Re: NSMovie playback cutout
Re: NSMovie playback cutout
- Subject: Re: NSMovie playback cutout
- From: Greg Hamilton <email@hidden>
- Date: Wed, 26 Feb 2003 09:46:09 +1100
Once the new version is working with Jaguar and has been tested at a
few gigs I'll post the software somewhere. Source and binary. It's not
the best code. I need to learn more about Cocoa and Objective C. I have
a feeling I'm doing a few things the hard way.
I'll make a note of your email address and let you know when it's
ready. It should be ready soon as it's required for a gig next weekend.
Previewing could be a little tricky. To listen to two tracks but only
send one to the live output would require having two audio outputs. We
use an iBook at gigs. I suppose if we attached an external USB audio
device (eg. a Griffin iMic) we could preview on the iMic and send the
built in line-out to the PA. I don't know if it's possible to select
the audio output device for an individual Quicktime movie. Also, cross
fading would be pretty much out of the question unless I did something
really hopeless like play the sound to both devices and fade the volume
up on one and down on the other. This is more of a Core Audio job. I
chose to use Quicktime because it knows how to decode mp3, aiff, etc.
Greg Hamilton
On Tuesday, February 25, 2003, at 10:22 PM, MAD DANO MADMAD wrote:
do u make that open source?
i need something xactly like that, espaecially id like to have a
prelisten, so i mean a second audio channel i can assign a file to
thats not one the live channel, so i can prehear my crossfades or at
least get an idea. can i see the project?
daniel
Am Dienstag, 25.02.03 um 09:50 Uhr schrieb Greg Hamilton:
Hi,
I've tried directing this question to the Quicktime API mailing list
a few times with no luck.
The first Cocoa app I wrote was a simple app for a DJ friend of mine.
It plays multiple audio files and lets him cross fade b/w them. I use
an NSMovie instance for each file I'm playing.
Before installing Jaguar the software worked. Now when I start
playing a new file the other files tend to stop. They can be
restarted but this in turn causes other files to stop. Also, when I
display the file dialog to select new files to add to the playlist
the audio pauses and doesn't restart until I dismiss the dialog box.
I suspect there has been a change in a default setting in the
Quicktime API. In the QuickTime Player app preferences there is a
checkbox to select 'Play sound in frontmost player only'. There's
probably a Quicktime API function to toggle this setting for a movie.
I've spent a long time reading the Quicktime 6 API reference which I
downloaded as a PDF from the Apple web site. I can't find any
functions that hint at setting something like this for a movie.
To eliminate the possibility that my own bogus code is to blame I've
written a very simple test app that just allocates two NSMovies and
tries playing them at the same. The same thing happens. One or other
always cuts out after a few seconds.
Has anybody had a similar problem ? This is really frustrating.
Greg Hamilton
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