[Speex-dev] file couldn't play after Speex encode and decode

[John Edwards]

The encoded speex file should, by convention, be given the '.spx'
extension rather than '.wav', but that is not the issue. What appears to
be happening is that the '.wav' extension on your named output file from
speexdec is not being recognised as '.wav' and, consequently, the file
is being written as 'raw' data without the wave file header. I am not
sure why that should be other than to suggest that maybe your system
generates unicode/wide chars that speexdec is failing to recognise?

Best I can do, I'm afraid.

John

鲍 wrote:
> I did as follows:in speexenc.c, I created a outfile;in speexdec.c,I set 
> the outfile as infile.So,i implemented like this:
> speexenc sample.wav tmp.wav
> then,
> speexdec tmp.wav sampleout.wav
> But,the sampleout.wav still lacked  the file  header.I think  I didn't 
> got your words right.Could you explain more detailed how i should 
> do?Thanks a lot!
> sorry to bother you so much.
> 
> 2007/7/13, John Edwards <john.edwards33 at ntlworld.com 
> <mailto:john.edwards33 at ntlworld.com>>:
> 
>     I suggest that you write the command line as Jean-Marc suggested:
> 
>     speexenc sample.wav - | speexdec - sample_out.wav
> 
>     I have tested this and it works as expected. You need to specify the '-'
>     for stdin and also for stdout.
> 
>     John
> 
>     As an aside, I notice that the wave output from speexdec does not write
>     the wave file header when the output is destined for stdout. I believe
>     this is incorrect and that the first write of the header should be
>     performed so that the output can be identified. Clearly the subsequent
>     seeks to rewrite the header information should only be performed on a
>     'real' output file.
> 
>     鲍 wrote:
>      >
>      > thank you,sir!But I don't konw how to add the file header.Could
>     you help me?
>      > 2007/7/12, John Edwards <john.edwards33 at ntlworld.com
>     <mailto:john.edwards33 at ntlworld.com>
>      > <mailto:john.edwards33 at ntlworld.com
>     <mailto:john.edwards33 at ntlworld.com>> >:
>      >
>      >     This is because the output file has been written without the
>     44 byte
>      >     wave file header.
>      >
>      >     John
>      >
>      >     鲍 wrote:
>      >      > Dear sir,
>      >      > I've a problem that the .wav file couldn't play after calling
>      >     "sampleenc
>      >      > male.wav|sampledec male_speex_15.wav".I found that the new
>     file
>      >      > male_speex_15.wav is smaller than the original file in size.I
>      >      > implemented the test on Linux system.The original file
>     male.wav
>      >     is 96044
>      >      > bytes,while the new file male_speex_15.wav is 96000 bytes.I'm
>      >     eager to
>      >      > know the reason.Thank you!
>      >      >
>      >      > sincerely,
>      >      > Weiqin Bao
>      >      >
>      >      >
>      >      >
>      >      >
>      >    
>     ------------------------------------------------------------------------
>      >      >
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>     Speex-dev at xiph.org <mailto:Speex-dev at xiph.org>>
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>      >      >
>      >      >
>      >      >
>      >    
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