google speech api Invalid recognition - google-cloud-platform

Question

I am trying to follow the example on google speech api found here
https://cloud.google.com/speech/docs/getting-started
1) I created the follow json request file
{
'config': {
'encoding':'FLAC',
'sampleRate': 16000,
'languageCode': 'en-US'
},
'audio': {
'uri':'gs://cloud-samples-tests/speech/brooklyn.flac'
}
}
2) Authenticate to my service account
gcloud auth activate-service-account --key-file=service-account-key-file
3) Obtain my authorization token successfully
gcloud auth print-access-token
access_token
4) Then use the following curl command
curl -s -k -H "Content-Type: application/json" \
-H "Authorization: Bearer access_token" \
https://speech.googleapis.com/v1beta1/speech:syncrecognize \
-d #sync-request.json
But I keep getting the following response
{
"error": {
"code": 400,
"message": "Invalid recognition 'config': bad encoding..",
"status": "INVALID_ARGUMENT"
}
}
Do I need access permissions for the uri gs://cloud-samples-tests/speech/brooklyn.flac? Is that what the problem is?
Thanks in advance..

Answer 1

In my opinion, it is a file format issue.
You have to send WAV file instead of FLAC ...
[ FLAC and MP3 format are not supported <=> need a file conversion (representing cost) on the server side ]
Convert your audio file to WAV (using ffmpeg or avconv), then retry.
You may also take a look here (to see a working example)

Answer 2

For me, the solution was to remove the space between "-d #",
so change "-d #sync-request.json" to "-d#sync-request.json".
I got help here: https://groups.google.com/forum/#!topic/cloud-speech-discuss/bL_N5aJDG5A. Apparently the file was being read and processed, but the parms were going to the "curl.exe" instead of being passed to the URL.

Answer 3

I understand this is quite late for an answer. However, it might help others so putting in your error.
The config that you are passing is actually incorrect. The attributes should be like:
{
"config": {
"encoding": "LINEAR16",
"sampleRateHertz": 16000,
"languageCode": "en-US",
"maxAlternatives": 1,
"profanityFilter": true,
"enableWordTimeOffsets": false
},
"uri": {
"content":"<your uri>"
}
}