PhxDemo.Plan (phx_demo v0.1.1)

Maps a demo timeline onto its raw video, then decides what to keep.

Timeline times start at the sync flash. sync_ms is where that flash appears in the raw video (found by PhxDemo.Render), so an event's position in the raw video is sync_ms + at_ms.

Trimming keeps from the intro card (or shortly before the first real step) to shortly after the last event (or the end of the outro). The sync flash is always cut: clear_ms, when given, is the raw video's first frame after the flash, and the output never starts before it (the next step can be recorded a frame or two before the browser paints it). Events are returned re-based to the trimmed output.

Summary

Types

t()

Functions

build(timeline, opts)

Builds the plan.

Types

t()

@type t() :: %PhxDemo.Plan{
  duration_ms: term(),
  events: term(),
  timeline: term(),
  trim_end: term(),
  trim_start: term()
}

Functions

build(timeline, opts)

Builds the plan.

iex> timeline = %{"settings" => %{"trim" => true}, "events" => [
...>   %{"type" => "sync_end", "at_ms" => 200},
...>   %{"type" => "scene", "at_ms" => 210, "title" => "A"},
...>   %{"type" => "say", "at_ms" => 1000, "duration_ms" => 1000, "text" => "Hi"}]}
iex> plan = PhxDemo.Plan.build(timeline, sync_ms: 100, video_ms: 10_000)
iex> {plan.trim_start, plan.trim_end, plan.duration_ms}
{700, 2700, 2000}
iex> Enum.map(plan.events, &{&1["type"], &1["at_ms"]})
[{"scene", 0}, {"say", 400}]