Forums > Jitter

routing audio from jit.qt.movie

March 17, 2007 | 5:31 pm

Hi all!

I need to process the audio from a qt player i did, but i don’t know how to route the audio signal…

Please, help me!!!!

Thx!


March 17, 2007 | 5:37 pm

>Hi all!
>
>I need to process the audio from a qt player i did, but i don’t know
>how to route the audio signal…

Tutorial 27. Read it.


on the floor there’s a long wooden table/on the table there’s an open book/
on the page there’s a detailed drawing/and on the drawing is the name I took
Gregory Taylor http://www.rtqe.net


March 17, 2007 | 6:00 pm

>>Hi all!
>>
>>I need to process the audio from a qt player i did, but i don’t
>>know how to route the audio signal…
>
>
>Tutorial 27. Read it.
>
>–

only trouble being that tutorial 27 does not work (I send a message
about it this morning)

best

kasper

Kasper T. Toeplitz
noise, composition, bass, computer

http://www.sleazeArt.com

http://www.myspace.com/sleazeart


March 17, 2007 | 6:09 pm

On Mar 17, 2007, at 11:00 AM, Kasper T Toeplitz wrote:

>
> only trouble being that tutorial 27 does not work (I send a message
> about it this morning)

QT 7 requires Jitter 1.6 or higher for spigot~ to function. Otherwise
you will need to use QT 6.5.X or earlier (which is not recommended
under Tiger). Search archives for more info.

-Joshua


March 17, 2007 | 6:09 pm

>only trouble being that tutorial 27 does not work (I send a message
>about it this morning)

Hey. You’re the one running old copies of Max….

on the floor there’s a long wooden table/on the table there’s an open book/
on the page there’s a detailed drawing/and on the drawing is the name I took
Gregory Taylor http://www.rtqe.net


March 17, 2007 | 6:21 pm

>>only trouble being that tutorial 27 does not work (I send a message
>>about it this morning)
>
>Hey. You’re the one running old copies of Max….
>–
yes

at least it gives me a reason to move to max 4.6/ jitter 1.6

thanks

kasper


March 17, 2007 | 6:27 pm

Spigot only seems to work for audio from movies for me. I cannot get it to work for mp3′s. I’m running 4.6.2 max and 1.6.2 Jitter on osx 10.3.9.
Any ideas?

Thanks
Chris


March 17, 2007 | 11:31 pm

Import the movie in a buffer~ and in a qt.movie simultaeously, set the rate of the qt.movie to 0 and use time messages to sync the movie to the playhead you use to play the buffer~

I remember posting examples of that approach on this forum before..

Mattijs

Quote: spoweck wrote on Sat, 17 March 2007 18:31
—————————————————-
> Hi all!
>
> I need to process the audio from a qt player i did, but i don’t know how to route the audio signal…
>
> Please, help me!!!!
>
>
> Thx!
>
>
—————————————————-


March 18, 2007 | 11:49 am

The problem with this is that it takes time to load to a buffer. If you wanted to switch between tracks quickly then it’s not possible.

Quote: Mattijs wrote on Sat, 17 March 2007 17:31
—————————————————-
> Import the movie in a buffer~ and in a qt.movie simultaeously, set the rate of the qt.movie to 0 and use time messages to sync the movie to the playhead you use to play the buffer~
>
> I remember posting examples of that approach on this forum before..
>
> Mattijs
>
> Quote: spoweck wrote on Sat, 17 March 2007 18:31
> —————————————————-
> > Hi all!
> >
> > I need to process the audio from a qt player i did, but i don’t know how to route the audio signal…
> >
> > Please, help me!!!!
> >
> >
> > Thx!
> >
> >
> —————————————————-
>
>
—————————————————-


March 18, 2007 | 12:03 pm

Quote: Chris Hipgrave wrote on Sun, 18 March 2007 12:49
—————————————————-
> The problem with this is that it takes time to load to a buffer. If you wanted to switch between tracks quickly then it’s not possible.

True.

I didn’t try spigot~ but I can imagine it takes more resources to stream from hd than read from memory (as buffer~ does). Now that I think of it.. would I benefit cpu-wise from only importing the video track into qt.movie? Hmm.. time to do some research.

Mattijs

>
> Quote: Mattijs wrote on Sat, 17 March 2007 17:31
> —————————————————-
> > Import the movie in a buffer~ and in a qt.movie simultaeously, set the rate of the qt.movie to 0 and use time messages to sync the movie to the playhead you use to play the buffer~
> >
> > I remember posting examples of that approach on this forum before..
> >
> > Mattijs
> >
> > Quote: spoweck wrote on Sat, 17 March 2007 18:31
> > —————————————————-
> > > Hi all!
> > >
> > > I need to process the audio from a qt player i did, but i don’t know how to route the audio signal…
> > >
> > > Please, help me!!!!
> > >
> > >
> > > Thx!
> > >
> > >
> > —————————————————-
> >
> >
> —————————————————-
>
>
—————————————————-


March 22, 2007 | 5:59 pm

So using the time messages will sync the playback of the video and the audio if they are separated—one in a jit.qt.movie, one in an audio buffer~ ? That is very helpful to know for adding audio effects etc., so that the audio track playback is separate from the movie, and not dealing with spigot~ (which is OK but dealing directly with a pre-made audio track is preferable).

From what you said is sounds like you can import a qt movie into an audio buffer, and it’ll just grab the audio track. Also helpful and not immediately obvious that it would do this. Guess I should do some more experimentation.

I would imagine importing only the video track (not the audio) in the qt.movie would help CPU-wise. Also, changing the playback rate of the video past 1.0 or past -1.0 seems to make the playback stutter badly when there’s an audio track (qt is trying to stretch the audio and can’t do it very well). However, of course, once it’s into MSP, all this is easy and very smooth audio-wise. So, I think keep them separate, and use your trick with the time commands to sync them up.

Thanks for the input, it’s just what I needed at just the right time.

–CJ


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