[Freeswitch-users] Recording ULAW files
anthony.minessale at gmail.com
Wed Jan 21 11:28:19 PST 2009
The default audio framework operates on raw audio.
The mod_native_file triggers a special flag that tells the higher level
api's for recording not
to transcode the audio first.
It would probably be easier for you to use the api_hangup_hook variable to
trigger a sox command
to wrap the files in a wav or use a batch process in cron to do so than to
try to figure it out in the code.
On Wed, Jan 21, 2009 at 1:05 PM, <freeswitch-users at digitaldan.com> wrote:
> Thanks for the quick reply.
> I'm new to this project so I'm not familiar with the inner workings just
> yet but at looking at mod_native_file.c it seems this is a thin wrapper
> around the switch's own file input and output routines? Would it be best to
> change this class or register a new file type, like .ul? If so, where would
> be a good starting point.
> ----- Original Message -----
> From: "Anthony Minessale" <anthony.minessale at gmail.com>
> To: freeswitch-users at lists.freeswitch.org
> Sent: Wednesday, January 21, 2009 10:56:45 AM GMT -07:00 US/Canada Mountain
> Subject: Re: [Freeswitch-users] Recording ULAW files
> no, there is currently no way to do that.
> It would be feasible to add an option to mod_native_file to write wav
> headers around the raw data but it has not been attempted.
> On Wed, Jan 21, 2009 at 10:48 AM, <freeswitch-users at digitaldan.com> wrote:
>> Hi, I'm recording files using the pcmu extension in order to save them in
>> the g.711 ulaw format, which is what everything in my network uses. It
>> appears that the recorded file is just raw data without a header. Is there
>> any way to save this as a wav type with a header (keeping the ulaw format)?
>> for example, running the unix command 'file' on the recording prints:
>> /tmp/185065_f7bb8e0c-e641-11dd-800d-5ffe41c540dd.PCMU: data
>> if I run it through sox which just outputs the same data (ulaw,8000,mono)
>> but specifying the type as wav
>> /usr/bin/sox -t .ul -r 8000 -c 1 -b -U file.pcmu -t wav -r 8000 -c 1 -b -U
>> it produces a file that shows:
>> /tmp/185065_f7bb8e0c-e641-11dd-800d-5ffe41c540dd.wav: RIFF (little-endian)
>> data, WAVE audio, ITU G.711 mu-law, mono 8000 Hz
>> if I try and save it within freeswitch using the wav extension, it
>> trans-codes it to a pcm format
>> RIFF (little-endian) data, WAVE audio, Microsoft PCM, 16 bit, mono 8000
>> Is there any way to have freeswitch record the file as ulaw with the RIFF
>> wav header?
>> Freeswitch-users mailing list
>> Freeswitch-users at lists.freeswitch.org
> Anthony Minessale II
> FreeSWITCH http://www.freeswitch.org/
> ClueCon http://www.cluecon.com/
> AIM: anthm
> MSN:anthony_minessale at hotmail.com <MSN%3Aanthony_minessale at hotmail.com>
> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com<PAYPAL%3Aanthony.minessale at gmail.com>
> IRC: irc.freenode.net #freeswitch
> FreeSWITCH Developer Conference
> sip:888 at conference.freeswitch.org <sip%3A888 at conference.freeswitch.org>
> iax:guest at conference.freeswitch.org/888
> googletalk:conf+888 at conference.freeswitch.org<googletalk%3Aconf%2B888 at conference.freeswitch.org>
> _______________________________________________ Freeswitch-users mailing
> list Freeswitch-users at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:
> Freeswitch-users mailing list
> Freeswitch-users at lists.freeswitch.org
Anthony Minessale II
MSN:anthony_minessale at hotmail.com <MSN%3Aanthony_minessale at hotmail.com>
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com<PAYPAL%3Aanthony.minessale at gmail.com>
IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org <sip%3A888 at conference.freeswitch.org>
iax:guest at conference.freeswitch.org/888
googletalk:conf+888 at conference.freeswitch.org<googletalk%3Aconf%2B888 at conference.freeswitch.org>
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the FreeSWITCH-users