot and plays only during it. Migrate existing libraries with scripts/005_migrate_add_media_type.rb, which stamps every pre-existing clip media_type: video (idempotent). 249 specs pass; FCPX output validates against FCPXMLv1_8.dtd.
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This is too much to add at once via ai. Going to break this off into two PRs. Add image support (core) |
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Adds audio (music, voiceover) and still images as first-class footage alongside video — import them into a library, place them on the single timeline track, and export to Final Cut, Premiere, and Resolve.
A per-clip
media_type(video | audio | image) drives it: the library infers it at import, and the exporter requires it to emit the right timeline element per kind. Stays single-track. Existing libraries migrate withscripts/005_migrate_add_media_type.rb.