30 May
2010
30 May
'10
1:37 a.m.
On 05/30/2010 12:39 AM, Jeremy Henty wrote:
I want to create an animation for a track my band recorded and I'm
wondering how to get it in sync. It's a straight 4/4 piece but we
weren't playing to a click track so the tempo varies slightly. Most
of the advice I get is "Open it in Audacity (or similar) and eyeball
the beats from the waveform" but it would be very cool if there was an
app that could read the audio and spit out the beat times. Is there?
likely even more than one :)
Ardour has the "Rhythm Ferret" (Menu -> Window -> Rhythm Ferret) which
can split a track into pieces on Note or Percussive onset.
There's also an option to set the tempo-map (instead of splitting the
track) but I never go this to work.. AFAIK the RF is still work in progress.
To 'spit out' the times: I dunno if ardour can do that these days. But
you can always save the ardour session and extract the start-time of
each region with something alike this:
cat /path/to/session.ardour \
| grep "<Region " \
| grep "Audio 1" \
| sed 's/^.* start="\([0-9]*\)".*$/\1/' \
| awk '//{print $0/44100.0;}' \
| awk '//{printf "%02i:%02i:%02i:%02i\n", \
$0/3600, ($0/60)%60, $0%60, ($0*25)%25;}'
/tmp/beattimes.txt
Replace the 44100.0 with your sample-rate (48000?), 25 with your
video-fps. and "Audio 1" with the track-name.. In principle this could
be an awk one-liner; but the above is a bit more readable.. (-;
robin
Regards,
Jeremy Henty
--
The music business is a cruel and shallow money trench, a long plastic
hallway where thieves and pimps run free, and good men die like dogs.
There's also a negative side.
-- Hunter S. Thompson
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