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• Converting audio/video tracks to AAC format in C# app

  13 février, par Alex1347

  I try convert audio/video tracks to AAC format using qaac lib. In CMD it works and output information about progress of convertation. In my C# app it works too, but I can't get information about progress, i try use these events: OutputDataReceived, ErrorDataReceived. In handler of ErrorDataReceived I don't get needed information, in handler of OutputDataReceived I get received.Data like null value. How can I get conversion progress information during conversion in C# code?

  (I use qaac lib because ffmpeg lib convert tracks to AAC incorrect - incorrect duration of result track, resolving not find for this problem, some analog apps have the same bug.)

  Creating process for converting:

  string arguments = $"\"{engineParameters.InputFile.Filename}\" -no-delay -o \"{engineParameters.OutputFile.Filename}\"";
  
  processStartInfo = new ProcessStartInfo
  {
      FileName = QaacFilePath,
      Arguments = arguments,
      RedirectStandardOutput = true,
      UseShellExecute = false,
      CreateNoWindow = true,
      WindowStyle = ProcessWindowStyle.Hidden
  };
  

  Also I call these methods for process:

  BeginOutputReadLine();
  BeginErrorReadLine();
  WaitForExit();
  

  Handlers:

  this.Process.OutputDataReceived += (sender, received) =>
  {
      if (received.Data == null) return;
      //Some code...
  }
  

  this.Process.ErrorDataReceived += (sender, received) =>
  {
      if (received.Data == null) return;
      //Some code...
  }
  

• How to disable slf4j log in java

  12 février, par Model123123

  Sorry for my poor English.

  I'm using ffmpeg-cli-wrapper library in java

  [main] INFO net.bramp.ffmpeg.RunProcessFunction - .\ffprobe.exe -version

  [main] INFO net.bramp.ffmpeg.RunProcessFunction - .\ffprobe.exe -v quiet -print_format json -show_error -show_format -show_streams -show_chapters

  How to remove this log?

  try this:

  1. java.util.logging.Logger.getLogger("net.bramp.ffmpeg").setLevel(Level.OFF);

  2. /logger name="net.bramp.ffmpeg" level="OFF"/ in logback.xml

  but not work...

  RunProcessFunction src: https://github.com/bramp/ffmpeg-cli-wrapper/blob/master/src/main/java/net/bramp/ffmpeg/RunProcessFunction.java

• Use FFmpeg in Visual Studio

  12 février, par box

  I'm trying to use FFmpeg in a C++ project in Visual Studio 2010. I want to include the libraries as statically linked files. Simple programs like libavcodec/api-example.c compile without error and no linker error appears in the error view when starting them. However, a message box shows up after starting the application, saying that avutil-51.dll is missing. Do you have any hints on how to fix that?

  I used the latest dev build from http://ffmpeg.zeranoe.com/builds/. Then I specified include as additional include directory, avcodec.lib;avfilter.lib;avformat.lib;avutil.lib as additional dependencies and lib as additional library directory.

• FFmpegKitFlutter, Error : MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)

  12 février, par 7Solomon

  I Have this simple Flutter function, to compress Audio Files

  import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';
  import 'package:ffmpeg_kit_flutter/return_code.dart';
  
  
  Future compressAudio(String inputPath) async {
      try {
        //     ...
        final command = '-y -i "$inputPath" ' // Input file
            '-af "loudnorm=I=-16:TP=-1.5:LRA=11,' // Loudness normalization
            'acompressor=threshold=${_config['threshold_db']}:'
            'ratio=${_config['ratio']}:'
            'attack=${_config['attack']}:'
            'release=${_config['release']},'
            'highpass=f=20,lowpass=f=20000" ' // Audio filters
            '-ar 44100 ' // Sample rate
            '-b:a 128k ' // Bitrate
            '-codec:a libmp3lame ' // MP3 encoder
            '-q:a 2 ' // Quality setting for LAME (0-9, lower is better)
            '-map_metadata 0 ' // Copy metadata
            '"$outputPath"'; // Output file
  
