Re: Vu-meter
Re: Vu-meter
- Subject: Re: Vu-meter
- From: Todd Freese <email@hidden>
- Date: Tue, 2 Aug 2005 13:49:51 -0500
I believe so but I have not tried it yet. If you are using any of the
cool Audio Units calls, then you will be tied to Tiger and above.
Maybe someone else can clarify this.
In addition, there is some very nice and clean Gestalt check code for
QT7 in WhackTVController.m.
Todd
On Aug 2, 2005, at 12:41 PM, Philip Dow wrote:
Brilliant!
Makes sense that I would need to retain the object, as it's
obviously not blocking the current thread when it loads. Still,
would be nice if the docs explicitly mentioned that. That explains
the very short scratch I was hearing, the first bytes of the moving
playing before it was released.
One last question. Everywhere in the QTKit header docs, it says OS
10.4 or higher. However, in the introduction of the QuickTime Kit
Programming Guide, it says "The QuickTime Kit framework is
available in Mac OS X v10.4 and later. The framework also supports
applications running in Mac OS X v10.3, but requires QuickTime 7 or
later."
This means that QTKit framework calls *will* run on 10.3 as long as
quicktime 7 is installed, right?
-Phil
http://phildow.net
Am 02.08.2005 um 19:14 schrieb Todd Freese:
I have not run into this. However, there is something in this
QTKit FAQ:
http://developer.apple.com/technotes/tn2005/tn2138.html
Check out the first issue.
Todd
On Aug 2, 2005, at 11:38 AM, Philip Dow wrote:
Check out Apples WhackedTV example. It has a VU meter example in
it.
Todd Freese
The Filmworkers Club
Todd. Thanks for this link. I've been looking for ages for a vu
meter example that I could understand. Last night I downloaded
the code and hacked my way through it, managing to incorporate
the vu meter and other audio settings options into my app. I've
run into a problem though.
I can sample incoming audio and write it to disk as a movie. I
can preview this movie in finder and I can load it in quicktime
without any problems, so I know it's a valid movie. However, when
I try to load the file into QTKit's QTMovie and either play it or
export the audio as an aiff, I run into problems. The movie seems
to load, but I can't do anything with it. Any experience with this?
-Phil
Am 01.08.2005 um 23:20 schrieb Todd Freese:
On Aug 1, 2005, at 3:51 PM, Sanri Parov wrote:
On Mon, 01 Aug 2005 16:26:49 -0400, Douglas A. Welton wrote:
I think that NSLevelIndicator be a better choice for what you
are trying to
accomplish... or you can easily drawn your own using the
QuickTime functions
for metering sound levels and frequencies.
Hmmm... NSLevelIndicator? I can't find it out on 10.3.9.
Maybe is just in Tiger?
BTW, do you please have any kinda clue on using the QuickTime
functions
you sayd?
I haven't ever coded anything on QT and I just need a snippet
of code
(even in the public domain) or something really illuminating.
Thanks again
--
Sanri Parov
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