Hak5 - Using Screen in Linux, Motion Detection Webcam Software, and QT Interface Design

This time on the show Darren shares a heartwarming story about how a little plastic minifig saved the day using the Linux screen command. Shannon demos her favorite webcam software's motion detection features, and Jason introduces interface design using the QT SDK.

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Closed Caption:

wat group
this time on the show the wonderful
world of screen
motion detecting webcam software and
interface design using the Qt SDK
all that more this time on Act five on
you me
this episode up at five is brought to
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hello look now at five men used a
kitchen is your weekly dose a technology
never called them second i just want to
see in bed in their your shoes on my
feet see
yoshi when tonya I guess not
the ratio pS This Week on Shannon Jason
here totally help me because I could not
from this show so today
but pls that's what's going on sir
Jason's
tunes more fun STK stuff films my
application
goodness with Q and shannon's checking
out some
misty software for Windows and I figured
I'll weekends Munich stuff since
like I don't feel like leaving my bed
right now solar stock units
back
other regis story that sounds like fun
every just a right
ok I'm
now our story begins as many do in a
small town of blocks & Betts
not too unlike Los Angeles to Miami the
spirit as a plastic is home to the
obligatory UNIX key
here comes our protagonist now well
mister many flag
have to work at sea as you get a
briefcase in a perma smile and something
resembling a smart car
a convenient not like many UNIX kik
many pig here loves to work in terminals
so when he arrives at the office
of getting a cup copy of course he fires
up an SSH sessions one the various
services to work
and everything is going fine socking
away and call terminal 9000
when suddenly is green goes completely
blank
it turns out someone figured that they
go ahead try to cook a pizza
by placing it on the company satellite
dish in those kicking off the internet
connection
no matter the fire department little not
much else to do in this at a time so
his remove moments but
well many fag he reconnects and is
greeted with a blank
bash prompt not the e-maxx terminal the
adlai column is work going on and
it's all of us could have been
alleviated to by using the command
screen
not screen the essentially a terminal
multiplexer think that is like tabs in
Firefox
up for Unix shells you need a graphical
environment s it worked just fine
now it may figure 2a. first run the
command screen after logging and
who have been greeted by another UNIX
prompt and from there you can work
all day long and if you were
disconnected from the machine
all you have to do then reconnects is
reactivate
that screen session and all his work
would be there inside a bit
not to list all in the running screen
sessions on a machine
it type screen attack LS and to
reconnect to a screen session they've
previously run
type screen tak are and then the number
of the screen session
now there's only one screen session
running typically just a single tax are
will suffice
and this is great not only for just you
know connection troubles
but situations we'd like to maintain
sessions across multiple devices
like for example if many figure running
a report on his desktop at work
then he could ask says the same session
from the SSH client as smartphones like
on the bus
and from their their like three other
you plans for cuts they should probably
be aware that will bite
below many things low brick brain and
make him so much more
Lee and productivity yes that's a word
personal all you hold down Control and a
release them and press see and that will
create
a new screen window a few well so if
you're doing like
I just some stuff to Iran top and then
you're like aw yeah and then hit control
AC
be at a blank palms or Papa still
running in a different window
you now in a new tab how to get back to
the previous tab
control a let go and then hit p for
previous
and control I let go and hit and for
next
you can the control AC to create as many
windows as you'd like
and use and NP to go back and forth
between the mall and then
all of those will stay in sync between
your laptop and desktop
your smartphone and wherever you want to
connect CQB toll here so whether you're
working from home on the bus on the wifi
in the sky
you can be shared a little command
screen
and then it's just the princess and she
turned into a frog in the lib
happily ever after that's
that's my that's my story for you guys
today okay
I N a drink another billion gallons %uh
orange juice
and it's more chicken noodle soup and
then like all
like under these covers so also you guys
next week gennady block those previously
reported with Shannon
back boroughs sec okay
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browser market share and the answer is
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have also used in a situation where a
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there's one thing that's always been
really important for me and that's
my house and my safety and making sure
that you know not to my stuff gets
stolen I'm like super conscious about it
and I make sure to lock my door all the
time
but you know stuff can happen and I want
to make sure that I know
when I'm away that nothing's happening
to my health called
what leaders webcams that are available
in their software available that make it
a lot easier for people like me who like
to travel a lot
to keep track of what's going on in our
house and actually see it
Lake life and this going down its
whatever viewers he emailed this
software to S
it's called y'all cam and you can
download it over at ya cam dot com
rate here no cam is written by Magnus
lund ball
and it stands for yet and never another
webcam
software yeah yet another webcam
software right now
it's free but you can make a donation
and it's available only for Windows
yeah I now I'm sorry and it stands out
because
well to me has a whole bunch really cool
features so all the features include
video streaming so you can
you know stream online too whoever you
