how to record both video and unmixed audio of a group call

Hi,
I need to record a meeting's video as well as unmixed audio stream of the call,
but it seems from the documentation, we can only either record a mixed audioVideo format, or an unmixed multi channel audio format, we can not do both at the same time, I tried to start recording on the same serverCallId 2 times with different format mentioned, that did not work,

is there any way to achieve what I want?