ffmpeg and mapping against 2 target audio tracks!
Use

ffmpeg -loglevel verbose -i test.mov -map 0:1 -map 0:2
-codec:a:0 aac -b:a:0 160k  -codec:a:1 eac3 -ac:a:1 6 -ar:a:1 48000 -b:a:1 640k -dialnorm -24 -dsur_mode 0 -original 1 -dmix_mode 2 -channel_layout 63 -y test.ts

acodec is an alias for codec:a and it does not accept stream specifiers. Same goes for other codec-related options like bitrate.