Class: Ace::Demo::Molecules::MediaRetimer

Inherits:
Object
  • Object
show all
Defined in:
lib/ace/demo/molecules/media_retimer.rb

Instance Method Summary collapse

Constructor Details

#initialize(ffmpeg_bin: "ffmpeg") ⇒ MediaRetimer

Returns a new instance of MediaRetimer.



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# File 'lib/ace/demo/molecules/media_retimer.rb', line 11

def initialize(ffmpeg_bin: "ffmpeg")
  @ffmpeg_bin = ffmpeg_bin
end

Instance Method Details

#retime(input_path:, speed:, output_path: nil, dry_run: false) ⇒ Object 



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# File 'lib/ace/demo/molecules/media_retimer.rb', line 15

def retime(input_path:, speed:, output_path: nil, dry_run: false)
  raise ArgumentError, "Input file not found: #{input_path}" unless File.exist?(input_path)

  parsed = Atoms::PlaybackSpeedParser.parse(speed)
  raise ArgumentError, "Playback speed is required." unless parsed

  target_path = output_path || default_output_path(input_path, parsed[:label])
  return {input_path: input_path, output_path: target_path, speed: parsed[:label], dry_run: true} if dry_run

  ensure_ffmpeg_available!
  FileUtils.mkdir_p(File.dirname(target_path))

  cmd = build_ffmpeg_command(
    input_path: input_path,
    output_path: target_path,
    factor: parsed[:factor]
  )
  _stdout, stderr, status = Open3.capture3(*cmd)
  raise MediaRetimeError, "FFmpeg retime failed: #{stderr.strip}" unless status.success?

  {input_path: input_path, output_path: target_path, speed: parsed[:label], dry_run: false}
rescue Errno::ENOENT
  raise FfmpegNotFoundError, "FFmpeg not found. Install ffmpeg to use retime."
end