Does JMF support audio PCMA or PCMU codec?

Hi experts,
The first thing I must say that I'm really not good at audio/video/codec field, so I'm not sure I can use the term exactly. Please correct me if any mistakes.
I use JMF and make a desktop application to record my voice, and packetize to RTP packet formatted with ULAW_RTP, GSM_RTP or Gxxx_RTP before sending them to my other android application. My Android app supports two codecs - PCMA and PCMU, and it cannot understand those packets sent from the desktop one.
So I wonder if I can use JMF to create RTP packet which is understandable for Android. Does anyone experience on this problem?
Thanks,
H
Edited by: 866652 on Jun 17, 2011 8:56 AM
I must correct something after reading several lovely complains of Andrew Thompson :-)

hoangtuansu wrote:
their payloadtype's value is the same, in this case is 0. But Android can not undersatnd it, and in addition, their ULAW packet's size is also different, from Android -> PC (PC can understand) is 172 but the one from PC->Android is 492 (???). Things like sample rate, sample size, number of channels, etc will affect the packet size. Additionally, mobile devices may very well have a lower MTU than a normal machine, so that can affect it too.
Even then, there's nothing saying how big an RTP packet should be, how many encoded samples it should hold, etc. So it could be a simple as the PC packing more data per packet.
Most likelly the issue is that Android is 0-4 years old, whereas JMF is 12 years old... so it's almost definately using different versions of the RTP standard.

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