Transcribe a multi-channel file in Cloud Storage

  /** 
 * Transcribe a remote audio file with multi-channel recognition 
 * 
 * @param gcsUri the path to the audio file 
 */ 
 public 
  
 static 
  
 void 
  
 transcribeMultiChannelGcs 
 ( 
 String 
  
 gcsUri 
 ) 
  
 throws 
  
 Exception 
  
 { 
  
 try 
  
 ( 
 SpeechClient 
  
 speechClient 
  
 = 
  
 SpeechClient 
 . 
 create 
 ()) 
  
 { 
  
 // Configure request to enable multiple channels 
  
 RecognitionConfig 
  
 config 
  
 = 
  
 RecognitionConfig 
 . 
 newBuilder 
 () 
  
 . 
 setEncoding 
 ( 
 AudioEncoding 
 . 
 LINEAR16 
 ) 
  
 . 
 setLanguageCode 
 ( 
 "en-US" 
 ) 
  
 . 
 setSampleRateHertz 
 ( 
 44100 
 ) 
  
 . 
 setAudioChannelCount 
 ( 
 2 
 ) 
  
 . 
 setEnableSeparateRecognitionPerChannel 
 ( 
 true 
 ) 
  
 . 
 build 
 (); 
  
 // Set the remote path for the audio file 
  
 RecognitionAudio 
  
 audio 
  
 = 
  
 RecognitionAudio 
 . 
 newBuilder 
 (). 
 setUri 
 ( 
 gcsUri 
 ). 
 build 
 (); 
  
 // Use non-blocking call for getting file transcription 
  
 OperationFuture<LongRunningRecognizeResponse 
 , 
  
 LongRunningRecognizeMetadata 
>  
 response 
  
 = 
  
 speechClient 
 . 
 longRunningRecognizeAsync 
 ( 
 config 
 , 
  
 audio 
 ); 
  
 while 
  
 ( 
 ! 
 response 
 . 
 isDone 
 ()) 
  
 { 
  
 System 
 . 
 out 
 . 
 println 
 ( 
 "Waiting for response..." 
 ); 
  
 Thread 
 . 
 sleep 
 ( 
 10000 
 ); 
  
 } 
  
 // Just print the first result here. 
  
 for 
  
 ( 
 SpeechRecognitionResult 
  
 result 
  
 : 
  
 response 
 . 
 get 
 (). 
 getResultsList 
 ()) 
  
 { 
  
 // There can be several alternative transcripts for a given chunk of speech. Just use the 
  
 // first (most likely) one here. 
  
 SpeechRecognitionAlternative 
  
 alternative 
  
 = 
  
 result 
 . 
 getAlternativesList 
 (). 
 get 
 ( 
 0 
 ); 
  
 // Print out the result 
  
 System 
 . 
 out 
 . 
 printf 
 ( 
 "Transcript : %s\n" 
 , 
  
 alternative 
 . 
 getTranscript 
 ()); 
  
 System 
 . 
 out 
 . 
 printf 
 ( 
 "Channel Tag : %s\n" 
 , 
  
 result 
 . 
 getChannelTag 
 ()); 
  
 } 
  
 } 
 } 
 

  const 
  
 speech 
  
 = 
  
 require 
 ( 
 ' @google-cloud/speech 
' 
 ). 
 v1 
 ; 
 // Creates a client 
 const 
  
 client 
  
 = 
  
 new 
  
 speech 
 . 
  SpeechClient 
 
 (); 
 const 
  
 config 
  
 = 
  
 { 
  
 encoding 
 : 
  
 'LINEAR16' 
 , 
  
 languageCode 
 : 
  
 'en-US' 
 , 
  
 audioChannelCount 
 : 
  
 2 
 , 
  
 enableSeparateRecognitionPerChannel 
 : 
  
 true 
 , 
 }; 
 const 
  
 audio 
  
 = 
  
 { 
  
 uri 
 : 
  
 gcsUri 
 , 
 }; 
 const 
  
 request 
  
 = 
  
 { 
  
 config 
 : 
  
 config 
 , 
  
 audio 
 : 
  
 audio 
 , 
 }; 
 const 
  
 [ 
 response 
 ] 
  
