OK, after some more trial and error I have the correct data, however, it is not
writing the wav header correctly. Now I don't really care about that as when I
play it back I can specify the format in which it will be played and everything
sounds fine.
So I'm not really concerned but I would still be interested to know how to do
it all properly. At the moment I can either get the correct header info or the
correct data but not both.
Cheers
Stephen Paterson
Developer | SYNETY
www.synety.com<http://www.synety.com/>
ddi: 01134 166029
main: 0330 335 0000
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From: Stephen.Paterson [mailto:stephen.pater...@synety.com]
Sent: 10 April 2013 13:04
To: sox-devel@lists.sourceforge.net
Subject: [SoX-devel] Half length output with libsox for stereo -> mono
Hi all,
I've found a couple of threads relating to this problem but I can't for the
life of me get it to work.
The following command line works fine:
sox original.wav -c 1 -r 8000 converted.wav
I can't get it to work with libsox. I've made a tiny modification to example3.c
that should do the same but no matter what I try I always end up with a file
that is exactly half the length of the one I get from sox (or some crazy audio).
If I leave the output as stereo I get the full length audio but sadly stereo is
no use to me.
The 2 threads I've found are [Sox-devel] 'Effects going crazy' - 2012-05-07 and
[SoX] 'Channels/remix does not function as documented' - 2011-11-12
Nothing suggested in either seems to work for me. Could someone take a look at
the attached code (it's very simple) to see if they can see what I'm doing
wrong please? It's driving me crazy! I'm at the point of giving up and just
spawning the sox executable from my code but that would make me cry.
The following is the format of my test input file but it needs to work for any
wav file:
RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, stereo 24000 Hz
Desired output will always be in the following format regardless of the input
format:
RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000 Hz
Apologies if this is more appropriate for sox-users. If so, just let me know
and I'll post there.
Cheers
Stephen Paterson
Developer | SYNETY
www.synety.com<http://www.synety.com/>
ddi: 01134 166029
main: 0330 335 0000
SMARTER COMMUNICATIONS
Confidentiality: This e-mail transmission, including any attachments, is
intended only for the named recipient(s) and may contain information that is
privileged, confidential and/or exempt from disclosure under applicable law. If
you have received this transmission in error, or are not the named
recipient(s), please notify the sender immediately by return e-mail and
permanently delete this transmission, including any attachments.
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virus but it is the responsibility of the recipient to ensure this is so.
E-mail is not a 100% secure communications medium. We recommend you observe
this when e-mailing us.
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