使用FLASK构建的Webapp可以创建音频（键入mp3），但可以'；以后不要播放那个文件

我用FLASK创建了一个webapp。它使用文本到语音的GoogleAPI生成一个名为“output.mp3”的音频输出。我已将output.mp3放在static文件夹中，然后尝试使用audio.html以下命令播放它：

<audio id="myAudio">
    <source src="static/output.mp3" type="audio/mpeg">
</audio>

<p>Click the buttons to play or pause the audio.</p>

<button onclick="playAudio()" type="button">Play Audio</button>
<button onclick="pauseAudio()" type="button">Pause Audio</button>

<script>
var x = document.getElementById("myAudio");

function playAudio() {
  x.play();
}

function pauseAudio() {
  x.pause();
}
</script>

如果我不使用“output.mp3”，而是随机播放静态文件夹中的mp3，它就可以正常工作。但它不能播放output.mp3

@app.route('/audio')
def audio():
    
  
    VideoCamera().__del__()
    VideoCamera().closefile()
    """Synthesizes speech from the input string of text or ssml.

    Note: ssml must be well-formed according to:
    https://www.w3.org/TR/speech-synthesis/
    """

# Instantiates a client
    client = texttospeech.TextToSpeechClient()
    # with open('flaskblog/output.txt', 'r') as file:
    #         data = file.read().replace('\n', '')



# Set the text input to be synthesized
    global data
    synthesis_input = texttospeech.SynthesisInput(text=data)

# Build the voice request, select the language code ("en-US") and the ssml
# voice gender ("neutral")
    voice = texttospeech.VoiceSelectionParams(
        language_code="en-US", ssml_gender=texttospeech.SsmlVoiceGender.NEUTRAL
    )

# Select the type of audio file you want returned
    audio_config = texttospeech.AudioConfig(
        audio_encoding=texttospeech.AudioEncoding.MP3
    )

# Perform the text-to-speech request on the text input with the selected
# voice parameters and audio file type
    response = client.synthesize_speech(
        input=synthesis_input, voice=voice, audio_config=audio_config
    )

# The response's audio_content is binary.
    with open("flaskblog/static/output.mp3", "wb") as out:
    # Write the response to the output file.
        out.write(response.audio_content)
        print('Audio content written to file "output.mp3"')
    
    return render_template('audio.html')