+inline std::vector<FrameOnDisk>::const_iterator
+find_first_frame_at_or_after(const std::vector<FrameOnDisk> &frames, int64_t pts_origin)
+{
+ return std::upper_bound(frames.begin(), frames.end(), pts_origin - 1,
+ [](int64_t pts, const FrameOnDisk &frame) { return pts < frame.pts; });
+}
+