[Ramamohan Yeggoni <Ramamohan.Yeggoni@xxxxxxxxxxx>]

Hi Miha,

Thank you for your response.
But the problem is that the resulting .au file has the conversation which
does not start the reverse voice sample in correct timing. It has played
back as if both parties are keep on talking without listening to each other.
But there is a
Clear time difference between forward and reverse voice.

In static gboolean copy_file(gchar *dest, ...) the following is used to
write the silence information to one channel.


			if (user_data->forward.statinfo.start_time >
user_data->reversed.statinfo.start_time) {
				f_write_silence = (guint32)
	
((user_data->forward.statinfo.start_time-user_data->reversed.statinfo.start_
time)*8000);
			}
			else if (user_data->forward.statinfo.start_time <
user_data->reversed.statinfo.start_time) {
				r_write_silence = (guint32)
	
((user_data->reversed.statinfo.start_time-user_data->forward.statinfo.start_
time)*8000);
			}

It seems the r_write_silence value is less than the required. Any thoughts??


Thanks in advance,

Regards,
Ram






-----Original Message-----
From: ethereal-dev-bounces@xxxxxxxxxxxx
[mailto:ethereal-dev-bounces@xxxxxxxxxxxx] 
Sent: 24 May 2005 10:48
To: Ethereal development
Subject: Re: [Ethereal-dev] Saving RTP payload!


Hi,

this was the initial idea how to save the rtp payload. In case of "both
direction" the amplitude of forward and reversed voice samples is simply
added together and divided by 2. Although the setting inside the .au file
header is to use stereo mode (channels==1) the actual information is not
saved seperately. Why? I think there was no need for this that time, since
this is quite seldom used options. But it can be changed. Look inside
rtp_analysis.c:

static gboolean copy_file(gchar *dest, ...)
	...	
	...
	/* both directions */
	...
	*pd = (unsigned char)linear2ulaw( (f_pd + r_pd)/2 );


Regards, Miha



On Tue, 2005-05-24 at 10:54, Ramamohan Yeggoni wrote:
> Hi All,
> 
> Using ethereal, I am trying to save the conversation into single .au 
> file. We are using g711 a law (8KHz) codec and captured packets using
> ethereal Version 0.10.10.
> Saving the rtp payload in forward/reverse directions separately to .au
> files is fine.
> When I opt for both directions, the conversation on both channels got
> overlapped. 
> While playing back I can hear both channels simultaneously. 
> Could you please let me know the reason for the same and how to
> correct this issue.
> 
> Any help in this regard is highly appreciated.
> 
> Thanks and Regards,
> Ram
> 
> 
> 
> 
> 
> 
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-- 
Miha Jemec <m.jemec@xxxxxxxxxxx>

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This e-mail message (including any attachment) is intended only for the personal 
use of the recipient(s) named above. This message is confidential and may be 
legally privileged.  If you are not an intended recipient, you may not review, copy or 
distribute this message. If you have received this communication in error, please notify 
us immediately by e-mail and delete the original message.

Any views or opinions expressed in this message are those of the author only. 
Furthermore, this message (including any attachment) does not create any legally 
binding rights or obligations whatsoever, which may only be created by the exchange 
of hard copy documents signed by a duly authorised representative of Hutchison 
3G UK Limited.
________________________________________________________________________