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• Decoder error not supported error when render 360 video on web application

  19 avril 2024, par Mattia Pompita

  I'm developing a simple scene with A-Frame and React.JS where there is a videosphere that will create and render when video are fully loaded and ready to play.

  


  My goal is to render 4k (to device who can reproduce it) video on videosphere to show at the users the environment.
On desktop versions all works fine also with 4K videos while on mobile works only for 1920x1080.

  


  I already check if my phone can render a 4k texture video and it can render untill 4096, I checked also that video.videoWidth are 4096.

  


  The error I have is with decoder

  


  MediaError {code: 4, message: 'DECODER_ERROR_NOT_SUPPORTED: video decoder initialization failed'}


  


  This error will show only on mobile, I can see it through Chrome Developer tools, I already try to re-encode both with Handbrake and ffmpeg but always the same error will appear on mobile.

  


  My video is hosted on Firebase and have this resolution 4096x2048
I'm testing on Google Pixel 7 already checked if WEBGL can render 4k texture on it

  


  I can't understand why decoder works fine on Desktop and not on mobile only with 4k video and with 1920x1080 it works

  


  This is the only component rendered on page

  


  import React, { useEffect, useRef } from 'react';

const XIV_360_Abbazia_San_Silvestro_4K = () => {
  const assetsRef = useRef(null);
  const videoRef = useRef(null);
  const sceneRef = useRef(null);


  return (
    
      
        > {
            console.log('CAN PLAY THROUGH');
            let videoSphere = document.createElement('a-videosphere');
            videoSphere.setAttribute('src', '#video360');
            sceneRef.current.appendChild(videoSphere);
          }}
        />
      
      

      > {
          videoRef.current.play();
        }}
      >
        PLAY
      
    
  );
};

export default XIV_360_Abbazia_San_Silvestro_4K;


  


• Ffmpeg Command in Android not working. Creating a Video of several Images

  23 décembre 2020, par Steve Jobs Kappa

  I Try to load png's from my Folder and put it together in a single Video.
I'm using Mobile-FFmpeg as Library and Android Studio

  



  But I keep getting the ErrorCode after executing the Command :

  



  I/mobile-ffmpeg : Command execution failed with rc=1 and the output below.

  



  My Images are saved like this earlier

  



  

  



  The Command i Use :
 int rc = FFmpeg.execute(" ffmpeg -r 1/5 -i "+ src+"/img%03d.png -c:v libx264 -vf \"fps=25,format=yuv420p\" "+ src + "/ou1t.mp4") ;

  



  Here is the whole Code :

  



                 String dirPath = Environment.getExternalStorageDirectory().getAbsolutePath()+"/FlyerMaker/ffmpeg";
            File dir = new File(dirPath);
            String src = Environment.getExternalStorageDirectory().getAbsolutePath()+"/FlyerMaker/ffmpeg";

            int rc = FFmpeg.execute(" ffmpeg -r 1/5 -i "+ src+"/img%03d.png -c:v libx264 -vf \"fps=25,format=yuv420p\" "+ src + "/ou1t.mp4");

            if (rc == RETURN_CODE_SUCCESS) {
                Log.i(Config.TAG, "Command execution completed successfully.");
            } else if (rc == RETURN_CODE_CANCEL) {
                Log.i(Config.TAG, "Command execution cancelled by user.");
            } else {
                Log.i(Config.TAG, String.format("Command execution failed with rc=%d and the output below.", rc));
                Config.printLastCommandOutput(Log.INFO);
            }


  



  //clearing the Folder since I don't need the pics anymore right after the code above

  



              for(int i = 0; i < 20 ; i++){
                String filePrefix = "img"; //imagename prefix
                String fileExtn = ".png";//image extention
                String a = filePrefix + String.format("%03d", i)+fileExtn;
                File file = new File(dir, a);
                file.delete();
                System.out.println("del"+i);
            }


  


• How to fix ffmpeg from producing dark images

  28 septembre 2019, par edwardv

  I am running a batch file to bulk resize images. The output jpgs are coming out darker. I looked up the metadata of the input and output files. The input had a color space CMYK and the output color space was wiped.

  The code below is what I am using for the batch file. I tried using the same batch file on an image with a RGB color space and the output colors were fine. I am assuming it’s the CMYK parameter is the issue.

  for %%A in (*.jpg) do ffmpeg -i "%%A" -vf "scale=w=1500:h=1800:force_original_aspect_ratio=1,pad=1500:1800 :(ow-iw)/2 :(oh-ih)/2:white" resized\%%A"

  What do I modify in the ffmpeg code in order to make sure the jpg input and output files look exactly the same ? Of course not in size.