More iSight Video Tricks
by Derrick Story
09/23/2003
One by one your iChat buddies have turned off video access and are back
to chatting by audio or text. That's fine, even normal. Video conferencing
is designed for special occasions, not everyday use. Even the Jetsons
disabled the picture phone every now and then.
But when you're not video conferencing, you still have a powerful
camera perched atop your Mac. Yes, it's pretty to look at. But it's also
oozing with capability. I first touched on this in a weblog entry titled,
Want to Do More with the
iSight than Chat?, where I explained how EvoCam software really
expands the iSight's capabilities. Then, in the article, Making
Movies with the Apple iSight, I showed you how to configure Apple's QuickTime
Broadcaster to capture video from your iSight and save it to your hard
drive. Broadcaster is a cool application, and it's free. But it's not the
perfect tool for local video capture.
Many people have said to me that they found Broadcaster's interface
confusing and difficult to configure. Also, we've all discovered together
that there's a minor incompatibility with the iSight's internal microphone
and the Broadcaster software. When you use the iSight's builtin mic for
audio capture, the audio and video tend to get out of sync. To overcome
this drawback, I began testing alternatives to Broadcaster that still
tapped the iSight's movie making abilities, but with fewer
headaches. Today I'm going to show you two of my favorites, iRecordNow and
BTV, plus a very cool piece of software called SecuritySpy.
Along the way you'll discover that these applications include some new
tricks: time lapse photography, motion detection, and surveillance. So
fire up your iSight, turn off iChat AV, and let's see what kind of stuff
we can make.
iRecordNow Designed Specifically for the iSight
The creative minds over at Bonix Software have released a nifty
application called iRecordNow
that's the model of simplicity when it comes to turning your iSight into a
video camcorder. I think this software is particularly good if you've
become frustrated with QuickTime Broadcaster and want an easier way to
capture video.
Since the development of this app is still in progress, you can
download it now and request a free license that will be valid until the
1.0 version is released.
The software is very easy to use. Plug in your iSight and turn it
on. (iChat AV will launch as soon as you turn on your iSight. I recommend
that you quit iChat while recording movies to disk.) Now launch
iRecordNow, and you'll recognize that the interface sports the high tech
metal pattern found on the barrel of the iSight. Initially, it may feel
like that you don't have any controls other than the red record
button. But that's not the case as you'll see here quickly. But first,
let's get a video clip under your belt, then we'll explore a few of the
options.
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The iRecordNow interface is the model of simplicity.
Just hit the record button and suddenly your iSight
is a 30 fps video camcorder.
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Start by clicking the record button and watching the video as it is
captured in the preview window. Once you stop, iRecordNow will save your
capture as a QuickTime file. Currently the default settings are
Component Video - CCIR-601 at millions of colors and single
channel uncompressed audio at 16 bits, 48 kHz. I think these settings
are a good choice for your "master video", enabling you to later export
compressed versions for other uses in QuickTime Pro. (Remember to never
overwrite your master file with a compressed version.)
Now, about those additional settings... If you want to make a few A/V
adjustments, you simple open the Camera Controls drawer (see the button on
left side of interface?) to reveal a handful of useful settings.
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You have basic image and sound adjustments in the side-opening
drawer.
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You'll notice that in the free "preview version" of iRecordNow you
don't have the option to select your audio source. There's a workaround
for that. First, quit the application. Then open your Sound Preferences
panel, click on the Input tab, and choose the source you want. You can use
the internal mic on your Mac (argh!), the iSight's builtin mic (not bad),
or an external mic going through the Griffin iMic (best). Now relaunch
iRecordNow and it will use your selected audio source.
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If you want to change audio sources, simply quit iRecordNow
and choose a different source in your Sound Preferences
panel.
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QuickTime Broadcaster users will be happy to hear that iRecordNow
remedies an audio bug that causes "out of sync" audio when using the
iSight's internal mic. After many tests with iRecordNow, I didn't
experience any of those syncing problems at all, regardless of which audio
input source I used.
iRecordNow provides you with the option to capture video at 320 x 240
or 640 x 480. At the moment, your only frame rate option is 30fps, but I
suspect that will change with the final release. One of the things that
impressed me was the quality of the capture. The overall image is crisp
and clean, and the video is smooth. iRecordNow also doesn't seem to tax my
667 Mhz TiBook the way that QuickTime Broadcaster does.
Tip! Capture "Tracking" Footage with iRecord Now
So now that you have iRecordNow configured and ready to shoot, what can
you do that's interesting beyond the standard "talking head" shot? Try
putting your camera on the move with what's known as a "tracking"
shot.
Put your laptop with iSight attached on an office chair that has wheels
and compose your shot. Once you start recording, slowly push the chair
along side a subject on the move, such as a walking toddler, or roll the
chair toward a stationary subject such as two people talking. (This can
become your substitute for a zoom lens!)
Since the iSight is an autofocus camera, it should be able to keep the
image nice and sharp as your roll along. Review your footage, make the
necessary adjustments, and shoot another take. Hollywood has been using
the tracking shot for years to add visual interest to movie projects.