[nashnash]

Primaeval,  thx for your help.  I got further which chanels set up.  But recording is starting and stoping right a way. I think it's the issue of the right ffmpeg binary.  This is nexus player...it kind of show a combination of X86 and arm7a.  I tried the bin in the first posts but none work.  I've decided to replace this nexus player anyway.  Was having sound issue and had to reset it.

I'm thinking of picking up the Shield today.  Can you point me to the exact ffmpeg you've been using with the Shield?  Thanks.