我正在用 Python 开发一个应用程序来控制兼容 ONVIF 的相机。
软件：Debian Wheezy、Python 2.7、Quatanium python-onvif 客户端
硬件：Raspberry Pi 2 B、本地路由器上的 IP 摄像头、用于开发的 wifi/VNC
所需的 PTZ 功能包括绝对移动、相对移动、连续移动、停止和使用预设位置。使用下面提取的测试代码，除了绝对和相对移动之外，我已经完成了所有这些工作。所有这些代码都执行没有任何错误，但相机不会移动绝对或相对移动。我希望有人可以提出这两个功能的问题。该示例有点长，但我尝试包含足够的代码来显示工作和非工作（带有大写注释）部分之间的对比，以供参考和测试。
测试草图：
#!/usr/bin/python
#-------------------------------------------------------------------------------
#Test of Python and Quatanium Python-ONVIF with NETCAT camera PT-PTZ2087
#ONVIF Client implementation is in Python
#For IP control of PTZ, the camera should be compliant with ONVIF Profile S
#The PTZ2087 reports it is ONVIF 2.04 but is actually 2.4 (Netcat said text not changed after upgrade)
#------------------------------------------------------------------------------
import onvifconfig
if __name__ == '__main__':
#Do all setup initializations
ptz = onvifconfig.ptzcam()
#*****************************************************************************
# IP camera motion tests
#*****************************************************************************
print 'Starting tests...'
#Set preset
ptz.move_pan(1.0, 1) #move to a new home position
ptz.set_preset('home')
# move right -- (velocity, duration of move)
ptz.move_pan(1.0, 2)
# move left
ptz.move_pan(-1.0, 2)
# move down
ptz.move_tilt(-1.0, 2)
# Move up
ptz.move_tilt(1.0, 2)
# zoom in
ptz.zoom(8.0, 2)
# zoom out
ptz.zoom(-8.0, 2)
#Absolute pan-tilt (pan position, tilt position, velocity)
#DOES NOT RESULT IN CAMERA MOVEMENT
ptz.move_abspantilt(-1.0, 1.0, 1.0)
ptz.move_abspantilt(1.0, -1.0, 1.0)
#Relative move (pan increment, tilt increment, velocity)
#DOES NOT RESULT IN CAMERA MOVEMENT
ptz.move_relative(0.5, 0.5, 8.0)
#Get presets
ptz.get_preset()
#Go back to preset
ptz.goto_preset('home')
exit()
引用的类：
#*****************************************************************************
#IP Camera control
#Control methods:
# rtsp video streaming via OpenCV for frame capture
# ONVIF for PTZ control
# ONVIF for setup selections
#
# Starting point for this code was from:
# https://github.com/quatanium/python-onvif
#*****************************************************************************
import sys
sys.path.append('/usr/local/lib/python2.7/dist-packages/onvif')
from onvif import ONVIFCamera
from time import sleep
class ptzcam():
def __init__(self):
print 'IP camera initialization'
#Several cameras that have been tried -------------------------------------
#Netcat camera (on my local network) Port 8899
self.mycam = ONVIFCamera('192.168.1.10', 8899, 'admin', 'admin', '/etc/onvif/wsdl/')
#This is a demo camera that anyone can use for testing
#Toshiba IKS-WP816R
#self.mycam = ONVIFCamera('67.137.21.190', 80, 'toshiba', 'security', '/etc/onvif/wsdl/')
print 'Connected to ONVIF camera'
# Create media service object
self.media = self.mycam.create_media_service()
print 'Created media service object'
print
# Get target profile
self.media_profile = self.media.GetProfiles()[0]
# Use the first profile and Profiles have at least one
token = self.media_profile._token
#PTZ controls -------------------------------------------------------------
print
# Create ptz service object
print 'Creating PTZ object'
self.ptz = self.mycam.create_ptz_service()
print 'Created PTZ service object'
print
#Get available PTZ services
request = self.ptz.create_type('GetServiceCapabilities')
Service_Capabilities = self.ptz.GetServiceCapabilities(request)
print 'PTZ service capabilities:'
print Service_Capabilities
print
#Get PTZ status
status = self.ptz.GetStatus({'ProfileToken':token})
print 'PTZ status:'
print status
print 'Pan position:', status.Position.PanTilt._x
print 'Tilt position:', status.Position.PanTilt._y
print 'Zoom position:', status.Position.Zoom._x
print 'Pan/Tilt Moving?:', status.MoveStatus.PanTilt
print
