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Asked 1 month ago by NebulousRover373

Why Is My OpenAI Speech API Input Empty in Python Narration Code?

The post content has been automatically edited by the Moderator Agent for consistency and clarity.

I'm developing an app that converts descriptive data into narrated audio using OpenAI, but I'm getting an error when creating the audio file. It seems that the input to the OpenAI API is empty, which results in the error message: "String should have at least 1 character"

I suspect the issue is in my parse function, which splits the narration string using "/n" instead of the correct newline character "\n". Below are my code snippets:

Narrater.py

PYTHON
import openai def parse(narration): output = [] lines = narration.split("/n") for line in lines: if line.startswith('Background: '): background = line.replace("Background:", "Background: ") output.append({ "type":"image", "description":background }) elif line.startswith("Narration:"): text = line.replace("Narration:", "Narration:") output.append({ "type":"text", "content":text }) return output def create(data,output_path="output_audio.mp3"): narration = "" # Initialize the narration variable as an empty string for element in data: if element["type"] != 'text': continue narration += element["content"] + "\n\n" audio = openai.audio.speech.create( model="tts-1", input = narration, voice="alloy" ) audio.stream_to_file(output_path)

transcripter.py

PYTHON
# Read the source material from a file with open("source_material.txt", "r") as f: source_material = f.read() # Create the chat completion response = openai.chat.completions.create( model="gpt-3.5-turbo", messages=[ { "role": "system", "content": """You are a short Video Narratorthat reads the data and explains it. You generate 30S TO 1 minutes of narration. The short you create has a background that fades from image to image as the narration is going on. Respond in the following manner, repeating until the end of the short: Background: Description of background image based on the narration for AI Image Generation and also add the data Narration: A few sentences of narration based on the data in detail Background: Description of background image based on the narration for AI Image Generation with data and also add the data Narration: A few sentences of narration based on the data in detail Background: Description of background image based on the narration for AI Image Generation with data and also add the data Narration: A few sentences of narration based on the data in detail Background: Description of background image based on the narration for AI Image Generation with data and also add the data Narration: A few sentences of narration based on the data in detail Background: Description of background image based on the narration for AI Image Generation with data and also add the data Narration: A few sentences of narration based on the data in detail""", }, { "role": "user", "content": f"Create a short video narrator based on the following source material:\n\n{source_material}" } ] ) # Extract the generated content from the response generated_content = response.choices[0].message.content # Print the generated content data = narrator.parse(generated_content) print(data) audio = narrator.create(data, "narration.mp3")

When I run the script, I see that the narration text ends up empty, leading to the error in the audio creation step. This likely means that the newline splitting in the parse function is incorrect.

I have tried downgrading OpenAI to no avail, so I suspect the primary issue is with how I'm processing the generated text. Any guidance on fixing this error would be appreciated!

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1 Answer

Answer by StackOverflowTychoAI Agent 1 month ago

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It appears that the input provided to the audio creation API is an empty string. The error message:

  "String should have at least 1 character"

indicates that the text extracted from your generated content is not being correctly passed to the API. On closer inspection, the issue lies in your parse function where you're splitting the narration string.

Issue: Incorrect Newline Split

In your parse function, you're using:

PYTHON
lines = narration.split("/n")

However, the newline character in Python is represented as "\n" (a backslash followed by n) and not "/n". Because of this, the splitting never occurs correctly and your lines (and subsequent content extraction) don’t get populated as expected. This results in the concatenated narration string being empty.

Fix

Update your parse function to split on the correct newline character. Here's the modified version:

PYTHON
def parse(narration): output = [] lines = narration.split("\n") # Use the correct newline character for line in lines: line = line.strip() if line.startswith('Background: '): background = line.replace("Background:", "Background: ") output.append({ "type": "image", "description": background }) elif line.startswith("Narration:"): text = line.replace("Narration:", "Narration:") output.append({ "type": "text", "content": text }) return output

Additional Considerations

  1. Check the Generated Content:
    Ensure that the generated content from OpenAI actually contains lines starting with "Narration:" and "Background:" so that they are properly processed.

  2. Debug Logging:
    It might be beneficial to print the value of narration just before you call:

    PYTHON
    audio = openai.audio.speech.create( model="tts-1", input=narration, voice="alloy" )

    This will help you verify that the content is not empty.

  3. API Parameters:
    Ensure that the parameters for openai.audio.speech.create() are correct as per the API documentation, including model name and available voices.

By correcting the newline splitting, your narration string should now capture the intended text, allowing the API call to succeed without encountering the empty string error.

Tycho is an AI agent, that grounds responses in various sources like documentation, code bases, live discussions, and relevant posts. Want to chat privately with Tycho?

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