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Autres articles (36)

  • Les autorisations surchargées par les plugins

    27 avril 2010, par

    Mediaspip core
    autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs

  • HTML5 audio and video support

    13 avril 2011, par

    MediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
    The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
    For older browsers the Flowplayer flash fallback is used.
    MediaSPIP allows for media playback on major mobile platforms with the above (...)

  • De l’upload à la vidéo finale [version standalone]

    31 janvier 2010, par

    Le chemin d’un document audio ou vidéo dans SPIPMotion est divisé en trois étapes distinctes.
    Upload et récupération d’informations de la vidéo source
    Dans un premier temps, il est nécessaire de créer un article SPIP et de lui joindre le document vidéo "source".
    Au moment où ce document est joint à l’article, deux actions supplémentaires au comportement normal sont exécutées : La récupération des informations techniques des flux audio et video du fichier ; La génération d’une vignette : extraction d’une (...)

Sur d’autres sites (4044)

  • In Flutter, how to get image pixel

    12 janvier 2024, par Pianone

    my code here

    


    var response = await Dio().get(
   url,
   options: Options(responseType: ResponseType.bytes)
);
Uint8List? srcImage = Uint8List.fromList(response.data);
Uint8List? watermark = await captureWaterMark();
Image i = Image.memory(srcImage!);
//how can I get the pixel (Image i) such like 1920*1080 or just width/hight pixel
...tell me how to do...
srcImage = await addWaterMarkByFfmpegCommand(srcImage, watermark);
   final result = await ImageGallerySaver.saveImage(
      srcImage!, name: name,
   );


    


    i need get the pic pixel so that i can use it in ffmpeg command, it a func that add a watermark into srcImage, but cause their pixel ratio too diff to adapted watermark

    


    i try to get pixel from ffmpeg... but i failed

    


    /// addWaterMark by using ffmpeg Command
Future addWaterMarkByFfmpegCommand(Uint8List srcImg, Uint8List watermark) async {
  try {
    final Directory tempDir = await Directory.systemTemp.createTemp();
    final File image1File = File('${tempDir.path}/srcImg.jpg');
    await image1File.writeAsBytes(srcImg);
    final File image2File = File('${tempDir.path}/watermark.png');
    await image2File.writeAsBytes(watermark);

    final String outputFilePath = '${tempDir.path}/output.jpg';
    //when i get srcImage pixel, the positions in bold(iw*1) in the following commands will be replaced to make watermark adapted
    final String command =
        '-i ${image1File.path} -i ${image2File.path} -filter_complex "[1:v]scale=**iw*1**:-1[v1];[0:v][v1]overlay=10:10" -frames:v 1 $outputFilePath';
    await FFmpegKit.execute(command);

    final File outputFile = File(outputFilePath);
    final Uint8List outputBytes = await outputFile.readAsBytes();
    return outputBytes;
  } catch (e) {
    print('Error executing ffmpeg command: $e');
  }
  return null;
}


    


    ps : i am new to flutter and ffmpeg, plz help me, I'd appreciate, thanks alot

    


  • Is there a way to horizontal flip video captured from flutter front camera

    5 mai 2024, par JoyJoy

    Basically, I'm trying to flip video horizontally after capturing it from flutter front camera. So I start recording, stop recording, flip the video and pass it to another page. I'm fairly new and would appreciate any assistance as my code isn't working

    


    I've tried doing so using the new ffmpeg_kit flutter

    


    Future<void> flipVideo(String inputPath, String outputPath) async{&#xA;final ffmpegCommand = "-i $inputPath -vf hflip $outputPath";&#xA;final session = FFmpegKit.executeAsync(ffmpegCommand);&#xA;await session.then((session) async {&#xA;  final returnCode = await session.getReturnCode();&#xA;  if (ReturnCode.isSuccess(returnCode)) {&#xA;    print(&#x27;Video flipping successful&#x27;);&#xA;  } else {&#xA;    print(&#x27;Video flipping failed: ${session.getAllLogs()}&#x27;);&#xA;  }&#xA;});}&#xA;&#xA;void stopVideoRecording() async {&#xA;XFile videopath = await cameraController.stopVideoRecording();&#xA;&#xA;try {&#xA;  final Directory appDocDir = await &#xA;  getApplicationDocumentsDirectory();&#xA;  final String outputDirectory = appDocDir.path;&#xA;  final String timeStamp = DateTime.now().millisecondsSinceEpoch.toString();&#xA;  final String outputPath = &#x27;$outputDirectory/flipped_video_$timeStamp.mp4&#x27;;&#xA;&#xA;  await flipVideo(videopath.path, outputPath);&#xA;&#xA;  // Once completed,&#xA;   Navigator.push(&#xA;    context,&#xA;    MaterialPageRoute(&#xA;      builder: (builder) => VideoViewPage(&#xA;        path: File(outputPath),&#xA;        fromFrontCamera: iscamerafront,&#xA;        flash: flash,&#xA;      )));&#xA;  print(&#x27;Video flipping completed&#x27;);&#xA;} catch (e) {&#xA;  print(&#x27;Error flipping video: $e&#x27;);&#xA;}&#xA;</void>

    &#xA;

    }

    &#xA;

  • ffmpeg cut video and burn subtitle in a single command

    3 janvier 2020, par razvan

    I want to cut a piece out of a video and burn subtitle in that piece.

    I can do this in 3 steps :

    1. cut the video
      ffmpeg -ss 25:00 -to 26:00 -i vid.mp4 -c copy out.mp4

    2. cut the subtitle
      ffmpeg -i sub.srt -ss 25:00 -to 26:00 out.srt

    3. burn subtitle in the video piece
      ffmpeg -i out.mp4  -vf subtitles=out.srt  -c:a copy -y final.mp4

    But I want to do this in a single ffmpeg command.

    If I do this
    ffmpeg -ss 25:00 -to 26:00 -i vid.mp4   -vf subtitles=sub.srt  -c:a copy -y final.mp4
    the video is cut but no subtitle is burned into it.
    This is fast.

    If I do this
    ffmpeg  -i vid.mp4  -ss 25:00 -to 26:00 -vf subtitles=sub.srt  -c:a copy -y final.mp4
    the video is cut and subtitles burned correctly,but there is a delay in starting writing the final.mp4.
    I think ffmpeg is processing vid.mp4 from the beginning till it reach the -ss time (and drop that part)
    then continue processing and writing it to final.mp4

    Is there a way to do this fast and in a single ffmpeg command ?
    Like ffmpeg going directly to -ss time and cut that, process it, burn subtitle in it.

    Thanks