# Get PTZ configuration options for getting option ranges
request = self.ptz.create_type('GetConfigurationOptions')
request.ConfigurationToken = self.media_profile.PTZConfiguration._token
ptz_configuration_options = self.ptz.GetConfigurationOptions(request)
print 'PTZ configuration options:'
print ptz_configuration_options
print
self.requestc = self.ptz.create_type('ContinuousMove')
self.requestc.ProfileToken = self.media_profile._token
self.requesta = self.ptz.create_type('AbsoluteMove')
self.requesta.ProfileToken = self.media_profile._token
print 'Absolute move options'
print self.requesta
print
self.requestr = self.ptz.create_type('RelativeMove')
self.requestr.ProfileToken = self.media_profile._token
print 'Relative move options'
print self.requestr
print
self.requests = self.ptz.create_type('Stop')
self.requests.ProfileToken = self.media_profile._token
self.requestp = self.ptz.create_type('SetPreset')
self.requestp.ProfileToken = self.media_profile._token
self.requestg = self.ptz.create_type('GotoPreset')
self.requestg.ProfileToken = self.media_profile._token
print 'Initial PTZ stop'
print
self.stop()
#Stop pan, tilt and zoom
def stop(self):
self.requests.PanTilt = True
self.requests.Zoom = True
print 'Stop:'
#print self.requests
print
self.ptz.Stop(self.requests)
print 'Stopped'
#Continuous move functions
def perform_move(self, timeout):
# Start continuous move
ret = self.ptz.ContinuousMove(self.requestc)
print 'Continuous move completed', ret
# Wait a certain time
sleep(timeout)
# Stop continuous move
self.stop()
sleep(2)
print
def move_tilt(self, velocity, timeout):
print 'Move tilt...', velocity
self.requestc.Velocity.PanTilt._x = 0.0
self.requestc.Velocity.PanTilt._y = velocity
self.perform_move(timeout)
def move_pan(self, velocity, timeout):
print 'Move pan...', velocity
self.requestc.Velocity.PanTilt._x = velocity
self.requestc.Velocity.PanTilt._y = 0.0
self.perform_move(timeout)
def zoom(self, velocity, timeout):
print 'Zoom...', velocity
self.requestc.Velocity.Zoom._x = velocity
self.perform_move(timeout)
#Absolute move functions --NO ERRORS BUT CAMERA DOES NOT MOVE
def move_abspantilt(self, pan, tilt, velocity):
self.requesta.Position.PanTilt._x = pan
self.requesta.Position.PanTilt._y = tilt
self.requesta.Speed.PanTilt._x = velocity
self.requesta.Speed.PanTilt._y = velocity
print 'Absolute move to:', self.requesta.Position
print 'Absolute speed:',self.requesta.Speed
ret = self.ptz.AbsoluteMove(self.requesta)
print 'Absolute move pan-tilt requested:', pan, tilt, velocity
sleep(2.0)
print 'Absolute move completed', ret
print
#Relative move functions --NO ERRORS BUT CAMERA DOES NOT MOVE
def move_relative(self, pan, tilt, velocity):
self.requestr.Translation.PanTilt._x = pan
self.requestr.Translation.PanTilt._y = tilt
self.requestr.Speed.PanTilt._x = velocity
ret = self.requestr.Speed.PanTilt._y = velocity
self.ptz.RelativeMove(self.requestr)
print 'Relative move pan-tilt', pan, tilt, velocity
sleep(2.0)
print 'Relative move completed', ret
print
#Sets preset set, query and and go to
def set_preset(self, name):
self.requestp.PresetName = name
self.requestp.PresetToken = '1'
self.preset = self.ptz.SetPreset(self.requestp) #returns the PresetToken
print 'Set Preset:'
print self.preset
print
def get_preset(self):
self.ptzPresetsList = self.ptz.GetPresets(self.requestc)
print 'Got preset:'
print self.ptzPresetsList[0]
print
def goto_preset(self, name):
self.requestg.PresetToken = '1'
self.ptz.GotoPreset(self.requestg)
print 'Going to Preset:'
print name
print
@Ottavio，抱歉，我没有明确说明我用于此测试的摄像机是 Netcat PT-PTZ2084XM-A 通过 ONVIF 查询报告的，它确实支持绝对和相对移动。我随后通过 onvif.org 网站验证了这款相机尚未经过测试和验证符合 onvif 标准。我还验证了上述代码在 Amcrest IP2M-841B ptz 摄像机上可以正常工作。所有这一切的结果是永远不要相信相机未经测试就兼容 ONVIF 2.x 的说法。即使是 Amcrest 也存在用于缩放的 ONVIF 和 cgi 命令的问题。Netcat 和 Amcrest 对解决这些技术问题都没有太大帮助。