12 Nov
2003
12 Nov
'03
1:05 a.m.
Hi,
I apologize if this question is off-topic for the list, although I
believe this is an appropriate forum.
I'm looking for a command-line or script-oriented audio compositor.
Specifically, I'd like to be able to do something like:
audio-composite track1.wav 100 track2.wav 200 > composited.wav
and audio-composite would generate a new wav file which would consist
of the sounds in track1.wav playing from the 100 second mark, and the
sounds in track2.wav playing from the 200 second mark. I'm looking for
something driven via the command-line or in a script because I want to
composite close to a hundred different clips with second-accurate
insertion points, so I don't much fancy doing this with the plethora of
gui sound editors that exist.
I've gone through Freshmeat and the best I've found so far is soxmix's
ability to mix multiple wav files into one: with some appropriate
munging, I could make that do what I want, but I'm hoping to find a tool
built for the job.
Any help greatly appreciated!
Denis
denism(a)cyberus.ca
12 Nov
12 Nov
1:53 a.m.
On Wed, 12 Nov 2003 00:05:02 -0500
Denis McLaughlin <denism(a)cyberus.ca> wrote:
I'm looking for a command-line or
script-oriented audio compositor.
Specifically, I'd like to be able to do something like:
I think you want ecasound.
http://eca.cx/
Cheers,
- Graham
2:03 a.m.
Hi
Denis McLaughlin wrote / a écrit:
I'm looking for
something driven via the
command-line or in a script because I want to
composite close to a hundred different clips with second-accurate
insertion points, so I don't much fancy doing this with the plethora of
gui sound editors that exist.
I strongly believe ecasound can do the job, with the appropriate parameters:
http://www.wakkanet.fi/~kaiv/ecasound/welcome.html
GuyCLO~
12:49 p.m.
To be more specific and add another vote for ecasound, here is an
example from the ecasound docs at
http://www.wakkanet.fi/~kaiv/ecasound/Documentation/examples.html:
" Cut, copy and paste
1. ecasound -i bigfile.wav -o part1.wav -t:60.0
2. ecasound -i bigfile.wav -y:60.0 -o part2.wav
Here's a simple example where first 60 seconds of bigfile.wav is
written to part1.wav and the rest to part2.wav. If you want to combine
these files back to one big file:
3. ecasound -i part2.wav -o part1.wav -y:500
part2.wav is appended to part1.wav "
I'm using this functionality in a shell script that takes 12 ~5 minute
wav files and concatenates them into 4 ~15 minutes wav files. I'll post
it tonight when I get home from work.
ecasound can also give you the length in seconds (and milliseconds) of a
file so that you can possible script your insertion points ... I haven't
figured that out exactly, yet, but believe it can be done by parsing the
output of ecalength (an ecasound tool included with ecasound). There may
be a cleaner, easier way as well.
-Eric Rz.
On Wed, Nov 12, 2003 at 10:01:00AM +0400, Guy Daniel CLOTILDE wrote:
Hi
Denis McLaughlin wrote / a ?crit:
I'm looking for
something driven via
the command-line or in a script because I want to
composite close to a hundred different clips with second-accurate
insertion points, so I don't much fancy doing this with the plethora of
gui sound editors that exist.
I strongly believe ecasound can do the job, with the appropriate parameters:
http://www.wakkanet.fi/~kaiv/ecasound/welcome.html
GuyCLO~ 
10:41 p.m.
as promised .... (and for what it's worth)
box1:~/bin$ cat guitar_mix_pre.sh
#!/bin/sh
#
# guitar_mix_pre.sh
#
# follow up script to guitar_mix_pre.py
#
# concatenates files [0-11].wav to track[1-4].wav
# using ecasound cut and paste operations.
# all of the files from the pool are between 300.0 and 301.44
# seconds long ... there might be some way to get the length
# from ecalength and use that when concatenating ...
# for now assume all files are 302s long
# eventually do this from python with ECI or python EIM
# and get the real length of each file before appending
# (or maybe just never worry about that and leave the gaps)
#
tmp_dir=/mnt/ramfs/guitar_mix/
eca="ecasound -q"
cd $tmp_dir
c=0
for i in `seq 1 4`; do
#first 1/3
mv -f $c.wav track$i.wav
#second 1/3
c=$(($c+1))
$eca -i $c.wav -o track$i.wav -y:302
rm -f $c.wav
#third 1/3
c=$(($c+1))
$eca -i $c.wav -o track$i.wav -y:604
rm -f $c.wav
c=$(($c+1))
done
Eric Dantan Rzewnicki wrote:
To be more specific and add another vote for ecasound, here is an
example from the ecasound docs at
http://www.wakkanet.fi/~kaiv/ecasound/Documentation/examples.html:
" Cut, copy and paste
1. ecasound -i bigfile.wav -o part1.wav -t:60.0
2. ecasound -i bigfile.wav -y:60.0 -o part2.wav
Here's a simple example where first 60 seconds of bigfile.wav is
written to part1.wav and the rest to part2.wav. If you want to combine
these files back to one big file:
3. ecasound -i part2.wav -o part1.wav -y:500
part2.wav is appended to part1.wav "
I'm using this functionality in a shell script that takes 12 ~5 minute
wav files and concatenates them into 4 ~15 minutes wav files. I'll post
it tonight when I get home from work.
ecasound can also give you the length in seconds (and milliseconds) of a
file so that you can possible script your insertion points ... I haven't
figured that out exactly, yet, but believe it can be done by parsing the
output of ecalength (an ecasound tool included with ecasound). There may
be a cleaner, easier way as well.
-Eric Rz.
13 Nov
13 Nov
9:10 p.m.
Sah-weet! I had looked at ecasound before but I though that it didn't
do what I wanted, since it only offers a way of controlling the mark-in
and mark-out point on the source file (to borrow video-editing
parlance), not the mark-in on the target. However, when I grovelled
about a bit more, I found that the .ewf file format is exactly what I
wanted.
Many thanks to you, Graham, and Eric for your help!
Denis
On Wed, 2003-11-12 at 01:01, Guy Daniel CLOTILDE wrote:
Hi
Denis McLaughlin wrote / a écrit:
I'm looking for
something driven via
the command-line or in a script because I want to
composite close to a hundred different clips with second-accurate
insertion points, so I don't much fancy doing this with the plethora of
gui sound editors that exist.
I strongly believe ecasound can do the job, with the appropriate parameters:
http://www.wakkanet.fi/~kaiv/ecasound/welcome.html
GuyCLO~
7683
days inactive
7684
days old
linux-audio-user@lists.linuxaudio.org
5 comments
5 participants
participants (5)
-
Denis McLaughlin -
Eric Dantan Rzewnicki -
Eric Dantan Rzewnicki -
Graham Percival -
Guy Daniel CLOTILDE