Slice 10 — Folder audio + soundtrack playback #11

Parent

#1

What to build

Audio files (MP3/M4A/WAV) in the project folder are detected and offered as soundtrack choices; the selected track plays under the slideshow from frame 0 and is recorded in slideshow.json. RenderPlan gains an audio track concept (constant volume for now).

Type: AFK | Stories: 17

User stories covered

• Story 17: any audio file already in the project folder is offered as a soundtrack option

Acceptance criteria

• Given audio files in the folder, when the project opens, then they are listed as soundtrack options distinct from visual media (and excluded from the storyboard grid).
• Given a selected soundtrack, when played, then music starts with the show and the selection persists across reopen.
• Given a show longer than the track, when playback passes the track end, then audio ends gracefully (no crash, no loop) — looping is out of scope.

Technical notes

Audio duration via Mediabunny (remotion-best-practices: get-audio-duration, audio).

Blocked by

• Blocked by Slice 5 — Sequence Planner + transition vocabulary #6