title: HLS: reading PRIV ID3 tag with com.apple.streaming.transportStreamTimestamp PTS time mark
body: <p>I have a hls live stream where i can go back 30 minutes (timeshift):</p>
  
  <p>I want to save a part of the 30 minutes window as mp4 file locally.</p>
  
  <p>I parsed the playlist, downloaded the single ts and aac segments and have put them together (concatinate). The result is always asynchronous.</p>
  
  <p>There is a timestamp in the ts segments but not in the aac segments. 
  The timestamps of the aac segment are probably in a private id3 tag, but i don't know how i can read them.</p>
  
  <p>Here is a good analysis:
  <a href="https://github.com/flavioribeiro/nginx-audio-track-for-hls-module/issues/22" rel="nofollow noreferrer">https://github.com/flavioribeiro/nginx-audio-track-for-hls-module/issues/22</a></p>
  
  <p>Does anyone have an idea how i can read that timestamp (OS: Linux)?</p>