20 Sep
2011
20 Sep
'11
4:17 p.m.
Well... Sorry to answer my self. I was in such a hurry I wasn't paying
enough attention to the various switches:
On 20/09/2011 15:29, Lorenzo Sutton wrote:
I have a sox + lame pipe of this kind:[1][2]
sox sin.mp3 -t wav - trim 10 20 fade t 2 10 2 | lame - -r out.mp3
Indeed the -t wav in sox will produce a wave file, and thus with a
header, while -r in lame expects raw. So change -t wav to -t raw or
remove the -r in lame solves the problem:
sox sin.mp3 -t wav - trim 10 20 fade t 2 10 2 | lame - out.mp3
or
sox sin.mp3 -t raw - trim 10 20 fade t 2 10 2 | lame - -r out.mp3
So "the click is the header"...
Sorry again for posting in a rush :)
Lorenzo.
Everything is fine but the final mp3 file[3] always has an annoying
click at the beginning. This has somewhat to do with the pipe as it
doesn't happen if I create a wave file from sox. Nor does it happen if I
use sox only:
sox sin.mp3 out2.mp3 trim 10 15 fade t 2 10 2
Yet the latter needs sox compiled with mp3 support, which is less
portable than the above.
I'm not sure how to look into this so any suggestion is welcome.
Lorenzo
[1] No I can't use better, non-evil formats this time
[2] No, I haven't the uncompressed source, so I can only use the mp3 as
input: life sucks.
[3] Here: BUT ATTENTION!! There is a click at the beginning so turn
volume right down: http://lorenzosu.altervista.org/temp/dump/out.mp3 The
source file here:
http://lorenzosu.altervista.org/temp/dump/sin.mp3
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