A more obvious example of audio to text transcription

[kbgod]

Problem: Unclear io.Reader Expectations for Audio Transcription
Today, I encountered an issue with the openai.AudioTranscriptionNewParams.File field, where the expected behavior of an io.Reader was not immediately obvious.

As a developer, when a function or method expects an io.Reader, I typically anticipate that only the Read method will be necessary. However, upon inspection of the library's internal code, it became clear that the io.Reader provided to this method is implicitly type-asserted to inline interfaces expecting Filename() or Name() or ContentType() methods.

This hidden dependency leads to a problem when providing a simple io.Reader created directly from bytes, such as with bytes.NewReader(audioBytes). In such cases, the OpenAI API returns an "unsupported format" error because it lacks the necessary metadata (filename and content type) to correctly process the audio.

Solution: Explicit Wrapping with openai.File
To address this, it's crucial to explicitly wrap the io.Reader using openai.File(bytes.NewReader(audioBytes), filename, contentType). This ensures that the required filename and contentType metadata are correctly associated with the reader before it's passed to the API.

This approach is particularly beneficial when audio data is downloaded over the network. It eliminates the need to create a local temporary file simply to satisfy the API's implicit requirements, streamlining the workflow and reducing disk I/O.