for backwards compatibility in gather/transcribe return only 1 alternative at top level (#240)

lib/tasks/config.js

@@ -166,7 +166,7 @@ class TaskConfig extends Task {
 
   async kill(cs) {
     super.kill(cs);
-    if (this.ep && this.stopAmd) this.stopAmd(this.ep, this);
+    //if (this.ep && this.stopAmd) this.stopAmd(this.ep, this);
   }
 
   _onAmdEvent(cs, evt) {

lib/utils/transcription-utils.js

@@ -19,7 +19,7 @@ const normalizeDeepgram = (evt, channel, language) => {
     language_code: language,
     channel_tag: channel,
     is_final: evt.is_final,
-    alternatives,
+    alternatives: [alternatives[0]],
     vendor: {
       name: 'deepgram',
       evt: copy
@@ -50,7 +50,7 @@ const normalizeGoogle = (evt, channel, language) => {
     language_code: language,
     channel_tag: channel,
     is_final: evt.is_final,
-    alternatives: evt.alternatives,
+    alternatives: [evt.alternatives[0]],
     vendor: {
       name: 'google',
       evt: copy
@@ -64,7 +64,7 @@ const normalizeNuance = (evt, channel, language) => {
     language_code: language,
     channel_tag: channel,
     is_final: evt.is_final,
-    alternatives: evt.alternatives,
+    alternatives: [evt.alternatives[0]],
     vendor: {
       name: 'nuance',
       evt: copy
@@ -92,7 +92,7 @@ const normalizeMicrosoft = (evt, channel, language) => {
     language_code,
     channel_tag: channel,
     is_final: evt.RecognitionStatus === 'Success',
-    alternatives,
+    alternatives: [alternatives[0]],
     vendor: {
       name: 'microsoft',
       evt: copy

test/docker-compose-testbed.yaml

@@ -44,7 +44,7 @@ services:
   drachtio:
     image: drachtio/drachtio-server:latest
     restart: always
-    command: drachtio --contact "sip:*;transport=udp,tcp" --address 0.0.0.0 --port 9022
+    command: drachtio --contact "sip:*;transport=udp" --mtu 4096 --address 0.0.0.0 --port 9022
     ports:
       - "9060:9022/tcp"
     networks: