On 2019-12-11 14:26, Martin Ratinaud wrote:
Hi all,
I'm converting a file called vocals.wav to vocals.mp3
vocals.wav
<https://drive.google.com/file/d/1he1eCJag1G8iGkgL932jy_mXuLT_khGM/view?usp=drive_web>
For this I'm using this command
```
sox vocals.wav vocals.mp3
```
and here is the result of the corresponding files
- original file
```
soxi /Users/martin/Downloads/split-test/vocals.wav
Input File : '/Users/martin/Downloads/split-test/vocals.wav'
Channels : 2
Sample Rate : 44100
Precision : 16-bit
Duration : 00:03:00.00 = 7938000 samples = 13500 CDDA sectors
File Size : 31.8M
Bit Rate : 1.41M
Sample Encoding: 16-bit Signed Integer PCM
```
- converted file
```
soxi /Users/martin/Downloads/split-test/vocals.mp3
Input File : '/Users/martin/Downloads/split-test/vocals.mp3'
Channels : 2
Sample Rate : 44100
Precision : 16-bit
Duration : 00:03:00.04 = 7939544 samples = 13502.6 CDDA sectors
File Size : 2.88M
Bit Rate : 128k
Sample Encoding: MPEG audio (layer I, II or III)
```
You can see that the duration is not the same which is weird and the
number
of samples also changed.
In fact, 1544 samples have been added to the beginning of the file
Which version of sox, on what OS?
Did you build the sox binary yourself or download it from somewhere?
Although you say the command was just
sox vocals.wav vocals.mp3
sox can also incorporate values of environment variables. Is there any
chance that on your OS the command has included any other parameters?
See the 'SOX_OPTS' section of the manual.
If you reissue the command, as eg
sox -V3 vocals.wav vocals002.mp3
(or even -V4 or more) do any of the info messsages give any clues? Is
the
result file the same size as your one?
If I try to launch `sox -V vocals.mp3 vocals-trimmed.mp3 trim 1544s` it
does not work
You'll need to be more precise. What sort of "not work"? Does sox
run?
Does it produce any messages? Is there a result file? How long was it?
--
Jeremy Nicoll - my opinions are my own
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