timestamp id3 tag needed to avoid the overlap delay:

https://www.wowza.com/community/t/id3-priv-tag-in-aac-chunks-for-hls-streaming-is-it-necessary/34473


https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming#section-6.2.4

https://datatracker.ietf.org/doc/html/draft-pantos-http-live-streaming#section-3.4
A Packed Audio Segment has no Media Initialization Section.

   Each Packed Audio Segment MUST signal the timestamp of its first
   sample with an ID3 PRIV tag [ID3] at the beginning of the segment.
   The ID3 PRIV owner identifier MUST be
   "com.apple.streaming.transportStreamTimestamp".  The ID3 payload MUST
   be a 33-bit MPEG-2 Program Elementary Stream timestamp expressed as a
   big-endian eight-octet number, with the upper 31 bits set to zero.
   Clients SHOULD NOT play Packed Audio Segments without this ID3 tag.

mp3 options:
-write_xing 0/1
-id3v2_version 3
-write_id3v1 0/1


https://patchwork.ffmpeg.org/project/ffmpeg/patch/20180112211305.5812-1-rshaffer@tunein.com/
patch for ffmpeg to add ability to set/retrieve priv tags