fflush(stdin);
while (c != 's') {
if (c == '\n' && enable_labeling == 1) {
clock_time = webrtc::TickTime::MillisecondTimestamp();
timing << clock_time << std::endl;
}
fflush(stdin);
while (c != 's') {
if (c == '\n' && enable_labeling == 1) {
clock_time = webrtc::TickTime::MillisecondTimestamp();
timing << clock_time << std::endl;
}