Hi Ross.<div>I recently use live555 to relay PCMU rtp streaming from a media server to a rtsp client. </div><div>and pcmu streaming works well on VLC streaming player.</div><div>but now we need to relay the PCMU streaming to cellphone, and lots of cellphone streaming player don't support PCMU codec.</div>
<div>so we have to transcode the PCMU streaming to AAC streaming. and send the AAC streaming to RTSP client. </div><div>I search on the internet and find out that ffmpeg can transcode PCM to AAC. but I don't know how to use ffmpeg </div>
<div>to do it. so if there are some demo about this can help me.</div><div><br></div><div>the framework of my codes as below:</div><div>1. use SimpleRTPSource to get the PCM streaming.</div><div>2. if I need to use ffmpeg to create a new subclass of FramedFiliter to transcode the streaming, and how to use ffmpeg?</div>
<div>3. use AC3audioRTPSink to relay. </div>