Examples — MoQT draft-07 §7.4.

Sending a track on one stream:

STREAM_HEADER_TRACK {
  Track Alias = 1
  Publisher Priority = 0
}
{
  Group ID = 0
  Object ID = 0
  Object Payload Length = 4
  Payload = "abcd"
}
{
  Group ID = 1
  Object ID = 0
  Object Payload Length = 4
  Payload = "efgh"
}

Sending a subgroup on one stream:

Stream = 2

STREAM_HEADER_SUBGROUP {
  Track Alias = 2
  Group ID = 0
  Subgroup ID = 0
  Publisher Priority = 0
}
{
  Object ID = 0
  Object Payload Length = 4
  Payload = "abcd"
}
{
  Object ID = 1
  Object Payload Length = 4
  Payload = "efgh"
}