 = 
  
 await 
  
 client 
 . 
 recognize 
 ( 
 request 
 ); 
 const 
  
 transcription 
  
 = 
  
 response 
 . 
 results 
  
 . 
 map 
 ( 
  
 result 
  
 = 
>  
 ` Channel Tag: 
 ${ 
 result 
 . 
 channelTag 
 } 
  
 ${ 
 result 
 . 
 alternatives 
 [ 
 0 
 ]. 
 transcript 
 } 
 ` 
  
 ) 
  
 . 
 join 
 ( 
 '\n' 
 ); 
 console 
 . 
 log 
 ( 
 `Transcription: \n 
 ${ 
 transcription 
 } 
 ` 
 ); 
 

  from 
  
 google.cloud 
  
 import 
 speech 
 client 
 = 
 speech 
 . 
 SpeechClient 
 () 
 audio 
 = 
 speech 
 . 
  RecognitionAudio 
 
 ( 
 uri 
 = 
 audio_uri 
 ) 
 config 
 = 
 speech 
 . 
  RecognitionConfig 
 
 ( 
 encoding 
 = 
 speech 
 . 
 RecognitionConfig 
 . 
 AudioEncoding 
 . 
 LINEAR16 
 , 
 sample_rate_hertz 
 = 
 44100 
 , 
 language_code 
 = 
 "en-US" 
 , 
 audio_channel_count 
 = 
 2 
 , 
 enable_separate_recognition_per_channel 
 = 
 True 
 , 
 ) 
 response 
 = 
 client 
 . 
  recognize 
 
 ( 
 config 
 = 
 config 
 , 
 audio 
 = 
 audio 
 ) 
 for 
 i 
 , 
 result 
 in 
 enumerate 
 ( 
 response 
 . 
 results 
 ): 
 alternative 
 = 
 result 
 . 
 alternatives 
 [ 
 0 
 ] 
 print 
 ( 
 "-" 
 * 
 20 
 ) 
 print 
 ( 
 f 
 "First alternative of result 
 { 
 i 
 } 
 " 
 ) 
 print 
 ( 
 f 
 "Transcript: 
 { 
 alternative 
 . 
 transcript 
 } 
 " 
 ) 
 print 
 ( 
 f 
 "Channel Tag: 
 { 
 result 
 . 
 channel_tag 
 } 
 " 
 ) 
 return 
 result 
 

  # storage_path = "Path to file in Cloud Storage, eg. gs://bucket/audio.raw" 
 require 
  
 "google/cloud/speech" 
 speech 
  
 = 
  
 Google 
 :: 
 Cloud 
 :: 
  Speech 
 
 . 
  speech 
 
  
 version 
 : 
  
 :v1 
 config 
  
 = 
  
 { 
  
 encoding 
 : 
  
 :LINEAR16 
 , 
  
 sample_rate_hertz 
 : 
  
 44_100 
 , 
  
 language_code 
 : 
  
 "en-US" 
 , 
  
 audio_channel_count 
 : 
  
 2 
 , 
  
 enable_separate_recognition_per_channel 
 : 
  
 true 
 } 
 audio 
  
 = 
  
 { 
  
 uri 
 : 
  
 storage_path 
  
 } 
 response 
  
 = 
  
 speech 
 . 
 recognize 
  
 config 
 : 
  
 config 
 , 
  
 audio 
 : 
  
 audio 
 results 
  
 = 
  
 response 
 . 
 results 
 results 
 . 
 each_with_index 
  
 do 
  
 | 
 result 
 , 
  
 i 
 | 
  
 alternative 
  
 = 
  
 result 
 . 
 alternatives 
 . 
 first 
  
 puts 
  
 "-" 
  
 * 
  
 20 
  
 puts 
  
 "First alternative of result 
 #{ 
 i 
 } 
 " 
  
 puts 
  
 "Transcript: 
 #{ 
 alternative 
 . 
 transcript 
 } 
 " 
  
 puts 
  
 "Channel Tag: 
 #{ 
 result 
 . 
 channel_tag 
 } 
 " 
 end