How can I record an audio from USB audio device using C++ with ffmpeg on Linux? I have the following code. But I have no idea how to set the parameter of 'url' in the function of avformat_open_input. Could assistance be provided by anybody? Much appreciated.How can I record an audio from USB audio device
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如何在Linux上使用C ++和ffmpeg在USB音频设备上录制音频？
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