python 获取音频信息

 

import sounddevice as sd

def get_default_speaker_info():
    """使用 sounddevice 获取默认音频设备的详细信息"""
    try:
        # 获取默认音频设备信息
        devices = sd.query_devices()
        default_device_idx = sd.default.device[1]  # 默认输出设备索引
        default_device = devices[default_device_idx]
        
        # 获取设备名称
        device_name = default_device['name']
        
        # 获取通道数
        channels = default_device['max_output_channels']
        
        # 获取支持的采样率
        # sounddevice 可以通过 extra_settings 获取更多设备信息
        supported_samplerates = []
        
        # 常见的采样率列表
        common_rates = [8000, 11025, 16000, 22050, 32000, 44100, 48000, 88200, 96000, 176400, 192000, 352800, 384000]
        
        # 检查设备支持的采样率
        for rate in common_rates:
            try:
                sd.check_output_settings(device=default_device_idx, samplerate=rate, channels=min(channels, 2))
                supported_samplerates.append(rate)
            except Exception:
                # 不支持的采样率
                pass
                
        # 使用第一个支持的采样率作为默认值
        default_samplerate = supported_samplerates[0] if supported_samplerates else 44100
        
        return {
            'device_name': device_name,
            'channels': channels,
            'default_samplerate': default_samplerate,
            'supported_samplerates': supported_samplerates
        }
        
    except Exception as e:
        return {'error': str(e)}

def list_all_devices():
    """列出所有音频设备的信息"""
    try:
        devices = sd.query_devices()
        print("=== 所有音频设备信息 ===")
        print(devices)
        return devices
    except Exception as e:
        print(f"获取设备信息时出错: {e}")
        return None

def main():
    """主函数，打印默认扬声器信息"""
    print("正在获取默认音频设备信息...")
    
    # 首先列出所有设备
    list_all_devices()
    
    # 获取默认设备信息
    speaker_info = get_default_speaker_info()
    
    if 'error' in speaker_info:
        print(f"获取音频设备信息时出错: {speaker_info['error']}")
        return
    
    print("\n=== 默认音频设备信息 ===")
    print(f"设备名称: {speaker_info['device_name']}")
    print(f"最大输出通道数: {speaker_info['channels']}")
    print(f"推荐采样率: {speaker_info['default_samplerate']} Hz")
    
    if speaker_info['supported_samplerates']:
        print(f"支持的采样率: {', '.join([str(rate) + ' Hz' for rate in speaker_info['supported_samplerates']])}")
    else:
        print("未能检测到支持的采样率")

if __name__ == "__main__":
    main()