API request for STT works fine with specifying a URL, but not when base64 encoding the file

[ewheelerinc]

We are testing out the Deepgram API for STT and are having an issue getting base64-encoded audio requests to work. However, it works fine when we specify a URL.

These are the two requests:

-= WORKS =-
curl --request POST \ --url 'https://api.deepgram.com/v1/listen?filler_words=false&summarize=v2' \ --header 'Authorization: Token XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX' \ --header 'accept: application/json' \ --header 'content-type: application/json' \ --data ' { "url": "https://www.linuxglobal.com/out/t.wav" } '

-= DOES NOT WORK =-
`
BASE64=$(base64 -w0 /tmp/t.wav)

curl --request POST
--url 'https://api.deepgram.com/v1/listen?filler_words=false&summarize=v2'
--header 'Authorization: Token 449eff8d18907a56b66b8f1ff2df2c8d08690f92'
--header 'accept: application/json'
--data "data:audio/x-wav;name=t.wav;base64,$BASE64"
`

Result:

{ "err_code" : "Bad Request", "err_msg" : "Bad Request: failed to process audio: corrupt or unsupported data", "request_id" : "63b79b92-e8f7-43b2-8c49-b50def803954" }

What are we doing wrong? Note that the demo (https://developers.deepgram.com/reference/pre-recorded) also has "--header 'content-type: application/json'" in the cURL request, but that just results in a different error:

{ "err_code" : "Bad Request", "err_msg" : "Content-type was application/json, but we could not process the JSON payload.", "request_id" : "0e5d9bf1-af75-40da-83a2-cbdcc8526fdf" }

It is also worth noting that the cURL requests are pulled from the demo itself, and I even tried running it from the demo and it just is not working unless I specify a URL, but we need file-based transcript generation, not URL-based.

[DamienDeepgram]

You can find how to transcribe a local file here: https://developers.deepgram.com/docs/transcribing-pre-recorded-audio#transcribe-a-local-file

curl
--request POST
--header 'Authorization: Token YOUR_DEEPGRAM_API_KEY'
--header 'Content-Type: audio/wav'
--data-binary @youraudio.wav
--url 'https://api.deepgram.com/v1/listen'

Also make sure to rotate the API Key you posted above

[ewheelerinc]

That worked, thanks! It is interesting that the demo with pre-recorded does not provide the proper POST request. You might update the demo code so that it works when uploading a file.

Question: Is there a content-type for raw MULAW?