Class: TimestampMaker::Handlers::Ffmpeg

Inherits:
Object
  • Object
show all
Defined in:
lib/timestamp_maker/handlers/ffmpeg.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(time_zone_lookuper:) ⇒ Ffmpeg

Returns a new instance of Ffmpeg.



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# File 'lib/timestamp_maker/handlers/ffmpeg.rb', line 15

def initialize(time_zone_lookuper:)
  @time_zone_lookuper = time_zone_lookuper
end

Instance Attribute Details

#time_zone_lookuper ⇒ Object

Returns the value of attribute time_zone_lookuper.



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# File 'lib/timestamp_maker/handlers/ffmpeg.rb', line 13

def time_zone_lookuper
  @time_zone_lookuper
end

Instance Method Details

#accept?(mime_type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/timestamp_maker/handlers/ffmpeg.rb', line 19

def accept?(mime_type)
  mime_type.start_with?('video/')
end

#add_timestamp(input_path, output_path, time, format:, font_size:, font_family:, font_color:, background_color:, coordinate_origin:, x:, y:, font_padding:) ⇒ Object 



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# File 'lib/timestamp_maker/handlers/ffmpeg.rb', line 23

def add_timestamp(
  input_path,
  output_path,
  time,
  format:,
  font_size:,
  font_family:,
  font_color:,
  background_color:,
  coordinate_origin:,
  x:,
  y:,
  font_padding:
)
  creation_timestamp = time.to_i
  text = "%{pts:localtime:#{creation_timestamp}:#{escape_text_expansion_argument(format)}}"
  drawtext = +"#{coord_map(coordinate_origin, x, y)}:" << %W[
    font=#{escape_filter_description_value(font_family)}
    fontsize=#{font_size}
    fontcolor=#{font_color}
    box=1
    boxcolor=#{background_color}
    boxborderw=#{font_padding}
    text=#{escape_filter_description_value(text)}
  ].join(':')

  command = %W[
    ffmpeg -y
    -v warning
    -i #{input_path}
    -map_metadata 0
    -vf drawtext=#{escape_filter_description(drawtext)}
    #{output_path}
  ]

  tz = tz_env_string(time)
  raise "Command failed with exit #{$CHILD_STATUS.exitstatus}: #{command.first}" unless system({ 'TZ' => tz },
                                                                                               *command)
end

#creation_time(input_path) ⇒ Object 



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# File 'lib/timestamp_maker/handlers/ffmpeg.rb', line 63

def creation_time(input_path)
  command = %W[
    ffprobe -v warning -print_format json
    -show_entries format_tags=creation_time,com.apple.quicktime.creationdate,location
    #{input_path}
  ]
  stdout_string, status = Open3.capture2(*command)
  raise unless status.success?

  parsed = JSON.parse(stdout_string)
  iso8601_string = parsed['format']['tags']['com.apple.quicktime.creationdate'] || parsed['format']['tags']['creation_time']
  raise 'Cannot find creation time' if iso8601_string.nil?

  time = Time.iso8601(iso8601_string)

  iso6709_string = parsed['format']['tags']['location']
  if iso6709_string && (time_zone = retrieve_time_zone_from_iso6709(iso6709_string))
    begin
      return TZInfo::Timezone.get(time_zone).to_local(time)
    rescue TZInfo::InvalidTimezoneIdentifier
      warn "Can not find time zone: #{time_zone}"
    end
  end

  time
end