How to Filter console output

[FedeC87p]

0

`
I try to filter the output in console with the Medallion.Shell

var command = Command.Run( ffMpegBinaryPath, args); command.RedirectTo(Console.OpenStandardOutput()); command.RedirectFrom(Console.OpenStandardInput()); command.RedirectStandardErrorTo(Console.OpenStandardError());
In this way i can't filter the output...

before I used the ProcessInfo directly, is there a way to get the same result with that library Medallion?

`
using var FFmpegProcess = Process.Start(procStartInfo) ?? throw new InvalidOperationException("null process");

            FFmpegProcess.ErrorDataReceived += delegate (object sender, DataReceivedEventArgs received)
            {
                if (received?.Data is not null &&
                    received.Data.StartsWith("frame=", StringComparison.InvariantCulture))
                {
                    Console.WriteLine(received.Data);
                    Console.SetCursorPosition(0, Console.CursorTop - 1);
                }
            };

`

[madelson]

It looks like you want to print a subset of lines from the merged stdout/stderr streams. If not, please clarify what behavior you want. If that's the case, then you can do this:

Command command = ...
// wrap this foreach in a Task.Run() if you want to run this logic asynchronously
foreach (var line in command.GetOutputAndErrorLines())
{
    // do any filtering/printing here
}

[FedeC87p]

Work, thanks for the help.

 private static CancellationTokenSource PrintConsoleStatus(Command command)

    {
        var tokenSource = new CancellationTokenSource();
        CancellationToken ct = tokenSource.Token;
        var task = Task.Run(() =>
        {
            if (ct.IsCancellationRequested)
                return;

            foreach (var line in command.GetOutputAndErrorLines())
            {
                if (ct.IsCancellationRequested)
                    return;

                if (line is not null &&
                    line.StartsWith("frame=", StringComparison.InvariantCulture))
                {
                    Console.WriteLine(line);
                    Console.SetCursorPosition(0, Console.CursorTop - 1);
                }
            }
        }, tokenSource.Token);
        return tokenSource;
    }

[madelson]

Sounds good @FedeC87p . I've updated the README to demonstrate this approach.