如何播放opus解码帧，或者如何将1字节的pcm16拆分成2字节的pcm(bitDepthInBytes)？

import pyaudio
import opuslib

# 创建音频流
p = pyaudio.PyAudio()
stream = p.open(format=pyaudio.paInt16, channels=1, rate=48000, output=True)

# 创建opus解码器
decoder = opuslib.Decoder(48000, 1)

# 读取opus文件并解码播放
with open('input.opus', 'rb') as file:
    while True:
        # 读取opus解码帧
        opus_frame = file.read(960)

        # 解码opus帧为PCM数据
        pcm_frame = decoder.decode(opus_frame, 960, decode_fec=True)

        # 播放PCM数据
        stream.write(pcm_frame)

# 关闭音频流和解码器
stream.stop_stream()
stream.close()
p.terminate()
decoder.destroy()

import struct

# 1字节的pcm16数据
pcm_1byte = b'\x00'

# 将1字节的pcm16拆分成2字节的pcm
pcm_2bytes = struct.unpack('<h', pcm_1byte + b'\x00')

print(pcm_2bytes)