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Speech API python client library method `streaming_recognize()` doesn't return a result with `is_final` set to True

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@engelke 已经在做这个了。

开始于 2024年9月8日。

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描述

priority: p2 samples triage me type: bug

In which file did you encounter the issue?

Did you change the file? If so, how?

I have changed the line 299

 config = speech.RecognitionConfig(
        encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
        sample_rate_hertz=SAMPLE_RATE,
        language_code="en-US",
        max_alternatives=1,
    )

into

 config = speech.RecognitionConfig(
        encoding=speech.RecognitionConfig.AudioEncoding.LINEAR16,
        sample_rate_hertz=SAMPLE_RATE,
        language_code="ja-JP",
        max_alternatives=1,
    )

Describe the issue

streaming_recognize() method doesn't work properly. For even when a speaker utters a simple greeting like こんにちは in a very silent environment, this method returns StreamingRecognizeResponse object with a result of is_final == False. And always returns a result with is_final set to True exactly 90 seconds later.
this doesn't happen when the language is English or Chinese.
The same thing also happens in transcribe_streaming_infinite_v2.py

I am not sure if this report should be post here for this seems to be more internal problem.
Appreciate any help or clues anyways.

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