Freenove 4WD Smart Car Board for Raspberry Pi - Page 97

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Chapter 7 Smart video car
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self.server_socket.close()
try:
with picamera.PiCamera() as camera:
camera.resolution = (400,300) # pi camera resolution
camera.framerate = 30 # 15 frames/sec
time.sleep(2) # give 2 secs for camera to initilize
start = time.time()
stream = io.BytesIO()
# send jpeg format video stream
print "Start transmit ... "
for foo in camera.capture_continuous(stream, 'jpeg', use_video_port = True):
try:
self.connection.flush()
stream.seek(0)
b = stream.read()
lengthBin = struct.pack('L', len(b))
self.connection.write(lengthBin)
self.connection.write(b)
if time.time() - start > 600:
break
stream.seek(0)
stream.truncate()
except :
print "End transmit ... "
break
except:
print "Camera unintall"