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Sur d’autres sites (9999)

  • ffmpeg_kit_flutter operation not permitted for audio operations

    25 août 2023, par Black Eyed Beans

    I'm trying to trim an audio file using ffmpeg_kit_flutter but I keep getting the error :

    


    audio/path/output.mp3: Operation not permitted.


    


    This is the ffmpeg command that I'm using :

    


    final cmd="-y -i \"$audioPath\" -ss $audioStartTime -to $audioEndTime -c:a libmp3lame $outPutName";


    


    And I've also tried :

    


    final cmd="-y -i \"$audioPath\" -ss $audioStartTime -to $audioEndTime -c copy $outPutName";


    


    But the error is still the same.
I'm using the ffmpeg_kit_flutter_full_gpl package.

    


  • Combining multiple image files into a video while using filter_complex to apply a watermark

    14 décembre 2017, par Geuis

    I’m trying to combine two ffmpeg operations into a single one.

    Currently I have two sets of ffmpeg commands that first generate a video from existing images, then runs that video through ffmpeg again to apply a watermark.

    I’d like to see if its possible to combine these into a single operation.

    # Create the source video
    ffmpeg -y \
    -framerate 1/1 \
    -i layer-%d.png \
    -r 30 -vcodec libx264 -preset ultrafast -crf 23 -pix_fmt yuv420p \
    output.mp4

    # Apply the watermark and render the final output
    ffmpeg -y \
    -i output.mp4 \
    -i logo.png \
    -filter_complex "[1:v][0:v]scale2ref=40:40[a][b];[b][a]overlay=(80):(main_h-200-80)" \
    final.mp4
  • How to extract audio from a video in Flutter ?

    14 janvier, par Mohammed Bekele

    I have an image picker in Flutter to get the video from the device, and then I created a function to extract the audio using ffmpeg_kit_flutter package.

    


     Future<void> _convertVideoToAudio() async {&#xA;    if (_pickedVideo != null) {&#xA;      bool? permissionGranted = await _requestStoragePermission();&#xA;      if (permissionGranted != true) {&#xA;        print("Storage permission denied.");&#xA;        return;&#xA;      }&#xA;&#xA;      String videoPath = _pickedVideo!.path;&#xA;      _outputPath = await getOutputFilePath(); // Get platform-specific path&#xA;&#xA;      try {&#xA;        // Ensure the output directory exists&#xA;        await Directory(path.dirname(_outputPath)).create(recursive: true);&#xA;&#xA;        await FFmpegKit.execute(&#xA;            "-i $videoPath -vn -c:a libmp3lame -q:a 2 $_outputPath"); // FFmpeg command&#xA;        print("Video converted to audio successfully!");&#xA;        _showSuccessDialog(); // Display success dialog&#xA;&#xA;        try {&#xA;          final String fileName = path.basename(_outputPath);&#xA;          final transcription =&#xA;              await _sendAudioForTranscription(_outputPath, fileName);&#xA;&#xA;          if (transcription != null) {&#xA;            setState(() {&#xA;              _transcription = transcription;&#xA;            });&#xA;          } else {&#xA;            setState(() {&#xA;              _transcription = "Transcription failed";&#xA;            });&#xA;          }&#xA;        } catch (e) {&#xA;          print(&#x27;Error in transcription request: $e&#x27;);&#xA;          setState(() {&#xA;            _transcription = "Network request failed";&#xA;          });&#xA;        }&#xA;      } catch (e) {&#xA;        print("Error converting video: $e");&#xA;        _showErrorDialog(); // Display error dialog&#xA;      } finally {&#xA;        setState(() {&#xA;          _pickedVideo = null; // Clear selected video&#xA;        });&#xA;      }&#xA;    } else {&#xA;      print("Please pick a video first.");&#xA;    }&#xA;  }&#xA;</void>

    &#xA;

    and for getting the path I have this function

    &#xA;

     Future<string> getOutputFilePath() async {&#xA;    final directory = await getApplicationDocumentsDirectory();&#xA;    final downloadsDirectory = Directory(&#x27;${directory.path}/downloads&#x27;);&#xA;    if (!(await downloadsDirectory.exists())) {&#xA;      await downloadsDirectory.create(recursive: true);&#xA;    }&#xA;    final String fileName = path&#xA;        .basename(_pickedVideo!.path)&#xA;        .replaceAll(&#x27;.mp4&#x27;, &#x27;.mp3&#x27;); // Replace extension&#xA;    final filePath = &#x27;${downloadsDirectory.path}/$fileName&#x27;;&#xA;    return filePath;&#xA;  }&#xA;</string>

    &#xA;

    but this is not working somehow. Because after I get the audio I'm uploading it to a server with http, then it displays that there is no path where the audio supposed to be.

    &#xA;