want to
it has image snapshots it has a built-in
web server and motion detection which is
call an FTP uploads you can upload
photos or images
you know anything you want online to
whatever site
you want to has text in image: overlays
password protection for your video
streaming online announcements for any
kind a webcam communities that you're
part of
you can schedule for your webcam to be
online at certain times on certain days
and you can also choose your language
alright so I wanted to show you a quick
demo of how it works you can download
this over at York and dot com
and once you have it downloaded you just
open it up
when you get this nifty little main
window now holds all this stuff and it
all has
little you no stop signs next time and
the stop signs mean that everything is
disabled right now
so the first thing on the list is file
and that basically just lets you save
images onto local computer which would
be for me
this computer yet the second thing is
FTP uploads
for an FTP server see you can upload you
know all your photos to an FTP server
wherever you want
HTTP can start a stream of the webcam
images
the stream lets you start a stream a
video images and then
motion obviously is for motion detection
appear under your toolbar first this
file that has all the same stuff
and then you have images to movie now
images to movie
I don't know if I would ever use that
but it basically just converts images
into a movie
and then you can choose this to upload
images into a video file that you can
play in Quicktime
under the View tab you can have access
to view the control panel tab for the
Consul tab or you can click on right
there
you can always have it on top or you can
hide everything at startup
if you had in startup that means that
the window is to not start up as well as
the tray icon
and then I can also hide now and then I
would have to go find it down here
under settings where you can detect your
webcam and if it doesn't
always detect your webcam you can always
go to Device
then changed to you and she was your
webcam and then it'll change the name on
there right here in the parentheses
also at its enemies this is where all
your settings
take place this lets you do everything
from changing your language camera your
connections
Xterra so file output takes a photo in
season to a local computer at a given
interval
so for example I can choose Jay pag
savory there and then I can choose that
the image quality so I can choose that
up and down
how many seconds to take in the image
you're a wizard
next is the FTP output that uploads
images to an FTP your choice
at certain intervals again stage use it
and then you put in your user name in
the directory
the file name that you want it to be
called and how many seconds every time
under http is the output that lets you
view images on a dedicated webpage
and then stream let you stream your
video online
so under stream you have these
additional settings right here
maximum connections I'm gonna change
mine 22
you can do your daily limit time limit
you can play a sound alert
everytime a Bee or connects and then you
had your page designer so I'm gonna type
in
pack 5 snubs and for the heading of
welcome and it says that I need to
enable it for its work so I hate yes
and you can preview it now I did set it
up earlier to have a password so I put
that in
nato now if you don't use the page
designer you can also edit the HTML
template files if you want more
functionality
and then this is called so underpass
where you can choose
for your users that decide to view your
webcam
you can choose what kinda username and
password that they have to have one
every day go on to view your webcam
and last but not least we have this
scheduler
yep to enable the scheduler at first and
then you can choose
what times you have certain things start
up at on certain days
so for this one I'm going to do the
FileUpload
and I'm gonna choose to have pictures
uploaded on Monday Tuesday and Wednesday
now I'll go ahead and disable that and I
also wanted to show you motion detection
which is
really cool social window over here
shows you what kinda motion detection is
going on
and then if it ever triggers the motion
detector to take a picture every 30
seconds or whatever let you have it at
it'll take a photo and then tell you
what percentage of the screen
was having a motion under actions you
can save a file to any certain path
you can upload photos to an FTP site 2 F
an FTP server
you can run to da txt me play any kind
of sound that you want
or you can send yourself an email with
the photo attached
okay so nifty software you can hide it
whenever you're not at home so people
can see that it's protecting their
motion
who you can make it take pictures and
emailing to you when you're away from
home you can it
choose to stream the video online all
these
I really like and I can I can't do all
right now with my webcam at home cuz I
don't have the software for it but
I like your cam although I know there's
other software out there that does the
exact same
same kind of stuff cell if you know
about those
send them to me because I do wanna find
the best one for myself
expecially when I'm traveling abroad
like a recently did
Italy I didn't know what was going on at
home the entire time and I would've
loved to have the software back then
so email me what you think over at
feedback heck 5.0 court
and we'll be right back afterward from
our sponsor
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when a chance to win a newfound how
about a quarter million dollars
Nokia AT&T have launched the ten million
dollars calling all innovators
North America contest challenging mobile
after developers in game developers to
create the next level about
for the Nokia n8 Ovi Store few new Nokia
Qt SDK
the contest will have two phases and
when it was selected by
outperform is near the store by a panel
of judges
to winners will receive Nokia devices
cash prizes up to two hundred fifty
thousand dollars
and potentially even inclusion and 1.9
million dollar marketing campaign for
their apt
tell over the next few weeks we're going
to be running down the in the house
on the Nokia Qt SDK show you how to get
started
developing for Nokia Symbian devices and
