title: How to add g729 codec in Android application?
body: <p>i  am developing a SIP application for making and receiving a call and i want to add the G729 codec in my application.</p>
  
  <p>currently i am doing analysis on open source project <a href="http://code.google.com/p/sipdroid/" rel="nofollow">SipDroid</a>. if i want to make that application to support G729 codec how to do that?</p>
  
  <p>there is a different codecs configuration file in <a href="http://code.google.com/p/sipdroid/source/browse/#svn%2Ftrunk%2Fsrc%2Forg%2Fsipdroid%2Fcodecs" rel="nofollow">org.sipdroid.codecs</a> package.how do create the this kind of .java file for G729 codec?</p>
  
  <p>Any suggestion and response will be appreciated.</p>
  
  <p>Log message of asterisk</p>
  
  <pre><code>Found RTP audio format 101
  Found audio description format telephone-event for ID 101
  Found RTP video format 103
  Found video description format h263-1998 for ID 103
  Capabilities: us - 0x100 (g729), peer - audio=0x0 (nothing)/video=0x100000 (h263p)/text=0x0 (nothing), combined - 0x0 (nothing)
  Non-codec capabilities (dtmf): us - 0x1 (telephone-event|), peer - 0x1 (telephone-event|), combined - 0x1 (telephone-event|)
  [Apr  9 18:00:25] NOTICE[3813]: chan_sip.c:9187 process_sdp: **No compatible codecs**, not accepting this offer!
  </code></pre>
  
  <p><strong>SDP</strong></p>
  
  <pre><code>To: &lt;sip:5003@192.168.1.17&gt;
  From: &lt;sip:5004@192.168.1.17&gt;;tag=z9hG4bK80811693
  Call-ID: 082004294635@10.0.2.15
  CSeq: 2 INVITE
  Contact: &lt;sip:5004@10.0.2.15:36252;transport=udp&gt;
  Expires: 3600
  User-Agent: MySipdroid. !/2.4 beta/sdk
  Authorization: Digest username="5004", realm="asterisk", nonce="6264308a", uri="sip:5003@192.168.1.17", algorithm=MD5, response="fb6dfb528d362657ef01458f96653adb"
  Content-Length: 137
  Content-Type: application/sdp
  
  v=0
  o=5004@192.168.1.17 0 0 IN IP4 10.0.2.15
  s=Session SIP/SDP
  c=IN IP4 10.0.2.15
  t=0 0
  m=audio 21000 RTP/AVP
  a=fmtp:18 annexb=no
  &lt;-------------&gt;
  --- (13 headers 7 lines) ---
  Sending to 192.168.1.17:35370 (NAT)
  Using INVITE request as basis request - 082004294635@10.0.2.15
  Found peer '5004' for '5004' from 192.168.1.17:35370
    == Using SIP RTP CoS mark 5
  Capabilities: us - 0x100 (g729), peer - audio=0x0 (nothing)/video=0x0 (nothing)/text=0x0 (nothing), combined - 0x0 (nothing)
  Non-codec capabilities (dtmf): us - 0x1 (telephone-event|), peer - 0x0 (nothing), combined - 0x0 (nothing)
  [Apr 10 12:01:05] NOTICE[3524]: chan_sip.c:9187 process_sdp: No compatible codecs, not accepting this offer!
  </code></pre>
  
  <p><strong>Result of Show Translation</strong></p>
  
  <pre><code>core show translation
           Translation times between formats (in microseconds) for one second of data
            Source Format (Rows) Destination Format (Columns)
  
             g723   gsm  ulaw  alaw g726aal2 adpcm  slin lpc10  g729 speex  ilbc  g726  g722 siren7 siren14 slin16  g719 speex16 testlaw
       g723     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
        gsm     -     -  1001  1001     3000  2000  1000  3000  3999     -  8999  3999  1001      -       -   1002     -       -    1001
       ulaw     -  2000     -     1     2001  1001     1  2001  3000     -  8000  3000     2      -       -      3     -       -       2
       alaw     -  2000     1     -     2001  1001     1  2001  3000     -  8000  3000     2      -       -      3     -       -       2
   g726aal2     -  2999  1001  1001        -  2000  1000  3000  3999     -  8999  3999  1001      -       -   1002     -       -    1001
      adpcm     -  2000     2     2     2001     -     1  2001  3000     -  8000  3000     2      -       -      3     -       -       2
       slin     -  1999     1     1     2000  1000     -  2000  2999     -  7999  2999     1      -       -      2     -       -       1
      lpc10     -  2999  1001  1001     3000  2000  1000     -  3999     -  8999  3999  1001      -       -   1002     -       -    1001
       g729     -  2999  1001  1001     3000  2000  1000  3000     -     -  8999  3999  1001      -       -   1002     -       -    1001
      speex     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
       ilbc     -  2998  1000  1000     2999  1999   999  2999  3998     -     -  3998  1000      -       -   1001     -       -    1000
       g726     -  2999  1001  1001     3000  2000  1000  3000  3999     -  8999     -  1001      -       -   1002     -       -    1001
       g722     -  2000     2     2     2001  1001     1  2001  3000     -  8000  3000     -      -       -      1     -       -       2
     siren7     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
    siren14     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
     slin16     -  3000  1002  1002     3001  2001  1001  3001  4000     -  9000  4000  1000      -       -      -     -       -    1002
       g719     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
    speex16     -     -     -     -        -     -     -     -     -     -     -     -     -      -       -      -     -       -       -
    testlaw     -  2000     2     2     2001  1001     1  2001  3000     -  8000  3000     2      -       -      3     -       -       -
  </code></pre>
  
  <p><strong>sip.conf</strong></p>
  
  <pre><code>[5004]
  type=friend
  username=5004
  secret=5004
  host=dynamic
  context=testcontext
  nat=yes
  disallow=all
  allow=g729
  qualify=yes
  callerid="919999121312"&lt;5004&gt;
  </code></pre>