message SabrSeek {
  enum SeekSource {
    SEEK_SOURCE_UNKNOWN = 0;
    SEEK_SOURCE_SABR_PARTIAL_CHUNK = 9;
    SEEK_SOURCE_SABR_SEEK_TO_HEAD = 10;
    SEEK_SOURCE_SABR_LIVE_DVR_USER_SEEK = 11;
    SEEK_SOURCE_SABR_SEEK_TO_DVR_LOWER_BOUND = 12;
    SEEK_SOURCE_SABR_SEEK_TO_DVR_UPPER_BOUND = 13;
    SEEK_SOURCE_SABR_ACCURATE_SEEK = 17;
    SEEK_SOURCE_SABR_INGESTION_WALL_TIME_SEEK = 29;
    SEEK_SOURCE_SABR_SEEK_TO_CLOSEST_KEYFRAME = 59;
    SEEK_SOURCE_SABR_RELOAD_PLAYER_RESPONSE_TOKEN_SEEK = 106;
  }

  optional int32 seek_time_ticks = 1;
  optional int32 timescale = 2;
  optional SeekSource seek_source = 3;
}