openai
#10117
input_validation_error
Invalid base64 format detected in image_url. Please ensure the input is correctly encoded in base64 format.
This error has been identified and solved.
Reason
The "400 Invalid base64 image_url" error in the OpenAI API can be triggered by several reasons:
Incorrect Format of the Base64 String
The base64 encoded image may not be properly formatted. For example, the string might be missing the correct prefix (data:image/jpeg;base64, or data:image/png;base64,) or could contain errors within the base64 data itself.
Incorrect Payload Structure
The payload sent to the API might not be structured correctly. Specifically, the content keys should be objects rather than strings, and the image_url field should be properly nested within the payload.
Model Specific Requirements
The error could be due to the specific requirements of the model being used. For instance, some models like gpt-4-vision-preview strictly require a Base64 encoded string and do not accept URLs.
Network or Server Issues
Although less likely, network issues or server-side problems could also result in a 400 error, indicating a bad request that the server cannot process.
Solution
To fix the "400 Invalid base64 image_url" error in the OpenAI API, you need to ensure the following:
Correct Base64 Format: Verify that the base64 encoded image string is correctly formatted, including the appropriate prefix (e.g.,
data:image/jpeg;base64,ordata:image/png;base64,).Proper Payload Structure: Ensure the payload is structured correctly, with
contentkeys as objects and theimage_urlfield properly nested.Model Compliance: Confirm that the base64 encoded string meets the specific requirements of the model you are using, such as
gpt-4-vision-preview.Network and Server Check: Rule out any network or server-side issues that could be causing the error.
Here are some key points to check:
Remove any newline characters or whitespace from the base64 string.
Ensure the base64 string is not truncated or corrupted.
Validate the payload structure against the API documentation.
Test the API call with a simple text prompt to isolate if the issue is specific to the image.
