Re: [ecasound] Ecalength and m4a files

From: S. Massy <lists@email-addr-hidden>
Date: Thu Jul 21 2011 - 21:11:20 EEST

On Sun, Jul 17, 2011 at 10:03:32PM +0200, Julien Claassen wrote:
> Hi Navneeth!
> I rarely have use for m4a files. But I've seen something similar with OGG
> files. If it's the same problem, then you won't have luck with ecalength, as
> far as I understand.
> to read m4a files, Ecasound uses extnerla programs. Ecasound can open and
> play them, by something like:
> oggdec -o - FILE.ogg
> and Ecasound then reads the STDOUT "-" and puts that decoded audio to the
> Soundcard or wherever you please. But this way you can't tell the length of a
> file. You might try the sndfile-programs. There's sndfile-info. Maybe they
> have built-in support for that. Though I'd doubt it. Still, that doesn't say
> much.
> Otherwise just try looking for alac, m4a tools. I'm sure there must be
> something. There is faac and faad and maybe something else. If not, maybe even
> they can be used to find the length of a file, with some clever scripting.
> Sorry, for not being more specific. Still ecalength isn't your way, unless
> you convert to wav along the way.
Not much to add, except to say that this problem also occurs with some
mp3's (usually VBR) and there isn't much ecalength/ecasound can do about
it, since it relies on external programmes to handle anything but the
PCM formats.


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Received on Fri Jul 22 00:15:02 2011

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