this week
gonna show you how to get started with
that STK so last week we cover the ins
and outs
the cute SDK and you know how to set up
how to get going
and this week I thought I'd cover the
basic first to run application just get
you started
so that we can work on a long-term
project throughout this series
I love the II time-lapse camera so
what start right into this let's go
ahead look at the UI file after you
create a new project
from last week so in you I file
it's pretty straight forward to drop the
vertical layout
into this so that we can set the main
layout to grade
so once it's in a great things will snap
and go to expand the entire with the
item
so that your dues were gonna add great
vertical way out first
to be the speaker to allow room for the
camera you later
and you already do is put uncle spacer
it
that we're gonna do is put a horse on a
layout right underneath that
put a spacer a button a TextView
or should be a label another bottom and
another spacer
this will allow it to just take the
entire with and
be able to fit and look nice just like
this so
all our label I went ahead and filled it
with some
just simple tax in 15 seconds and
didn't set the text on the buttons one
from cost one minus this will allow us
to set the duration in between the
pictures that are really taken
but what he said were cover all that
next week
this week we're just gonna set up the
basic UI here let's go ahead dive
straight
into the code so in the code word open
the main window dots Eden
she may 10 th going to clear some stuff
first were needed under private were
gonna is a clear second variable
it will just maintain how many seconds
in between the images captured
then we really need to give out for the
entire
new block where did you a private slots:
these are essentially slots for when the
signals come in
it says hey you know where do I go your
tie them together later it's it's
basically say
on click what do I call so
what's to clear the slots the slots
being a
void because after return typeof this
its avoid
Inc count and deck out for just
incrementing and decorating accounts
really straightforward really simple
then we're heading to the
may not see pp first thing or need to do
is
did a clear and initial value on not
really necessary just got to do.
I seconds equals 15
once you've done that go ahead and down
and set the tax
all the label in order to access it its
you why
and then the point over to the label
that's what label was born that way we
call
that the bay default name on the label
inside the UI file
and then is the function set tax aureus
cue string which provides a whole lot
just regulation libraries in this case
converted enter
sure to a sec and then append second to
it that should be the context for
content for label
then we're gonna do is connect the
singles what's
back were to connect the push button 1
which is the first push button plus one
click
go ahead and set
where who wants can be called this is
gonna be calling the main window
and then the slot create cap you push to
close
gets larger that were you the exact same
thing for the second button
second button you know is just on click
Dec then we're going to find weekend Dec
so void main window
internet Inc count seconds plus possibly
cramped the second by one
and then set the tax exact same thing
except for documenting my one
pretty easy nice simple George go ahead
hit the big green training green button
here
I once quipped that its gonna ride
its a I'm released report really simple
and
there you have it it plus yet the minus
works great I next week we're gonna be
covering
more on this we recovered more in depth
or using the camera
we really get into this and finishing
this time-lapse application time off
camera application
up you know for any more questions US
have on this head on over to forms
at Nokia forms dot Nokia dot com or
any questions specifically on the
segment you know me Jason
Act five dialer the Nokia Qt SDK brings
the popular cue creator I D E from the
desktop and embedded world
to mobile application developers
enabling them to build native app for
the Symbian three devices
like the Nokia n8 developers can submit
their ass by january twenty-eighth
be involved to thank you so much for
Nokia for sponsoring this up set up at
five
but that's a wrap up this episode in
fact 5 0
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with though we need a fan is bad rush
and lots first we have Technol s photo
of the week
from waco ok waco who made this
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crack five I had checked out there is so
cool thanks for sending headed
those periods yeah yet thank you yeah
rights and I have stuff your photos to
feedback I have 5.0 org
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there's this thing called Charity Water
you might have heard of it somewhere
we talk about last week all the shows on
me we're doing and we thought that we
tell you about it again because it's
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yeah that he has no clean water its its
such a important resources scares and
and you know we need it driving and
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out to the party started yeah i thought
id let's go ahead now bring some clean
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you can go ahead and help us out yeah
I have to do is go over to revision 3.0
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yes okay guys that were on our way to 5
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I hope you guys well doesn't realize it
satan yeah
Josh Morris thank you John Rowe schemes
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parent in Derek Haley anonymous in
altering kitchen boo and you so it any
yeah
so I think that just now wraps up this
episode I'm
of course from you can also email
feedback i've got word
or anything related to the stuff you've
seen here on today's show K question to
get suggestions for what you would like
to see on the show
we'd love to hear I hadn't try to keep
it short going to be the most
all
and until next week my name is Shannon
Morris wife's name is Jerry temperature
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