Invalid image data: the provided image data is not correctly formatted in base64.

The 400 status error in the Azure OpenAI API when dealing with base64 image data can be attributed to several factors:

Invalid Payload Structure

The payload may not be correctly formatted, particularly the content keys, which need to be objects rather than strings. For example, the content field might be expected to be an array of content objects with specific types (e.g., text or image_url)[4'.

Content Type and Format

The base64 encoded image may not be properly structured or may not match the expected format. For instance, the API might expect an image_url type with a specific base64 format, but the provided data does not conform to this expectation.

Exceeding Data Payload Size

The base64 encoded image data might exceed the maximum size allowed by the OpenAI API, leading to the server rejecting the request.

Content Filter and Policy Violations

The image data could be triggering content filters or violating Azure OpenAI's content management policies, causing the request to be filtered out.

Incorrect API Endpoint or Version

Issues related to the specific API endpoint or version being used can also lead to errors. The endpoint or version might not support base64 image data as expected, or there could be changes in the API that are not accounted for in the current implementation.

Header and Authentication Issues

Incorrect headers, such as an invalid Content-Type or improperly configured Authorization field, can also result in a 400 error.