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• Combining audio and multiple videos with FFMPEG [closed]

  6 novembre 2023, par Lee P

  I am working on a ffmpeg script to combine two videos with one audio file. The first video file should start after about 6 seconds and the second after about 40 seconds, and there should be a padding with a black screen between the two videos.
However, it only seems to add the first video clones the final frame as the padding.

  


  Here is my current script :

  


  ffmpeg -i video_0.mp4 -i video_1.mp4 -i audio.mp4 -filter_complex "[0:v] tpad=start_duration=5927ms:start_mode=add:color=black:stop_mode=add:color=black; [1:v] tpad=start_duration=44901ms:start_mode=add:color=black:stop_mode=add:color=blackconcat=n=2" -map 2:a -f mp4 -movflags +faststart composite_recording.mp4


  


  The final video timing should be :

  


  00:00-00:06 — black screen
  
00:06-00:24 — first video
  
00:24-00:40 — black screen
  
00:40-00:48 — second video

  


  I tried setting different values for the tpad start_duration for the second video and expected it to start the second video at around 40 seconds into the audio, however it didn't change anything.

  


• Unrecognized option 'crf'

  6 septembre 2022, par Arjit Kaushal

  I am trying compress video using ffmpeg but i am facing errors in the command.
Although it runs perfectly fine on my linux terminal.( ffmpeg -i input.avi -vcodec libx264 -crf 24 output.avi).

  


  my code :

  


  void _compress() {
        if (_videoModel == null) return;
        String inputPath = _videoModel!.originalCachePath;
        String outputPath = _videoModel!.editCachePath;
    
        FFmpegKit.execute("-i $inputPath -vcodec libx264 -crf 24 -y $outputPath")
            .then((session) async {
          final returnCode = await session.getReturnCode();
          if (ReturnCode.isSuccess(returnCode)) {
            Navigator.pushNamed(context, PreviewPage.routeName,
                arguments: _videoModel);
          } else if (ReturnCode.isCancel(returnCode)) {
            print("compress cancel");
          } else {
            print("compress error : $returnCode");
            FFmpegKitConfig.enableLogCallback((log){
              final message = log.getMessage();
              print(message);
            });
    
    
          }
        });
      }


  


  I am facing the following errors :
Unrecognized option 'crf',
I/flutter (31056) : Error splitting the argument list,
Option not found.

  


• How to create video from multiple gallery images store in array flutter ffmpeg

  26 janvier 2023, par Ammara

  I select images from gallery using multi_image_picker in flutter and store all images in array.

  


    try {
   resultList = await 
   MultiImagePicker.pickImages(
    maxImages: 300,
    enableCamera: true,
    selectedAssets: images,
    materialOptions: MaterialOptions(
      actionBarTitle: "Photo Editor and Video 
   Maker App",
    ),
  );
 }


  


  User can select images from gallery and store in resultlist array.
Now I want to pass this array to ffmpeg to create video from all these images.

  


  I try a lot and search almost all sites but fail. Here is my code.

  


  Future<void> ConvertImageToVideo () async{&#xA;const String BASE_PATH = &#x27;/storage/emulated/0/Download/&#x27;;&#xA;const String AUDIO_PATH = BASE_PATH &#x2B; &#x27;audiio.mp3&#x27;;&#xA;const String IMAGE_PATH = BASE_PATH &#x2B; &#x27;image002.png&#x27;;&#xA;const String OUTPUT_PATH = BASE_PATH &#x2B; &#x27;output02.mp4&#x27;;&#xA;// final FlutterFFmpeg _flutterFFmpeg = FlutterFFmpeg();&#xA;if(await Permission.storage.request().isGranted){&#xA;  List<asset> resultlist  = <asset>[];&#xA;  String commandToExecute =&#xA;      &#x27;-r 15 -f mp3 -i ${AUDIO_PATH} -f image2 -i ${resultlist} -y ${OUTPUT_PATH}&#x27;;&#xA;  await FFmpegKit.execute(commandToExecute).then((session) async {&#xA;    final returnCode = await session.getReturnCode();&#xA;    final state = await session.getState();&#xA;    if (ReturnCode.isSuccess(returnCode)) {&#xA;      print("ruuning   "&#x2B;state.toString());&#xA;      print("video created " &#x2B; returnCode.toString());&#xA;    } else if (ReturnCode.isCancel(returnCode)) {&#xA;      print("video cancel "  &#x2B; returnCode.toString());&#xA;    } else {&#xA;      print("error " );&#xA;    }&#xA;  });&#xA;}else if (await Permission.storage.isPermanentlyDenied) {&#xA;  openAppSettings();&#xA;}&#xA;</asset></asset></void>

  


  }