SONY IPELA (SNC-EP580) video/audio grab

SONY IPELA (SNC-EP580) video/audio grab

I trying to capture video and audio from my network ip camera Sony SNC-EP580.
I can not capture audio stream. Why?
But I can capture video without audio by ffmpeg: ffmpeg -i
http://camera_ip/h264?audioin=on -vcodec copy -acodec copy -f mp4 -y
"test.mp4"
In "Setup" -> "Camera"-> "Common" I set audio codec on mic volume +3 codec
G.711(64kbps) Dynamic ... off audio upload on, volume +3
In ActiveX app I hear speech. But in captured video from ffmpeg or in
ffplay http://camera_ip:50002 or in ffplay
http://camera_ip/h264?audioin=on or in ffplay http://camera_ip/audio I can
not hear anything
What I am doing wrong?
Maybe someone will be useful: SONY CGI Command manual
http://pro.sony.com.cn/productinfo/vs/downloads/G5%20Camera%20CGI%20manual.pdf