rokojori_action_library/Tools/FFmpeg/FFmpeg.cs

#if TOOLS
using Godot;
using Rokojori;
using System.Diagnostics;
using System.Collections.Generic;
using System.Threading.Tasks;
using System;

namespace Rokojori.Tools;


public class FFmpegResponse
{
  public int exitCode;
  public string rawResponse;
}

public class FFmpeg 
{
  public static async Task<FFmpegResponse> Run( List<string> arguments, string workingDirectory = null, string ffmpegPath = "ffmpeg" )
  {
    var response = new FFmpegResponse();

    var joinedArgs = arguments.Join( " ");

    RJLog.Log( "FFmpeg at", ffmpegPath, ">>",  joinedArgs );

    var process = new Process
    {
      StartInfo = new ProcessStartInfo
      {
        FileName = ffmpegPath,
        Arguments = joinedArgs,
        RedirectStandardOutput = true,
        RedirectStandardError = true,
        UseShellExecute = false,
        CreateNoWindow = true
      }
      
    };
    
    if ( workingDirectory != null )
    {
      process.StartInfo.WorkingDirectory = workingDirectory;
    }
    
    process.Start();

    var outputResult = new List<string>();
    var errorResult = new List<string>();

    process.OutputDataReceived += (sender, e) =>
    {
      if ( e.Data == null )
      {
        return;
      }
      
      RJLog.Log( e.Data );
      outputResult.Add( e.Data );
    };

    process.ErrorDataReceived += (sender, e) =>
    {
      if ( e.Data == null )
      {
        return;
      }

      RJLog.Error( e.Data );
      errorResult.Add( e.Data );
    };

    process.BeginOutputReadLine();
    process.BeginErrorReadLine();


    await process.WaitForExitAsync();

    
    response.exitCode = process.ExitCode;

    if ( process.ExitCode == 0 )
    {
      response.rawResponse = outputResult.Join( "" );
    }
    else
    {
      response.rawResponse = errorResult.Join( "" );
    }

    return response;
  }

  public static Task<FFmpegResponse> Convert_MP4_to_OGV( 
    string path, string ffmpegPath = "ffmpeg", 
    FFmpegQuality videoQuality = FFmpegQuality._8_Good, 
    FFmpegQuality audioQuality = FFmpegQuality._8_Good,
    int keyFrames = 64,
    int w = -1, int h = -1 
    )
  {
    // ffmpeg -i input.mp4 -vf "scale=-1:720" -q:v 6 -q:a 6 -g:v 64 output.ogv

    var args = new List<string>();

    args.Add( "-i " + path );

    if ( ! ( w == -1 && h == -1 ) )
    {
      args.Add( "-vf " + "\"scale=" + w + ":" + h + "\"" );
    }

    args.Add( "-q:v " + FFmpegQualityTool.ToInt( videoQuality ) );
    args.Add( "-q:a " + FFmpegQualityTool.ToInt( audioQuality ) );
    args.Add( "-g:v " + keyFrames );

    var filePath = FilePath.Absolute( path );
    var outputPath = filePath.WithExtension( ".ogv" );
    args.Add( outputPath.absolutePath );


    return Run( args, null, ffmpegPath );
  }
}



#endif