That's an interesting idea, please file feature request on
bugreports.apple.com
Right now the audio spectrum is only fed in from iTunes when playing
the composition in the QC Editor or in iTunes.
You can record your visualizer with music using the MovieExporter
plugin in /Developer/Examples/Quartz Composer/Plugins, but quality/fps
won't be optimal.
For better quality/fps, you can record the spectrum via some code that
you would write and play at lower speed into MovieExporter plug-in.
Kevin
On Jan 23, 2008, at 4:04 PM, Joel Ibbetson wrote:
Good day all,
More on the Audio based graphics... I am currently trying to make
some loops that react to a certain audio track for After Effecting
and post-production.
I first made a QC loop with Audio Input working in QC and then
dropped the .qtz file into iMovie and added the audio track
underneath. Unfortunately there is no audio reaction in iMovie from
the combined result.
My next attempts were to:
1; File > Export > Quicktime Movie from Quartz
2; Then added Music to the selection in Quicktime Pro and saved as a
self-contained Movie to unite the sound and vision. Works great when
opening back up in Quicktime.
3; I then try to import this file into After Effects but it has an
Error message ("File has no Duration" But File > Info in Quicktime
says there is actually 3mins.55secs).
– Alternately, dropping this .mov into iMovie produces the Audio only.
I have also tried Exporting the united file (from Quicktime) to
various Codecs (jpeg, mp4, animation, Sorenson) but this loses the
audio reactiveness of the clips.
My next trial would be to record the combined result out to a DV
tape but would then have to re-import this (iMovie) in to make it a
digital file animation for use in After-Effects. Though it will
work, this strikes me as a bit of a long way round having to go out
of the computer and then back in.
Is it possible to get a Quartz Quicktime file with the Audio Input
already applied and locked in into After Effects or other editing
software?
Thanks in advance for any advice.
Best regards,
Joel
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Kevin Quennesson
Quartz Composer Team
Apple Inc.
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