Error Couldn't find <s> in first frame (ES language model)

[edwardffs]

I'm currently being flooded with this error in the logcat. The app still runs, but it recognizes the words very poorly. What could I be doing wrong?

[nshmyrev]

You need to provide a bit more details on the code you use to get help.

[edwardffs]

Thank you for the fast reply! Here's what I've done:

I downloaded these files to work with Spanish
https://sourceforge.net/projects/cmusphinx/files/Acoustic%20and%20Language%20Models/Spanish/

Reduced the Dictionary to only these words

anomalía a n o m a l i a
atrás a t r a s
listo l i s t o
listo(2) l i s t a
listo(3) l i s t a s
listo(4) l i s t o s
pausa p a u s a
pausa(2) p a u s a r
pausa(3) p a u t a s
repetir rr e p e t i r
repetir(2) rr e p e t i d o
repetir(3) rr e p e t i r s e
repetir(4) rr e p e t i r

And made my activity like this:

public class MainActivity extends AppCompatActivity implements RecognitionListener {

    private static final int PERMISSIONS_REQUEST_RECORD_AUDIO = 1;
    private static final String SEARCH = "helda";

    private SpeechRecognizer recognizer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        int permissionCheck = ContextCompat.checkSelfPermission(getApplicationContext(), Manifest.permission.RECORD_AUDIO);
        if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, PERMISSIONS_REQUEST_RECORD_AUDIO);
            return;
        }

        new SetupTask(this).execute();

    }

    private static class SetupTask extends AsyncTask<Void, Void, Exception> {
        WeakReference<MainActivity> activityReference;

        SetupTask(MainActivity activity) {
            this.activityReference = new WeakReference<>(activity);
        }

        @Override
        protected Exception doInBackground(Void... params) {
            try {
                Assets assets = new Assets(activityReference.get());
                File assetDir = assets.syncAssets();
                activityReference.get().setupRecognizer(assetDir);
            } catch (IOException e) {
                return e;
            }
            return null;
        }

        @Override
        protected void onPostExecute(Exception result) {
            if (result != null) {
                Log.d("STT LOG", "FAIL: " + result);
            } else {
                activityReference.get().switchSearch(SEARCH);
                Log.d("STT LOG", "POST EXECUTE SUCCESS");
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        if (requestCode == PERMISSIONS_REQUEST_RECORD_AUDIO) {
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                new SetupTask(this).execute();
            } else {
                finish();
            }
        }
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (recognizer != null) {
            recognizer.cancel();
            recognizer.shutdown();
        }
    }

    @Override
    public void onPartialResult(Hypothesis hypothesis) {
        if (hypothesis != null) {
            Log.d("STTLOGGOT onPartial ", hypothesis.getHypstr());
        } else {
            Log.d("STTLOG onPartialResult", "HYPOTHESIS IS NULL");
        }
        switchSearch(SEARCH);
    }

    @Override
    public void onResult(Hypothesis hypothesis) {
        if (hypothesis != null) {
            Log.d("STTLOGGOT onResult ", hypothesis.getHypstr());
        } else {
            Log.d("STTLOG onResult", "HYPOTHESIS IS NULL");
        }
    }

    @Override
    public void onBeginningOfSpeech() {
        Log.d("STTLOG", "BEGINNING OF SPEECH");
    }

    @Override
    public void onEndOfSpeech() {
        Log.d("STTLOG", "END OF SPEECH");
        switchSearch(SEARCH);
    }

    private void switchSearch(String searchName) {
        recognizer.stop();
        if (searchName.equals(SEARCH)) {
            recognizer.startListening(searchName);
        } else {
            recognizer.startListening(searchName, 10);
        }
    }

    private void setupRecognizer(File assetsDir) throws IOException {

        recognizer = SpeechRecognizerSetup.defaultSetup()
                .setFloat("-vad_threshold", 2.0)
                .setAcousticModel(new File(assetsDir, "es-ptm"))
                .setDictionary(new File(assetsDir, "es.dict"))
                .getRecognizer();
        recognizer.addListener(this);
        File languageModel = new File(assetsDir, "es_model.lm");
        recognizer.addNgramSearch(SEARCH, languageModel);

        switchSearch(SEARCH);
    }

    @Override
    public void onError(Exception e) {
        Log.d("STTLOG", e.toString());
    }

    @Override
    public void onTimeout() {
        switchSearch(SEARCH);
    }
}

[nshmyrev]

You need to provide es_model.lm

[edwardffs]

As I said, I downloaded it from the link I gave:
https://sourceforge.net/projects/cmusphinx/files/Acoustic%20and%20Language%20Models/Spanish/
I didn't alter it at all

[nshmyrev]

There is no file es_model.lm at that link.

[edwardffs]

es_model.zip
It is the second one, but I attached it anyway

[nshmyrev]

You need to provide logcat output and raw audio files.

[anuragsoftware]

instead of recognizer.startListening(searchName, 10);
you should use
recognizer.startListening(searchName, 10000); // i.e. 10 second sound recording buffer