我有两个网络摄像头,我想用来拍照。以下代码实现了这一点:
import pygame
import pygame.camera
from datetime import datetime
import Image
import threading
import time
class Camera (threading.Thread):
def __init__(self, camera):
self.camera = pygame.camera.Camera(camera,(2304,1536))
self.stop = False
threading.Thread.__init__(self)
def run(self):
self.camera.start()
srf = self.camera.get_image()
img = pygame.image.tostring(srf, 'RGB')
img = Image.fromstring('RGB', srf.get_size(), img)
img.save('%s.png'%datetime.now(), 'PNG')
s = datetime.now()
pygame.init()
pygame.camera.init()
cam1 = Camera("/dev/video0")
cam2 = Camera("/dev/video1")
cam1.start()
cam2.start()
cam1.join()
cam2.join()
print datetime.now() - s
但我需要设置焦点。
我找到了这些命令行:
apt-get install uvcdynctrl
uvcdynctrl --device=/dev/video1 --clist
uvcdynctrl --device=/dev/video1 --get='Focus, Auto'
uvcdynctrl --device=/dev/video1 --set='Focus, Auto' 0
uvcdynctrl --device=/dev/video1 --set='Focus (absolute)' 20
虽然我可以使用以下内容:
import os
os.system('command to set the focus')
但是在我的 (Logitech) 相机上它不起作用,我从命令行(Ubuntu 12.04,python 2.7)得到这个输出:
uvcdynctrl --device=/dev/video1 --set='Focus, Auto' 0
[libwebcam] Unsupported V4L2_CID_EXPOSURE_AUTO control with a non-contiguous
range of choice IDs found
[libwebcam] Invalid or unsupported V4L2 control encountered: ctrl_id = 0x009A0901, name = 'Exposure, Auto'
[libwebcam] Unsupported V4L2_CID_EXPOSURE_AUTO control with a non-contiguous
range of choice IDs found
[libwebcam] Invalid or unsupported V4L2 control encountered: ctrl_id = 0x009A0901, name = 'Exposure, Auto'
编辑:
摄像头是 Logitech HD Pro Webcam C920
并且正在运行:
uvcdynctrl --device=/dev/video1 --clist
给出输出:
[libwebcam] Unsupported V4L2_CID_EXPOSURE_AUTO control with a non-contiguous
range of choice IDs found
[libwebcam] Invalid or unsupported V4L2 control encountered: ctrl_id = 0x009A0901, name = 'Exposure, Auto'
[libwebcam] Unsupported V4L2_CID_EXPOSURE_AUTO control with a non-contiguous
range of choice IDs found
[libwebcam] Invalid or unsupported V4L2 control encountered: ctrl_id = 0x009A0901, name = 'Exposure, Auto'
Listing available controls for device /dev/video1:
Brightness
Contrast
Saturation
White Balance Temperature, Auto
Gain
Power Line Frequency
White Balance Temperature
Sharpness
Backlight Compensation
Exposure (Absolute)
Exposure, Auto Priority
Pan (Absolute)
Tilt (Absolute)
Focus (absolute)
Focus, Auto
Zoom, Absolute
最佳答案
执行这个
sudo apt-get install v4l-utils
在 python 中
os.system('v4l2-ctl -d 0 -c focus_auto=0')
os.system('v4l2-ctl -d 0 -c focus_absolute=250')
关于python - 有没有办法在 pygame 中控制网络摄像头的焦点?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/13407859/