        // Execute FFmpeg command
        final session = await FFmpegKit.execute(command);
        final returnCode = await session.getReturnCode();
        final logs = await session.getLogs();
        print('FFmpeg logs: $logs');
  
        if (ReturnCode.isSuccess(returnCode)) {
          return outputFileName;
        } else {
          final logs = await session.getLogs();
          throw Exception(
              'FFmpeg process failed with code $returnCode\nLogs: $logs');
        }
      } catch (e, stackTrace) {
        print('Error: $e');
        print('Stack trace: $stackTrace');
        throw Exception('Failed to compress audio: $e\nStack trace: $stackTrace');
      }
    }
  

  And I get this error Error: MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)

  This is the Stacktrace

  flutter: Error: MissingPluginException(No implementation found for method ffmpegSession on channel flutter.arthenica.com/ffmpeg_kit)
  flutter: Stack trace: #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)
  
  #1      AbstractSession.createFFmpegSession (package:ffmpeg_kit_flutter/abstract_session.dart:71:11)
  
  #2      FFmpegSession.create (package:ffmpeg_kit_flutter/ffmpeg_session.dart:40:21)
  
  #3      FFmpegKit.executeWithArguments (package:ffmpeg_kit_flutter/ffmpeg_kit.dart:44:9)
  
  #4      FileProcessor.compressAudio (package:predigt_upload_fl/file.dart:182:23)
  
  #5      _DetailPageState._handleSubmit (package:predigt_upload_fl/GUIs/LiveStreamDetailPage.dart:334:30)
  
  
  
  ══╡ EXCEPTION CAUGHT BY SERVICES LIBRARY ╞══════════════════════════════════════════════════════════
  flutter.arthenica.com/ffmpeg_kit_event)
  
  When the exception was thrown, this was the stack:
  #0      MethodChannel._invokeMethod (package:flutter/src/services/platform_channel.dart:332:7)
  
  #1      EventChannel.receiveBroadcastStream. (package:flutter/src/services/platform_channel.dart:676:9)        
  
  

  And i think this comes from abstract class FFmpegKitPlatform extends PlatformInterface inside ffmpeg_kit_flutter_platform_interface.dart, because in there are a lot of functions that are not Implemented.

  This happens not just because of one functions:

      // ...
      final logLevel = await _getLogLevel();
      print('logLevel: $logLevel');
      if (logLevel != null) {
        FFmpegKitConfig.setLogLevel(logLevel);
      }
      final version = FFmpegKitFactory.getVersion();
      final platform = await FFmpegKitConfig.getPlatform();
      final arch = await ArchDetect.getArch();
      final packageName = await Packages.getPackageName();
      await FFmpegKitConfig.enableRedirection();
      final isLTSPostfix = (await FFmpegKitConfig.isLTSBuild()) ? "-lts" : "";
      // ...
  
  

  All of these Functions and more in FFmpegKitInitializer are not Implemented. So im pretty sure im missing something else here than just some outdated Version.

  These are my Dependencies:

  dependencies:
    flutter:
      sdk: flutter
    path_provider: ^2.0.15
    just_audio: ^0.9.34
    file_picker: ^5.3.1
    path: ^1.8.3
    id3_codec: ^1.0.3
    ftpconnect: ^2.0.5
    http: ^1.1.0
    shared_preferences: ^2.2.0
    html: ^0.15.5
    youtube_explode_dart: ^2.3.9
    intl: ^0.19.0
    ffmpeg_kit_flutter: ^6.0.3
  

  Im pretty new to Flutter Development so Im not quiete sure how to go about this Problem because every other FFmpeg Wrapper also has some problems that i couldnt fix.

  If you need any other Information feel free to ask me, because I also dont know what someone would need to go fix the problem.

• ffmpeg sequence starting at frame 1001

  11 février, par Kernowkid

  I have an image sequence starting at 1001 that I'd like to convert to a mp4 using ffmpeg. Here's what I'm putting in cmd shell:

  ffmpeg -i plates_sh01_%04d.jpeg start_number 1001 -s 1920x1080 -vcodec libx264 -crf 25 -b:v 4M -pix_fmt yuv420p plates_sh01_%04d.mp4
  

  This works for image sequences starting at frame numbers below 999. For any sequence starting at 1000 or above I get this error:

  Could find no file with path 'plates_sh01_%04d.jpeg' and index in the range 0-4 plates_sh01_%04d.jpeg_%04d.jpeg: No such file or directory

  I can't find any solutions to this apart from re-number the image sequence.

  Any help is greatly appreciated.