Hi,
Thanks for the detailed explanation. It's really useful. I'm trying to automate this whole process. All tools except Ethereal (tcpdump, rtpdump, voiceage decoder) are command line tools that can be used in a batch/shell script. How can I export rtp stream without using Ethereal, or from command line ?
is there a way ?
Thanks, ilker
-----Original Message----- From: Andres [mailto:andres@telesip.net] Sent: Monday, July 24, 2006 8:18 PM To: İlker Aktuna (Koç.net) Cc: serusers@iptel.org Subject: Re: [Serusers] decoding g729 encoded rtp streams
İlker Aktuna (Koç.net) wrote:
Hi,
Thanks for the information. Actually, I downloaded it but couldn't find how to export rtp payload. Does rtpdump read capture files recorded with Ethereal/tcpdump ? (in which format should I save the file?)
Btw, there is a Windows sniffer named "Cain & Abel" this one decodes g729.
Thanks, ilker
First you export the RTP data from within Ethereal like this: 1. Open Capture 2. Click on Analyze->Statistics->RTP Streams->Show All 3. Select the stream you want to export 4. Click 'Save As' 5. Then feed that file into rtpdump like the below example 'trace.rtp'.
Here is the command line: rtpdump -F payload -f trace.rtp -o file.out
file.out will contain just the payload which can then be decoded.
-----Original Message----- From: Andres [mailto:andres@telesip.net] Sent: Friday, July 21, 2006 10:53 PM To: İlker Aktuna (Koç.net) Cc: serusers@iptel.org Subject: Re: [Serusers] decoding g729 encoded rtp streams
İlker Aktuna (Koç.net) wrote:
Hi,
I know that there are licence and patent issues but is it possible to decode g729 encoded rtp streams with any software ? I have licenced Eybeam softphone with g729 support. But it can only decode streams in a conversation. I just need to decode streams recorded with tcpdump/ethereal.
Once I had used a software with this feature but then it turned out to be a trojan. I don't remember the name now. Is there any other software ? (or method using Eyebeam ?)
Thanks, ilker
You can download the decoder from: http://www.voiceage.com/openinit_g729.php
Then capture the RTP Stream with Ethereal and export the Payload (using rtpdump from http://www.cs.columbia.edu/IRT/software/rtptools/).
You can then decode it with the above software.
_____________________________________________________________________________________________________________________________________________ Bu e-posta mesaji kisiye ozel olup, gizli bilgiler iceriyor olabilir. Eger bu e-posta mesaji size yanlislikla ulasmissa, icerigini hic bir sekilde kullanmayiniz ve ekli dosyalari acmayiniz. Bu durumda lutfen e-posta mesajini kullaniciya hemen geri gonderiniz ve tum kopyalarini mesaj kutunuzdan siliniz. Bu e-posta mesaji, hic bir sekilde, herhangi bir amac icin cogaltilamaz, yayinlanamaz ve para karsiligi satilamaz. Bu e-posta mesaji viruslere karsi anti-virus sistemleri tarafindan taranmistir. Ancak yollayici, bu e-posta mesajinin - virus koruma sistemleri ile kontrol ediliyor olsa bile - virus icermedigini garanti etmez ve meydana gelebilecek zararlardan dogacak hicbir sorumlulugu kabul etmez. This message is intended solely for the use of the individual or entity to whom it is addressed , and may contain confidential information. If you are not the intended recipient of this message or you receive this mail in error, you should refrain from making any use of the contents and from opening any attachment. In that case, please notify the sender immediately and return the message to the sender, then, delete and destroy all copies. This e-mail message, can not be copied, published or sold for any reason. This e-mail message has been swept by anti-virus systems for the presence of computer viruses. In doing so, however, sender cannot warrant that virus or other forms of data corruption may not be present and do not take any responsibility in any occurrence. _____________________________________________________________________________________________________________________________________________
İlker Aktuna (Koç.net) wrote:
Hi,
Thanks for the detailed explanation. It's really useful. I'm trying to automate this whole process. All tools except Ethereal (tcpdump, rtpdump, voiceage decoder) are command line tools that can be used in a batch/shell script. How can I export rtp stream without using Ethereal, or from command line ?
is there a way ?
