The timestamps must correspond to the time elapsed since the Unix epoch
and not since Jan 1 1900 (which is used by the RTCP SRs).
Bug: webrtc:12529,webrtc:12605
Change-Id: I6013cf3d9bf9915b5f5db8661f7b2b84231cca57
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/212606
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Sam Zackrisson <saza@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33538}