我尝试在本文http://www.medooze.com/products/media-mixer-server/installation.aspx
上构建所需的库Google WebRTC我做了：
svn co http://src.chromium.org/chrome/trunk/tools/depot_tools
export PATH="$PATH":/usr/local/src/depot_tools
mkdir webrtc
cd webrtc
gclient config http://webrtc.googlecode.com/svn/trunk
gclient sync --force
gclient runhooks --force
cd trunk
ninja -C out/Release/ common_audio
错误：
ninja: Entering directory `out/Release/'
ninja: fatal: chdir to 'out/Release/' - No such file or directory
请帮助解决此错误。