formatting "pacmd list-sink-inputs" using awk

cat exampleOf2Inputs
2 sink input(s) available.
    index: 144
	driver: <protocol-native.c>
	flags:
	state: RUNNING
	sink: 4 <alsa_output.pci-0000_05_00.0.analog-stereo>
	volume: front-left: 15728 /  24% / -37.19 dB,   front-right: 15728 /  24% / -37.19 dB
	        balance 0.00
	muted: no
	current latency: 70.48 ms
	requested latency: 210.00 ms
	sample spec: float32le 2ch 44100Hz
	channel map: front-left,front-right
	             Stereo
	resample method: copy
	module: 13
	client: 245 <MPlayer>
	properties:
		media.name = "UNREAL! Tetris Theme on Violin and Guitar-TnDIRr9C83w.webm"
		application.name = "MPlayer"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "32"
		application.process.id = "1543"
		application.process.user = "mmucha"
		application.process.host = "vbDesktop"
		application.process.binary = "mplayer"
		application.language = "C"
		window.x11.display = ":0"
		application.process.machine_id = "720184179caa46f0a3ce25156642f7a0"
		application.process.session_id = "2"
		module-stream-restore.id = "sink-input-by-application-name:MPlayer"
    index: 145
	driver: <protocol-native.c>
	flags:
	state: RUNNING
	sink: 4 <alsa_output.pci-0000_05_00.0.analog-stereo>
	volume: front-left: 24903 /  38% / -25.21 dB,   front-right: 24903 /  38% / -25.21 dB
	        balance 0.00
	muted: no
	current latency: 70.50 ms
	requested latency: 210.00 ms
	sample spec: float32le 2ch 48000Hz
	channel map: front-left,front-right
	             Stereo
	resample method: speex-float-1
	module: 13
	client: 251 <MPlayer>
	properties:
		media.name = "Trombone Shorty At Age 13 - 2nd Line-k9YUi3UhEPQ.webm"
		application.name = "MPlayer"
		native-protocol.peer = "UNIX socket client"
		native-protocol.version = "32"
		application.process.id = "2831"
		application.process.user = "mmucha"
		application.process.host = "vbDesktop"
		application.process.binary = "mplayer"
		application.language = "C"
		window.x11.display = ":0"
		application.process.machine_id = "720184179caa46f0a3ce25156642f7a0"
		application.process.session_id = "2"
		module-stream-restore.id = "sink-input-by-application-name:MPlayer"






cat exampleOf2Inputs | awk '
    BEGIN { print "[" }
    function print_record() {
        if (count++) {
            print "  {"
            printf "    %s,\n", print_number("pid")
            printf "    %s,\n", print_number("index")
            printf "    %s,\n", print_string("appname")
            printf "    %s\n",  print_string("medianame")
            print "  },"
        }
        delete record
    }
    function print_number(key) { return sprintf("\"%s\": %d", key, record[key]) }
    function print_string(key) { return sprintf("\"%s\": \"%s\"", key, record[key]) }
    function get_quoted_value() {
        if (match($0, /[^"]+"$/)) {
            return substr($0, RSTART, RLENGTH-1)
        else
            return "?"
    }
    $1 == "index:" { print_record(); record["index"] = $2 }
    $1 == "application.process.id" { record["pid"]       = get_quoted_value() }
    $1 == "application.name"       { record["appname"]   = get_quoted_value() }
    $1 == "media.name"             { record["medianame"] = get_quoted_value() }
    END { print_record(); print "]" }
' |    tac | awk '/},$/ && !seen++ {sub(/,$/,"")} 1' | tac
awk: cmd. line:19:         else
awk: cmd. line:19:         ^ syntax error
awk: cmd. line:22:     $1 == "index:" { print_record(); record["index"] = $2 }
awk: cmd. line:22:                    ^ syntax error
awk: cmd. line:23:     $1 == "application.process.id" { record["pid"]       = get_quoted_value() }
awk: cmd. line:23:                                    ^ syntax error
awk: cmd. line:24:     $1 == "application.name"       { record["appname"]   = get_quoted_value() }
awk: cmd. line:24:                                    ^ syntax error
awk: cmd. line:25:     $1 == "media.name"             { record["medianame"] = get_quoted_value() }
awk: cmd. line:25:                                    ^ syntax error
awk: cmd. line:26:     END { print_record(); print "]" }
awk: cmd. line:26:     ^ syntax error
awk: cmd. line:26:     END { print_record(); print "]" }
awk: cmd. line:26:                                      ^ unexpected newline or end of string