On Wed, 2006-12-06 at 10:12 +0100, [EMAIL PROTECTED] wrote:

> with tcpdump you have a pcap-format that you can compare bit for bit with
> the origingal audio, but that is hardly productive.
> rtptools also seems to keep this on a packet level, so we need to find
> a tool to transform pcap to audio or a tool to store audio directly,

ethereal can save the payload but I don't believe it can be done from
the command line.

> and then to find a nice simple scriptable tool to compare the audio quality.

I'm pretty sure this tool does not exist, at least not in the open
source world. I looked for something like this a few years back and the
only things available were commercial packages for very high prices.

Let me know if you find anything.

>   <!-- Play a pre-recorded PCAP file (RTP stream)                       -->
>   <nop>
>     <action>
>       <exec play_pcap_audio="pcap/g711a.pcap"/>
>       <exec command="tcpdump-vent 9 -s 0 -w uac_echo_[remote_ip]_6000_`date 
> +%F_%T`.pcap src host [remote_ip] and dst port 6000"/>
>     </action>
>    </nop>


I'm confused; why are you playing back and capturing the file in the
same script? I assume this is just proof of concept?

In any case I do see the application of your idea and it looks very
promising.

I only used SIPp for the first time yesterday and already it has helped
me track down a very elusive problem (can you believe we had a client
with one PRI channel that was bad!? I didn't even think that was
possible. I never would have found that without an automated testing
tool like SIPp).

John



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