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add cv2 video stream

master
Lennart Heimbs 2 years ago
parent
commit
c3fea65346
1 changed files with 23 additions and 26 deletions
  1. 23
    26
      camera/video_client_pi_cv2.py

+ 23
- 26
camera/video_client_pi_cv2.py View File

@@ -12,33 +12,30 @@ client_socket.connect(('my_server', 8000))
# Make a file-like object out of the connection
connection = client_socket.makefile('wb')
try:
cap = cv2.
with picamera.PiCamera() as camera:
camera.resolution = (640, 480)
# Start a preview and let the camera warm up for 2 seconds
camera.start_preview()
time.sleep(2)
cap = cv2.VideoCapture("run.mp4")

# Note the start time and construct a stream to hold image data
# temporarily (we could write it directly to connection but in this
# case we want to find out the size of each capture first to keep
# our protocol simple)
start = time.time()
stream = io.BytesIO()
for foo in camera.capture_continuous(stream, 'jpeg'):
# Write the length of the capture to the stream and flush to
# ensure it actually gets sent
connection.write(struct.pack('<L', stream.tell()))
connection.flush()
# Rewind the stream and send the image data over the wire
stream.seek(0)
connection.write(stream.read())
# If we've been capturing for more than 30 seconds, quit
if time.time() - start > 30:
break
# Reset the stream for the next capture
stream.seek(0)
stream.truncate()
while True:
ret, frame = cap.read()

if frame == None:
break
image = cv2.imencode('.jpg', frame)
stream = image.tobytes()

# Write the length of the capture to the stream and flush to
# ensure it actually gets sent
connection.write(struct.pack('<L', stream.tell()))
connection.flush()
# Rewind the stream and send the image data over the wire
stream.seek(0)
connection.write(stream.read())
# If we've been capturing for more than 30 seconds, quit
if time.time() - start > 30:
break
# Reset the stream for the next capture
stream.seek(0)
stream.truncate()
# Write a length of zero to the stream to signal we're done
connection.write(struct.pack('<L', 0))
finally:

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