Re: [SoX-users] Keep multiple files AND merge into one file

[Ryan D. <ry...@ju...>]

Erich,
Thanks for your suggestion, and I understand I don't want to encode the
same piece over and over again.

My problem with running `sox 1.mp3 2.mp3 master.mp3` is that the separate
smaller files are not all available at the same time.

I have the following sox command to record transmissions from an online
fire/ambulance stream:

sox http://audio2.radioreference.com/303085458.mp3 ~/transmissions/tx.mp3
silence 1 1.2 0.5% 1 0.05 0.5% : newfile : restart

This creates a new tx001.mp3, tx002.mp3 tx.003.mp3, etc. every time there
is a transmission on the stream.

What I want to be able to do is keep these separate transmissions files,
but every time a new one is created, add its audio to the end of a
master.mp3 file which contains all of the transmissions in one larger file.

My purpose for this is to use something like wavesurfer.js (
http://www.wavesurfer.fm/) in order to visualize and navigate through a
day's worth of transmissions. The problem with wavesurfer is that it
appears to only take 1 audio file. I cannot use an array of files for one
visualization.

So my hope was to keep the individual files for other purposes, but
simultaneously add each new transmission to a separate master.mp3 file
which could then be loaded into wavesurfer.

Ryan

On Tue, Jun 9, 2015 at 1:46 AM Erich Eckner <er...@ec...> wrote:

> Hi,
>
> since mp3 is a lossy format, I do not recommend encoding the same piece
> of audio over and over again.
> Rather just do
> sox 1.mp3 2.mp3 ... n.mp3 master.mp3
> or within linux' bash
> sox {1..n}.mp3 master.mp3
>
> This will create master.mp3 "from scratch", which will not add more and
> more codec-based glitches.
>
> greetings,
> Erich
>
> Am 09.06.2015 um 07:03 schrieb Peter Shute:
> > This sounds more like a problem of how to identify new files, rather
> than a sox problem.
> >
> > If you were to move or rename each new file after adding it to
> master.mp3 then it would simplify that task because only the next new file
> would match the n.mp3 naming pattern.
> >
> > Peter Shute
> >
> > Sent from my iPad
> >
> >> On 9 Jun 2015, at 1:54 pm, Ryan Dougher <ry...@ju...> wrote:
> >>
> >> Hi folks,
> >> I have a dir which mp3s are regularly added to one at a time. Each time
> an mp3 is added, I would like to copy it onto the end of another file while
> keeping the separate files.
> >>
> >> Ex:
> >> 1.mp3 shows up
> >>   - add to end of master.mp3
> >> 2.mp3 shows up
> >>   - add to end of master.mp3
> >> 3.mp3 shows up
> >>   - add to end of master.mp3
> >>
> >> Note that the files are added to the dir *one at a time*. So the first
> to show up is 1.mp3, which I would then run `sox 1.mp3 master.mp3` and the
> content of 1.mp3 would be copied to master.mp3. But then 2.mp3 shows up and
> I run `sox 2.mp3 master.mp3` and it overwrites master.mp3 with only the
> content of 2.mp3.
> >>
> >> Is there any way to simply add each new file (one at a time, as they
> show up) to the end of master.mp3 *without* overwriting the previous
> content of the other mp3 files?
> >>
> >> Thanks,
> >> Ryan
> >>
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