estimate absolute timestamp more precisely

[aler9]

When the absolute timestamp of incoming frames was not available, it
was filled with the current timestamp, which is influenced by latency
over time.

This mechanism is replaced by an algorithm that detects when latency is
the lowest, stores the current timestamp and uses it as reference
throughout the rest of the stream.

[codecov]

Codecov Report

❌ Patch coverage is 49.71098% with 87 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.66%. Comparing base (f5f0356) to head (aa1ea76).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/protocols/hls/to_stream.go	33.33%	37 Missing and 1 partial ⚠️
internal/protocols/webrtc/to_stream.go	17.85%	21 Missing and 2 partials ⚠️
internal/protocols/mpegts/to_stream.go	0.00%	10 Missing ⚠️
internal/protocols/rtmp/to_stream.go	9.09%	10 Missing ⚠️
internal/stream/stream_format.go	57.14%	2 Missing and 1 partial ⚠️
internal/protocols/webrtc/incoming_track.go	50.00%	2 Missing ⚠️
internal/protocols/rtsp/to_stream.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5078      +/-   ##
==========================================
+ Coverage   54.57%   54.66%   +0.09%     
==========================================
  Files         180      181       +1     
  Lines       18620    18653      +33     
==========================================
+ Hits        10161    10197      +36     
+ Misses       7742     7738       -4     
- Partials      717      718       +1     

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[github-actions]

This issue is mentioned in release v1.15.2 🚀
Check out the entire changelog by clicking here