Flutter

1. Add ffmpeg_kit_flutter as a dependency into your pubspec.yaml file.

   dependencies:
     ffmpeg_kit_flutter: ^4.5.0

   • Installing ffmpeg_kit_flutter enables the https package by default. It is possible to install the other packages using the following dependency format instead.

     dependencies:
       ffmpeg_kit_flutter_<package name>: ^4.5.0

2. Execute FFmpeg commands.

   import 'package:ffmpeg_kit_flutter/ffmpeg_kit.dart';
   
   FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (session) async {
     final returnCode = await session.getReturnCode();
   
     if (ReturnCode.isSuccess(returnCode)) {
   
       // SUCCESS
   
     } else if (ReturnCode.isCancel(returnCode)) {
   
       // CANCEL
   
     } else {
   
       // ERROR
   
     }
   });

3. Each execute call creates a new session. Access every detail about your execution from the session created.

   FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (session) async {
   
     // Unique session id created for this execution
     final sessionId = session.getSessionId();
   
     // Command arguments as a single string
     final command = session.getCommand();
   
     // Command arguments
     final commandArguments = session.getArguments();
   
     // State of the execution. Shows whether it is still running or completed
     final state = await session.getState();
   
     // Return code for completed sessions. Will be undefined if session is still running or FFmpegKit fails to run it
     final returnCode = await session.getReturnCode();
   
     final startTime = session.getStartTime();
     final endTime = await session.getEndTime();
     final duration = await session.getDuration();
   
     // Console output generated for this execution
     final output = await session.getOutput();
   
     // The stack trace if FFmpegKit fails to run a command
     final failStackTrace = await session.getFailStackTrace();
   
     // The list of logs generated for this execution
     final logs = await session.getLogs();
   
     // The list of statistics generated for this execution (only available on FFmpegSession)
     final statistics = await (session as FFmpegSession).getStatistics();
   
   });

4. Execute FFmpeg commands by providing session specific execute/log/session callbacks.

   FFmpegKit.executeAsync('-i file1.mp4 -c:v mpeg4 file2.mp4', (Session session) async {
   
     // CALLED WHEN SESSION IS EXECUTED
   
   }, (Log log) {
   
     // CALLED WHEN SESSION PRINTS LOGS
   
   }, (Statistics statistics) {
   
     // CALLED WHEN SESSION GENERATES STATISTICS
   
   });

5. Execute FFprobe commands.

   FFprobeKit.executeAsync(ffprobeCommand, (session) {
   
     // CALLED WHEN SESSION IS EXECUTED
   
   });

6. Get media information for a file/url.

   FFprobeKit.getMediaInformationAsync('<file path or url>', (session) async {
     final information = await (session as MediaInformationSession).getMediaInformation();
   });

7. Stop ongoing FFmpeg operations.

• Stop all sessions

  FFmpegKit.cancel();

• Stop a specific session

  FFmpegKit.cancel(sessionId);

8. (Android) Convert Storage Access Framework (SAF) Uris into paths that can be read or written by FFmpegKit and FFprobeKit.

• Reading a file:

  FFmpegKitConfig.selectDocumentForRead('*/*').then((uri) {
    FFmpegKitConfig.getSafParameterForRead(uri!).then((safUrl) {
      FFmpegKit.executeAsync("-i ${safUrl!} -c:v mpeg4 file2.mp4");
    });
  });

• Writing to a file:

  FFmpegKitConfig.selectDocumentForWrite('video.mp4', 'video/*').then((uri) {
    FFmpegKitConfig.getSafParameterForWrite(uri!).then((safUrl) {
      FFmpegKit.executeAsync("-i file1.mp4 -c:v mpeg4 ${safUrl}");
    });
  });

9. Get previous FFmpeg and FFprobe sessions from the session history.

   FFmpegKit.listSessions().then((sessionList) {
     sessionList.forEach((session) {
       final sessionId = session.getSessionId();
     });
   });
   
   FFprobeKit.listSessions().then((sessionList) {
     sessionList.forEach((session) {
       final sessionId = session.getSessionId();
     });
   });

10. Enable global callbacks.

• Execute Callback, called when an async execution is ended

  FFmpegKitConfig.enableExecuteCallback((session) {
    final sessionId = session.getSessionId();
  });

• Log Callback, called when a session generates logs

  FFmpegKitConfig.enableLogCallback((log) {
    final message = log.getMessage();
  });

• Statistics Callback, called when a session generates statistics

  FFmpegKitConfig.enableStatisticsCallback((statistics) {
    final size = statistics.getSize();
  });

11. Register system fonts and custom font directories.

    FFmpegKitConfig.setFontDirectoryList(["/system/fonts", "/System/Library/Fonts", "<folder with fonts>"]);