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python - picamera mmal 错误（一个脚本有效，另一个无效）

问题描述

所以我有两个版本的 picamera 拍照。这个在我跑步时有效。

import cameraTrigger as ct
from picamera import PiCamera
import time

n=1
TOTAL_PICS=30
while n <= TOTAL_PICS:
    img = ct.takePic()
    n+=1

相机触发器.py

import time
import socket
import pickle as p
import numpy as np
import cv2
from picamera import PiCamera
from common import constantSource as cs

camera = PiCamera()
size = cs.getImageSize()
camera.resolution = size
def takePic(path=None):

    if path is not None:
        start = time.time()
        camera.capture(path)
        end = time.time()
        print("Trigger time: " + str(end-start))
        data = None
    elif path is None:
        start = time.time()
        data = np.empty((size[1], size[0], 3), dtype=np.uint8)
        camera.capture(data, "bgr")
        end = time.time()
        print("Trigger time: " + str(end-start))
    return data

但是，这个（集成脚本）不起作用。它停在第 3 行 (camera = PiCamera())。

from picamera import PiCamera
import time
camera = PiCamera()
camera.resolution = (720,560)
time.sleep(2.0)
n=1
TOTAL_PICS=30
while n <= TOTAL_PICS:
    img = np.empty((560,720,3),dtype=np.uint8)
    camera.capture(img,"bgr")
    n+=1

有这个错误

mmal: mmal_vc_port_enable: failed to enable port vc.null_sink:in:0(OPQV): ENOSPC
mmal: mmal_port_enable: failed to enable connected port (vc.null_sink:in:0(OPQV))0x10ad0a0 (ENOSPC)
mmal: mmal_connection_enable: output port couldn't be enabled
Traceback (most recent call last):
  File "stereoCalibration_pi.py", line 17, in <module>
    left = PiCamera()
  File "/home/pi/.virtualenvs/cv/local/lib/python3.5/site-packages/picamera/camera.py", line 433, in __init__
    self._init_preview()
  File "/home/pi/.virtualenvs/cv/local/lib/python3.5/site-packages/picamera/camera.py", line 513, in _init_preview
    self, self._camera.outputs[self.CAMERA_PREVIEW_PORT])
  File "/home/pi/.virtualenvs/cv/local/lib/python3.5/site-packages/picamera/renderers.py", line 558, in __init__
    self.renderer.inputs[0].connect(source).enable()
  File "/home/pi/.virtualenvs/cv/local/lib/python3.5/site-packages/picamera/mmalobj.py", line 2212, in enable
    prefix="Failed to enable connection")
  File "/home/pi/.virtualenvs/cv/local/lib/python3.5/site-packages/picamera/exc.py", line 184, in mmal_check
    raise PiCameraMMALError(status, prefix)
picamera.exc.PiCameraMMALError: Failed to enable connection: Out of resources

我遇到错误的原因是什么？提前谢谢你的帮助！！

标签： pythoncameraraspberry-pi

解决方案

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