How to check the current record status of a sink

[Zoom-Developer]

I need to make sure that the recording stops when there is silence in the channel after recording, so as not to miss a single word. But when trying to get audio data from sink.audio_data.file , the read function always returns b'' even though audio is coming. Help please.
My implementation:

async def listener(vc):
    while True:
        sink = discord.sinks.WaveSink()
        vc.start_recording(
            sink,
            callback,
            vc
        )
        timer = 0
        last_len = 0
        while True:
            total = 0
            for user, data in sink.audio_data.items():
                total += len(data.file.read()) # always 0
            if last_len != 0 and total < 1:
                if last_len == total:
                    print("Nothing new")
                    timer += 1
                else:
                    print("New audio")
                    timer = 0
                    last_len = total
                if timer >= 3:
                    print("Break")
                    break
            await asyncio.sleep(1)
        try: vc.stop_recording()
        except: pass

[nie3e]

@Zoom-Developer
instead of

len(data.file.read())

use

data.file.getbuffer().nbytes

[Zoom-Developer]

Thank you for answer after 2 years)