[Asterisk-video] if2 bit stuffing in app_h324m

[Klaus Darilion]

great, thanks

Francesco Emmi schrieb:
> Hi Klaus
> 
> 
> Klaus Darilion wrote:
>>>> btw: Why is the mode not bit-reversed? If it is about bit order in 
>>>> general I would think that "mode" must be reversed too?
>>> No. Mode must not bit reversed. About standards and reason of bit order 
>>> I can't answer you. To be honest when dealing with amr stuff we found 
>>> that it is difficult to retrieve informations from specifications (or at 
>>> least I had no much time to do it...) and helped ourselves by looking 
>>> directly h223 dumps coming from 3g mobiles.
>> btw: what about having dump files which we can analyze with wireshark? I 
>> know at least that it supports h245 and should also support AMR. But I 
>> have no clue how to export the data to feed it into wireshark.
>>
> Wireshark is for me a fundamental instrument and I used it widely when 
> dealing with h324m (and above all with amr).
> 
> I use to analize h223_*in.raw or h223_*out.raw files that libh324m logs 
>   in /tmp directory
> These are the steps to import it into wireshark:
> 
> 1) $ od -v -Ax -tx1 h223_1975da90_in.raw | text2pcap -d -m 5000 
> -T1234,1234 - nokia.pcap
> 
> 2) $ wireshark nokia.pcap
> 
> 3) Analyze->Decode As then click on Transport, select "both" on TCP and 
> H223 on the protocol list.
> 
> 4) Then I use to export everything in a txt file becouse according to me 
> it's easier to analyze:
>     File->Export->"As plain text". select "all expanded" and click ok	
> 
> The result is a text file very easy to analyze in which you find 
> everything mobile phone has said to libh324m in a human readable way.
> 
> Greeting
> Francesco
> 
> ps. I'm using Wireshark 0.99.4
> 
>> regards
>> klaus
>>
>>
>>
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> 
>