int last_timecode = -1; // Unwrapped.
// Metrics.
+ std::vector<std::pair<std::string, std::string>> labels;
std::atomic<int64_t> metric_input_received_frames{0};
std::atomic<int64_t> metric_input_dropped_frames_jitter{0};
std::atomic<int64_t> metric_input_dropped_frames_error{0};