Record video on the raspberry pi camera module with timestamp annotation on each frame

picamera_video_timestamp.py

import picamera
import picamera.array
import time, datetime

# Use the motiondetector analyze callback to annotate the video with a UTC time stamp
class MotionDetector(picamera.array.PiMotionAnalysis):
    def analyze(self, a):
        camera.annotate_text = datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S.%f')[:-3]

with picamera.PiCamera() as camera:
    camera.resolution = (1296, 972)
    camera.framerate = 24
    camera.annotate_text_size = 16

    filename = "video-%s.h264" % time.strftime("%Y%m%d-%H%M%S-%Z", time.localtime())
    camera.start_recording(filename, motion_output=MotionDetector(camera), sps_timing=True)
    camera.wait_recording(120)
    camera.stop_recording()