See stream naming scheme below. The example is provided with H.264 and Speex codecs.
RSGW - AV - Model-2

Examples:

1. Stream1. da0ac9910ab2a785a5372a9db2465116@192.168.1.5 – H.264+Speex

2. Stream4. INCOMING_VKP005_da0ac9910ab2a785a5372a9db2465116@192.168.1.5 – Speex

3. Stream5. VIDEO_INCOMING_VKP005_da0ac9910ab2a785a5372a9db2465116@192.168.1.5 – H.264

As you can see the stream names have the same call_id da0ac9910ab2a785a5372a9db2465116 in the naming scheme.