Question

首先 - 我的英语不是很好，对不起。

我使用c＃中的ffmpeg将图像转换为视频。要与ffmpeg交互，我使用管道。

router.get('/', checkAuthentication, function(req, res){
  res.render('index');
});

动作“sendDataUsingPipe”看起来像

public async Task<byte[]> ExecuteCommand(
        string arguments,
        Action<NamedPipeServerStream> sendDataUsingPipe)
    {
        var inStream = new NamedPipeServerStream(
            "from_ffmpeg",
            PipeDirection.In,
            1,
            PipeTransmissionMode.Byte,
            PipeOptions.Asynchronous,
            PipeBufferSize,
            PipeBufferSize);

        var outStream = new NamedPipeServerStream(
            "to_ffmpeg",
            PipeDirection.Out,
            1,
            PipeTransmissionMode.Byte,
            PipeOptions.Asynchronous,
            PipeBufferSize,
            PipeBufferSize);

        var waitInConnectionTask = inStream.WaitForConnectionAsync();
        var waitOutConnectionTask = outStream.WaitForConnectionAsync();

        byte[] byteData;

        using (inStream)
        using (outStream)
        using (var inStreamReader = new StreamReader(inStream))
        using (var process = new Process())
        {
            process.StartInfo = new ProcessStartInfo
            {
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                RedirectStandardInput = true,
                FileName = PathToFfmpeg,
                Arguments = arguments,
                UseShellExecute = false,
                CreateNoWindow = true
            };

            process.Start();

            await waitOutConnectionTask;

            sendDataUsingPipe.Invoke(outStream);

            outStream.Disconnect();
            outStream.Close();

            await waitInConnectionTask;

            var logTask = Task.Run(() => process.StandardError.ReadToEnd());
            var dataBuf = ReadAll(inStream);

            var shouldBeEmpty = inStreamReader.ReadToEnd();
            if (!string.IsNullOrEmpty(shouldBeEmpty))
                throw new Exception();

            var processExitTask = Task.Run(() => process.WaitForExit());
            await Task.WhenAny(logTask, processExitTask);
            var log = logTask.Result;

            byteData = dataBuf;

            process.Close();
            inStream.Disconnect();
            inStream.Close();
        }

        return byteData;
    }

当我发送10/20/30图像（无论大小）时，ffmpeg会处理所有内容。当我需要传输600/700 / ..图像时，然后在ffmpeg日志中我看到它只收到189-192，而在视频中也只有189-192个图像。代码中的日志或异常没有错误。

这种行为可能是什么原因？

Ffmpeg只从管道接收一条信息

0 个答案: