Recherche avancée

Sur d’autres sites (10416)

• Show video length in HLS player before all TS files are created

  14 novembre 2022, par WilliamTaco

  I have a spring-boot backend which on request (on demand) uses ffmpeg to create a m3u8 playlist with its ts files from a mp4 file. So basically my react frontend requests the index.m3u8 from the backend and if it doesnt already exist it creates it and then start serving it with its ts files. This causes the frontend HLS player to show the length of the video to the combined length of the generated chunks which gets longer as time goes on until its fully there. It totally makes sense but was wondering what the correct way of showing the full length in the player even though its not fully created yet ?

  


  Im using react-hls-player for playing the stream and spring-boot + a java ffmpeg wrapper to transcode the video.

  


  Might be thinking about this the wrong way so feel free to correct me if im in the wrong path !

  


• Crop and pinch zoom image with FFMPEG

  27 septembre 2022, par hugger

  I am working on a simple photo editor component for a mobile app which requires the user to be able to pan and scale (zoom) an image to be cropped. S/O to @kesh for the help so far !

  


  With the pinch zoom value which ranges from 1-5, I wish to use this in my FFMPEG execution along with the crop command :

  


    cropSelected() {
    this.setState({ isCropping: true });

    const diff =
      this.props.videoHeight / (this.state.aspectRatio * deviceWidth);
    const offsetDiff = this.state.offsetTopTranslate * diff;

    var filterPathPostCrop =
      this.props.type === 'photo'
        ? RNFS.DocumentDirectoryPath + '/afterCrop.png'
        : this.props.type === 'gif'
        ? RNFS.DocumentDirectoryPath + '/afterCrop.gif'
        : RNFS.DocumentDirectoryPath + '/afterCrop.mp4';
    //hardcoded zoom at 1.2x for example!
    FFmpegKit.execute(
      `-y -i ${this.state.mediaSource} -vf "crop=iw/1.2:ih/1.2:0:${offsetDiff},scale=iw:-1" -qscale 0 -frames:v 1 ${filterPathPostCrop}`
    ).then(async (session) => {
      const returnCode = await session.getReturnCode();
      if (ReturnCode.isSuccess(returnCode)) {
        // SUCCESS

        Animated.spring(this._pinchScale, {
          toValue: 1,
          useNativeDriver: true,
        }).start();

        this.setState(
          {
            mediaSource: filterPathPostCrop,
            videoSourcePreview: `${filterPathPostCrop}?${new Date().getTime()}`,
            ffMPEGinProgress: null,
            aspectRatio: 1080 / 1080,
            videoTime: 0,
            isPlayingVideo: false,
            isCropping: false,
            filterOutputIsAlt: !this.state.filterOutputIsAlt,
            wasCropped: true,
          });
      } else if (ReturnCode.isCancel(returnCode)) {
        // CANCEL
      } else {
        // ERROR
        alert('error');
      }
    });
  }


  


  I drew this to illustrate what I am trying to achieve here.

  


  

  


  I hope this helps !

  


• Remove Unnecesary Maven Dependencies from Eclipse

  18 mai 2021, par ur3k

  I am working with Spring-Boot 2.3.8 and Eclipse.

  


  I am using these dependencies to work on some videos :

  


      &#xA;    <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>javacv</artifactid>&#xA;        <version>1.5.4</version>&#xA;    </dependency>&#xA;&#xA;    &#xA;    <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>opencv-platform</artifactid>&#xA;        <version>4.4.0-1.5.4</version>&#xA;    </dependency>&#xA;&#xA;    &#xA;    <dependency>&#xA;        <groupid>org.bytedeco</groupid>&#xA;        <artifactid>ffmpeg-platform</artifactid>&#xA;        <version>4.3.1-1.5.4</version>&#xA;    </dependency>&#xA;    &#xA;

  


  Eclipse is adding all JARs of opencv, javaccp and ffmpeg, including JARs for Androind, MacOs, etc. I just need the ones for Windows and the problem is that these extra dependencies are creating problems for my teams when they try to load the project, build or test it (it is extreamly slow or just doesnt work).

  


  These dependencies are not present in my final WAR when I build with maven form the command line and I use :

  


  mvn -Djavacpp.platform=windows-x86_64 clean install 


  


  Is there a way to tell eclipse to do the same ?

  


  The WAR size goes from 800 MB to around 200 MB when building without and with and the platform flag, these extra 600 MB are what in my opinion is too much for eclipse.

  


  Here is an image of all the JARs being added to the project.