Brtdku

I have a python script on a raspberry that take a picture, when I run it with putty foo.jpg is indeed created.

However when I run it using paramiko foo.jpg is not created, but the script run as expected (it prints 'foo.jpg captured').

class RemoteServer():

    def __init__(self, ip, port, username, password):

        self.ip = ip

        self.port = port

        self.username = username

        self.password = password



class RemoteHelper():

    def __init__(self, paramiko_ssh_object):

        self.ssh = paramiko_ssh_object



    def waitForExecCommandEnd(self, channel, command):

        """

        Block untill the end of a command executed by Paramiko.ssh.exec_command

            -channel : (channel) channel stdout returned by Paramiko.ssh.exec_command

            -command : (string) command to run

        """

        while not channel.exit_status_ready():

            print "Waiting for end of {}".format(command)

            time.sleep(1)



    def runRemoteCommand(self, command):

        """

        Run a command on the remote server via ssh and block until it ends

            -command : (string) command to run

        """

        print "running {}".format(command)

        a, stdout, stderr = self.ssh.exec_command(command)

        self.waitForExecCommandEnd(stdout.channel, command)

        for line in stdout.readlines():

            print line

        for line in stderr.readlines():

            print li



def authentificate(ssh, rpi):

    ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

    print "Connection a %s:%s user=%s mdp=XXXXXXXXX" % (rpi.ip, rpi.port, rpi.username)

    ssh.connect(rpi.ip, port=rpi.port, username=rpi.username, password=rpi.password)



rpi = RemoteServer("192.168.1.20", 22, "pi", "raspberry")

ssh = paramiko.SSHClient()

authentificate(ssh, rpi)

remoteHelper = RemoteHelper(ssh)

remoteHelper.runRemoteCommand("sudo python /home/pi/camera/pictaker.py")

And here is the script on the RPI:

#!/usr/bin/env python

# --*-- encoding: utf-8 --*--



from time import sleep

from picamera import PiCamera



#camera conf

camera = PiCamera()

camera.resolution = (2592, 1944)

camera.vflip = True

camera.framerate = 5



#camera warmpup

print "preparing camera"

camera.start_preview()

sleep(2)



#taking pic

camera.capture('foo.jpg')

print "foo.jpg captured"

camera.close()

would it be due to some unix permissions?

Thanks.

Try:

1) print(camera.capture('foo.jpg') to see if it return 0

2) try to change 'foo.jpg' to '/tmp/foo.jpg', maybe it capture image but save it to same other path and you don't know where

Edit:

3) you can try, but it's not so trivial as above, run sudo strace -f -o /tmp/strace.out . Then you will see is there any 'permission denied' or something else