[asterisk-dev] ODBC stored voicemail blob object format

[Tilghman Lesher]

On Thursday 26 November 2009 05:58:35 Nir Simionovich wrote:
>   In general, I gathered the the BLOB object stored in the database
> isn't a full WAV file format, and actually is
> a RAW ADPCM file, which is playable from a standard media player.
> However, the file in non-playable from
> an ADOBE based flash player - which requires a fully standard WAV file.
>
>   Questions that arise in this case are:
> 1. Is there a method to convert the stored BLOB to a valid WAV format?
> 2. Adding proper WAV support to Asterisk, is it feasible?
> 3. Is there an external method of converting from the RAW format to
> proper WAV? (tried SOX with no success).
>
>   I'm not an audiophile, so I'm kind'a of at a loss here.

From my past experience with Flash development, I've ascertained that it
CANNOT handle the wav49 format (aka "WAV"), which is a compressed format, but
only the uncompressed "wav" format.  MPEG Layer 3 was another option, though
of course we don't have a licensed encoder for that in Asterisk.

-- 
Tilghman Lesher
Digium, Inc. | Senior Software Developer
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