Can I Stream the output with Capistrano 3 while the remote command is still running

Question

I'd like to do the same as I could do with Capistrano2

task :memory do 
     run "free | awk '/^Mem:/{print $4}'" do | channel, stream, data |
          puts "host: #{channel[:host]} has free memory of #{data.to_i/1024} MB"
     end
end

Using capture wont help as it only prints after the remote command has finished.