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Rev.ai makes speech applications easy to build!

Project description

Rev.ai Python SDK

Build Status

Documentation

See the API docs for more information about the API and more python examples.

Installation

You don't need this source code unless you want to modify the package. If you just want to use the package, just run:

pip install --upgrade rev_ai

Install from source with:

python setup.py install

Requirements

  • Python 2.7+ or Python 3.4+

Usage

All you need to get started is your Access Token, which can be generated on your Settings Page. Create a client with the given Access Token:

from rev_ai import apiclient

# create your client
client = apiclient.RevAiAPIClient("ACCESS TOKEN")

Sending a file

Once you've set up your client with your Access Token sending a file is easy!

# you can send a local file
job = client.submit_job_local_file("FILE PATH")

# or send a link to the file you want transcribed
job = client.submit_job_url("https://example.com/file-to-transcribe.mp3")

job will contain all the information normally found in a successful response from our Submit Job endpoint.

If you want to get fancy, both send job methods take metadata, callback_url, skip_diarization, skip_punctuation, speaker_channels_count, custom_vocabularies and filter_profanity as optional parameters, these are described in the request body of the Submit Job endpoint.

Checking your file's status

You can check the status of your transcription job using its id

job_details = client.get_job_details(job.id)

job_details will contain all information normally found in a successful response from our Get Job endpoint

Checking multiple files

You can retrieve a list of transcription jobs with optional parameters

jobs = client.get_list_of_jobs()

# limit amount of retrieved jobs
jobs = client.get_list_of_jobs(limits=3)

# get jobs starting after a certain job id
jobs = client.get_list_of_jobs(starting_after='Umx5c6F7pH7r')

jobs will contain a list of job details having all information normally found in a successful response from our Get List of Jobs endpoint

Deleting a job

You can delete a transcription job using its id

client.delete_job(job.id)

All data related to the job, such as input media and transcript, will be permanently deleted. A job can only by deleted once it's completed (either with success or failure).

Getting your transcript

Once your file is transcribed, you can get your transcript in a few different forms:

# as text
transcript_text = client.get_transcript_text(job.id)

# as json
transcript_json = client.get_transcript_json(job.id)

# or as a python object
transcript_object = client.get_transcript_object(job.id)

Both the json and object forms contain all the formation outlined in the response of the Get Transcript endpoint when using the json response schema. While the text output is a string containing just the text of your transcript

Getting captions output

You can also get captions output from the SDK. We offer both SRT and VTT caption formats. If you submitted your job as speaker channel audio then you must also provide a channel_id to be captioned:

captions = client.get_captions(job.id, content_type=CaptionType.SRT, channel_id=None)

Streamed outputs

Any output format can be retrieved as a stream. In these cases we return the raw http response to you. The output can be retrieved via response.content, response.iter_lines() or response.iter_content().

text_stream = client.get_transcript_text_as_stream(job.id)

json_stream = client.get_transcript_json_as_stream(job.id)

captions_stream = client.get_captions_as_stream(job.id)

Streaming audio

In order to stream audio, you will need to setup a streaming client and a media configuration for the audio you will be sending.

from rev_ai.streamingclient import RevAiStreamingClient
from rev_ai.models import MediaConfig

#on_error(error)
#on_close(code, reason)
#on_connected(id)

config = MediaConfig()
streaming_client = RevAiStreamingClient("ACCESS TOKEN",
                                        config,
                                        on_error=ERRORFUNC,
                                        on_close=CLOSEFUNC,
                                        on_connected=CONNECTEDFUNC)

on_error, on_close, and on_connected are optional parameters that are functions to be called when the websocket errors, closes, and connects respectively. The default on_error raises the error, on_close prints out the code and reason for closing, and on_connected prints out the job ID. If passing in custom functions, make sure you provide the right parameters. See the sample code for the parameters.

Once you have a streaming client setup with a MediaConfig and access token, you can obtain a transcription generator of your audio. You can also use a custom vocabulary with your streaming job by supplying the optional custom_vocabulary_id when starting a connection!

More optional parameters can be supplied when starting a connection, these are metadata and filter_profanity. For a description of these optional parameters look at our streaming documentation.

response_generator = streaming_client.start(AUDIO_GENERATOR, custom_vocabulary_id="CUSTOM VOCAB ID")

response_generator is a generator object that yields the transcription results of the audio including partial and final transcriptions. The start method creates a thread sending audio pieces from the AUDIO_GENERATOR to our [streaming] endpoint.

If you want to end the connection early, you can!

streaming_client.end()

Otherwise, the connection will end when the server obtains an "EOS" message.

Submitting Custom Vocabularies

In addition to passing custom vocabularies as parameters in the async api client, you can create and submit your custom vocabularies independently and directly to the custom vocabularies api, as well as check on their progress.

Primarily, the custom vocabularies client allows you to submit and preprocess vocabularies for use with the streaming client, in order to have streaming jobs with custom vocabularies!

In this example you see how to construct custom vocabulary objects, submit them to the api, and check on their progress - and metadata!

from rev_ai import custom_vocabularies_client
from rev_ai.models import CustomVocabulary
# Create a client
client = custom_vocabularies_client.RevAiCustomVocabulariesClient("ACCESS TOKEN")

# Construct a CustomVocabulary object using your desired phrases
custom_vocabulary = CustomVocabulary(["Patrick Henry Winston", "Robert C Berwick", "Noam Chomsky"])

# Submit the CustomVocabulary
custom_vocabularies_job = client.submit_custom_vocabularies([custom_vocabulary])

# View the job's progress
job_state = client.get_custom_vocabularies_information(custom_vocabularies_job['id'])

For more details, check out the custom vocabularies example in our examples.

For Rev.ai Python SDK Developers

Remember in your development to follow the PEP8 style guide. Your code editor likely has Python PEP8 linting packages which can assist you in your development.

======= History

0.0.0 (2018-09-28)

  • Initial alpha release

2.1.0

  • Revamped official release

2.1.1

  • File upload bug fixes

2.2.1

  • Better Documentation

2.2.2

  • Fix pypi readme formatting

2.3.0

  • Add get_list_of_jobs

2.4.0

  • Add support for custom vocabularies

2.5.0

  • Add examples
  • Improve error handling
  • Add streaming client

2.6.0

  • Support skip_punctuation
  • Support .vtt captions output
  • Support speaker channel jobs

2.6.1

  • Add metadata to streaming client

2.7.0

  • Add custom vocabularies to streaming client

2.7.1

  • Use v1 of the streaming api
  • Add custom vocabulary to async example
  • Add filter_profanity to async and streaming clients, examples, and documentation
  • Add remove_disfluencies to async client

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