I need to extract short audio segments at specific time stamps from specific dash segments.

I tried the following:

ffmpeg -ss 00:10:00 -i segment_x.m4s -t 10 out.mp3

-ss seeks relative to the segment’s start time however, and not absolutely.
That absolute time data is there however as ffmpeg prints it during the conversation like this:

Duration: 00:10:14.01, start: 595.018667, bitrate: 7 kb/s

How can I make ffmpeg start exactly at 00:10:00?