Discord.net/Discord.py 录制用户或整个频道的音频流

Question

我目前正在尝试录制特定用户的音频，或者如果不可能的话，录制整个频道的音频。

我从 Discord.py 开始，但没有成功。目前，机器人会在特定用户连接时加入频道，并应开始录制。使用 python 和 C#，我发现旧的帖子和 github 线程为我的问题提供了解决方案，但这个解决方案似乎不再起作用。 Discord 是否删除了对获取音频流的支持？

我很想拥有他的功能，但我没有找到那么多信息。目前至少在 python 中播放音频没有问题。

编码：

private Task OnVoiceStateUpdated(SocketUser? socketUser, SocketVoiceState before, SocketVoiceState after)
{
    _ = Task.Run(async () =>
    {
        try
        {
            Logger.Output($"Starting to handle user movements", Logger.LogType.Default);
            var currentChannel = after.VoiceChannel ?? before.VoiceChannel;
            if (currentChannel == null) return;
            var botUser = currentChannel.Guild.Users.FirstOrDefault(u => u.IsBot);

            if (before.VoiceChannel == null && after.VoiceChannel != null) // If member joins a voice channel
            {
                var channel = after.VoiceChannel;

                try
                {
                    Logger.Output($"Connect bot to channel '{channel.Name}'", Logger.LogType.Default);
                    await Task.Delay(1000);
                    _audioClient = await channel.ConnectAsync();
                    _cts = new CancellationTokenSource();


                    if (socketUser is not SocketGuildUser socketGuildUser) return;
                    if (socketGuildUser.AudioStream is not InputStream inputStream) return;

                    _ = Task.Run(() =>
                        ProcessAudioAsync(inputStream)
                    );
                }
                catch (Exception e)
                {
                    Logger.Output($"Failed to connect and start recording: {e}", Logger.LogType.Error);
                }
            }
        }
        catch (Exception e)
        {
            Logger.Output($"Handling user movements failed! {e.Message}", Logger.LogType.Error);
        }
    });
    return Task.CompletedTask;
}

private async Task ProcessAudioAsync(InputStream inputStream)
{
    // Create a new wave file writer to save the audio stream
    string currentTime = DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss");
    string filename = Path.Combine(AudioRecordingsPath, $"output_{currentTime}.wav");

    // Create the wave file writer to save the audio stream
    _writer = new WaveFileWriter(filename, new WaveFormat(48000, 16, 2));

    try
    {
        var buffer = new byte[81920]; // Buffer size can be adjusted as needed

        while (!_cts.IsCancellationRequested)
        {
            var bytesRead = await inputStream.ReadAsync(buffer, 0, buffer.Length, _cts.Token);

            // If bytesRead is zero, end of the stream has been reached
            if (bytesRead == 0)
            {
                Task.Delay(1000).Wait();
                continue;
            }

            // Write from buffer to wave file
            await _writer.WriteAsync(buffer, 0, bytesRead);

            // Flush the writer to ensure data is written to disk
            await _writer.FlushAsync();
        }
    }
    catch (OperationCanceledException e)
    {
        Logger.Output($"Audio processing was cancelled. {e.Message} {e.StackTrace}", Logger.LogType.Error);
    }
    catch (TimeoutException e)
    {
        Logger.Output($"Audio processing timed out. {e.Message} {e.StackTrace}", Logger.LogType.Error);
    }
    catch (InvalidOperationException e)
    {
        Logger.Output($"Audio processing failed due to stream issue. {e.Message} {e.StackTrace}",
            Logger.LogType.Error);
    }
    catch (Exception e)
    {
        Logger.Output($"Audio processing failed. {e.Message} {e.StackTrace}", Logger.LogType.Error);
    }
    finally
    {
        await inputStream.FlushAsync();
    }
}

问题似乎出在这一行“var bytesRead = wait inputStream.ReadAsync(buffer, 0, buffer.Length, _cts.Token);”该函数被调用但永远不会返回。该流似乎从未包含任何数据。

在 C# 或 Python 中是否有可能的解决方案？

非常感谢！

Answer 1

如果您愿意切换库，pycord 具有功能性音频接收器功能（https://guide.pycord.dev/voice/receiving），但它需要一些代码重写。

但是，discord.py 扩展库已创建，允许将语音通道用作接收器。它们可以根据需要自动将音频保存为 .wav 和 .mp3 文件。请参阅 discord-ext-voice-recv 了解更多信息。