There probably is a way but I have not have the need to investigate. You can try googling around and you will find related discussions like: http://www.ethereal.com/lists/ethereal-dev/200309/msg00152.html
Thanks, ilker
-----Original Message----- From: Andres [mailto:andres@telesip.net] Sent: Monday, July 24, 2006 8:18 PM To: İlker Aktuna (Koç.net) Cc: serusers@iptel.org Subject: Re: [Serusers] decoding g729 encoded rtp streams
İlker Aktuna (Koç.net) wrote:
Hi,
Thanks for the information. Actually, I downloaded it but couldn't find how to export rtp payload. Does rtpdump read capture files recorded with Ethereal/tcpdump ? (in which format should I save the file?)
Btw, there is a Windows sniffer named "Cain & Abel" this one decodes g729.
Thanks, ilker
First you export the RTP data from within Ethereal like this:
- Open Capture
- Click on Analyze->Statistics->RTP Streams->Show All 3. Select the stream you want to export 4. Click 'Save As'
- Then feed that file into rtpdump like the below example 'trace.rtp'.
Here is the command line: rtpdump -F payload -f trace.rtp -o file.out
file.out will contain just the payload which can then be decoded.
-----Original Message----- From: Andres [mailto:andres@telesip.net] Sent: Friday, July 21, 2006 10:53 PM To: İlker Aktuna (Koç.net) Cc: serusers@iptel.org Subject: Re: [Serusers] decoding g729 encoded rtp streams
İlker Aktuna (Koç.net) wrote:
Hi,
I know that there are licence and patent issues but is it possible to decode g729 encoded rtp streams with any software ? I have licenced Eybeam softphone with g729 support. But it can only decode streams in a conversation. I just need to decode streams recorded with tcpdump/ethereal.
Once I had used a software with this feature but then it turned out to be a trojan. I don't remember the name now. Is there any other software ? (or method using Eyebeam ?)
Thanks, ilker
You can download the decoder from: http://www.voiceage.com/openinit_g729.php
Then capture the RTP Stream with Ethereal and export the Payload (using rtpdump from http://www.cs.columbia.edu/IRT/software/rtptools/).
You can then decode it with the above software.
Bu e-posta mesaji kisiye ozel olup, gizli bilgiler iceriyor olabilir. Eger bu e-posta mesaji size yanlislikla ulasmissa, icerigini hic bir sekilde kullanmayiniz ve ekli dosyalari acmayiniz. Bu durumda lutfen e-posta mesajini kullaniciya hemen geri gonderiniz ve tum kopyalarini mesaj kutunuzdan siliniz. Bu e-posta mesaji, hic bir sekilde, herhangi bir amac icin cogaltilamaz, yayinlanamaz ve para karsiligi satilamaz. Bu e-posta mesaji viruslere karsi anti-virus sistemleri tarafindan taranmistir. Ancak yollayici, bu e-posta mesajinin - virus koruma sistemleri ile kontrol ediliyor olsa bile - virus icermedigini garanti etmez ve meydana gelebilecek zararlardan dogacak hicbir sorumlulugu kabul etmez. This message is intended solely for the use of the individual or entity to whom it is addressed , and may contain confidential information. If you are not the intended recipient of this message or you receive this mail in error, you should refrain from making any use of the contents and from opening any attachment. In that case, please notify the sender immediately and return the message to the sender, then, delete and destroy all copies. This e-mail message, can not be copied, published or sold for any reason. This e-mail message has been swept by anti-virus systems for the presence of computer viruses. In doing so, however, sender cannot warrant that virus or other forms of data corruption may not be present and do not take any responsibility in any occurrence. _____________________________________________________________________________________________________________________________________________
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Andres -
İlker Aktuna (Koç.net)