5 thoughts on - Codec Question

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  The literals “wav” and “mp3” are unknown as far as media handling goes. We’d need to see what payload types they translate them to. If you can get a real SDP from one of those devices we could say more.

• Docs said this:
  Audio Codecs: G.711, G.726, WAV, MP3.

  This is all it shows:
  Got SDP version 3801411990 and unique parts [- 3801411989 IN IP4
  192.168.2.3]
  Found RTP audio format 0
  Found RTP audio format 101
  Found audio description format PCMU for ID 0
  Found audio description format telephone-event for ID 101
  Capabilities: us – (ulaw|alaw|gsm), peer –
  audio=(ulaw)/video=(nothing)/text=(nothing), combined – (ulaw)
  Non-codec capabilities (dtmf): us – 0x1 (telephone-event|), peer – 0x1
  (telephone-event|), combined – 0x1 (telephone-event|)
  Peer audio RTP is at port 192.168.2.3:4138

  Something is not right.

  Jerry

• I thought – what about the software – maybe it needs updated. After doing so I get a list:

  Audio codecs PCMU (8000 Hz)
  PCMA (8000 Hz)
  opus (48000 Hz)
  L16/16000 (16000 Hz)
  G.726-32 (8000 Hz)
  L16/8000 (8000 Hz)
  speex/16000 (16000 Hz)
  speex/8000 (8000 Hz)

• Ok – updating the firmware on teh device – factory reset, re-config. Capabilities: us – (g726|slin16|ulaw|alaw|gsm), peer –
  audio=(ulaw|alaw|g726|slin16)/video=(nothing)/text=(nothing), combined –
  (g726|slin16|ulaw|alaw)
  Looking much better.

  Jerry

• turn off g726.

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