# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 8
def accept?(blob)
  blob.video? && ffmpeg_exists?
end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 12
def ffmpeg_exists?
  return @ffmpeg_exists unless @ffmpeg_exists.nil?

  @ffmpeg_exists = system(ffmpeg_path, "-version", out: File::NULL, err: File::NULL)
end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 18
def ffmpeg_path
  ActiveStorage.paths[:ffmpeg] || "ffmpeg"
end

# File activestorage/lib/active_storage/previewer/video_previewer.rb, line 23
def preview(**options)
  download_blob_to_tempfile do |input|
    draw_relevant_frame_from input do |output|
      yield io: output, filename: "#{blob.filename.base}.jpg", content_type: "image/jpeg", **options
    end
  end
end