shaka-packager/packager/mpd/base/media_info.proto

// This file defines the protocol between Muxer and classes for generating MPD
// files.

syntax = "proto2";

package edash_packager;

message Range {
  optional uint64 begin = 1;
  optional uint64 end = 2;
}

message MediaInfo {
  enum ContainerType {
    CONTAINER_UNKNOWN = 0;
    CONTAINER_MP4 = 1;
    CONTAINER_MPEG2_TS= 2;
    CONTAINER_WEBM = 3;
  }

  message VideoInfo {
    optional string codec = 1;

    // The width and height of the actual number of pixels. This will not be the
    // same as the visual width and height if the sample aspect ratio (sar)
    // is not 1:1.
    optional uint32 width = 2;
    optional uint32 height = 3;

    optional uint32 time_scale = 4;
    // Relative to |time_scale|. IOW |time_scale| / |frame_duration| is the
    // framerate.
    optional uint64 frame_duration = 5;
    optional bytes decoder_config = 6;

    // pixel_width:pixel_height is the the sample aspect ratio (sar) of the
    // video.
    // Note that (pixel_width * width):(pixel_height * height) is the picture
    // aspect ratio, or the @par attribute set on AdaptationSet element.
    optional uint32 pixel_width = 7;
    optional uint32 pixel_height = 8;
  }

  message AudioInfo {
    optional string codec = 1;
    optional uint32 sampling_frequency = 2;
    optional uint32 time_scale = 3;
    optional uint32 num_channels = 4;
    optional string language = 5;
    optional bytes decoder_config = 6;
  }

  message TextInfo {
    optional string format = 1;
    optional string language = 2;
  }

  message ContentProtectionXml {
    message AttributeNameValuePair {
      optional string name = 1;
      optional string value = 2;
    }

    message Element {
      optional string name = 1;
      repeated AttributeNameValuePair attributes = 2;
      repeated Element subelements = 3;
    }

    // These two string fields are specified by the MPD spec. Just for
    // clarification, the string set in |value| is the rhs of 'value' field in
    // <ContentProtection>.
    optional string scheme_id_uri = 1;
    optional string value = 2;
    repeated AttributeNameValuePair attributes = 3;
    repeated Element subelements = 4;
  }

  optional uint32 bandwidth = 1;

  // Note that DASH IOP v3.0 explicitly mentions that a segment should only
  // have one {video, audio, text} track.
  optional VideoInfo video_info = 2;
  optional AudioInfo audio_info = 3;
  optional TextInfo text_info = 4;
  repeated ContentProtectionXml content_protections = 5;

  // This is the reference time scale if there are multiple VideoInfo and/or
  // AudioInfo.
  optional uint32 reference_time_scale = 13;
  optional ContainerType container_type = 14 [default = CONTAINER_UNKNOWN];

  // VOD only.
  optional Range init_range = 6;
  optional Range index_range = 7;
  optional string media_file_name = 8;
  optional float media_duration_seconds = 9;
  // END VOD only.

  // LIVE only.
  optional string init_segment_name = 10;
  optional string segment_template = 11;
  // This value is the user input “segment duration”.
  // This value is not necessarily the same as the value passed to
  // MpdNotifier::NotifyNewSegment().
  optional float segment_duration_seconds = 12;
  // END LIVE only.
}