specifying format of RAW files

specifying format of RAW files

[Jan Stary]

When playing RAW audio files, the specified format seems to
only take effect for the first file. Subsequent files fail
to play because of unspecified rate etc.

$ play -c 1 -r 48000 -e float -b 32 pcm1.raw	# OK
$ play -c 1 -r 48000 -e float -b 32 pcm2.raw	# OK
$ play -c 1 -r 48000 -e float -b 32 pcm*.raw
  play FAIL formats: bad input format for file `pcm2.raw':
  sampling rate was not specified

Is this intended, or should the specified format be used
for the subsequent files as well?

(That would probably not make sense for self-describing formats:
$ play -c 1 -r 48000 -e float -b 32 pcm1.raw file.wav file.mp3 )

	Jan


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Re: specifying format of RAW files

[Måns Rullgård]

Jan Stary <hans@stare.cz> writes:

> When playing RAW audio files, the specified format seems to
> only take effect for the first file. Subsequent files fail
> to play because of unspecified rate etc.
>
> $ play -c 1 -r 48000 -e float -b 32 pcm1.raw	# OK
> $ play -c 1 -r 48000 -e float -b 32 pcm2.raw	# OK
> $ play -c 1 -r 48000 -e float -b 32 pcm*.raw
>   play FAIL formats: bad input format for file `pcm2.raw':
>   sampling rate was not specified
>
> Is this intended, or should the specified format be used
> for the subsequent files as well?

This is intentional.  Format options apply to the following file only.
Having them apply to a sequence of raw files could of course be useful,
but I'm afraid this would require quite some work.  Remember that these
same options will also override parameters in the file headers.

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Måns Rullgård

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Re: specifying format of RAW files

[Måns Rullgård]

Måns Rullgård <mans@mansr.com> writes:

> Jan Stary <hans@stare.cz> writes:
>
>> When playing RAW audio files, the specified format seems to
>> only take effect for the first file. Subsequent files fail
>> to play because of unspecified rate etc.
>>
>> $ play -c 1 -r 48000 -e float -b 32 pcm1.raw	# OK
>> $ play -c 1 -r 48000 -e float -b 32 pcm2.raw	# OK
>> $ play -c 1 -r 48000 -e float -b 32 pcm*.raw
>>   play FAIL formats: bad input format for file `pcm2.raw':
>>   sampling rate was not specified
>>
>> Is this intended, or should the specified format be used
>> for the subsequent files as well?
>
> This is intentional.  Format options apply to the following file only.
> Having them apply to a sequence of raw files could of course be useful,
> but I'm afraid this would require quite some work.  Remember that these
> same options will also override parameters in the file headers.

Oh, and something like this should work in your case:

$ play $(printf '-c 1 -r 48000 -e float -b 32 %s ' pcm*.raw)

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