Recherche avancée

Sur d’autres sites (14071)

• Ffmpeg stream problems with buffer data

  27 juin 2023, par Erdem Ün

  my code is not working. I cannot conversion. how can I fix ?

  


  readable event working but Error output is

  


  


  data undefined

  


  


  try {

    const readStream = fs.createReadStream('./ses.webm');

    const command = childProcess.spawn('ffmpeg', ['-i', 'pipe:0', '-c:a', 'aac', 'pipe:1']);

    readStream.pipe(command.stdin);
    command.stdout.on('readable', (a) => {
      console.log('data', a)
    });

    command.on('data', (code) => {
      console.log(`ffmpeg işlemi tamamlandı. Çıkış kodu: ${code}`);
    });
  } catch (error) {
    console.log(error)
  }


  


• Need a better understanding of HTML 5 audio/video meta data use and placement

  24 juin 2012, par nicoz

  I have spent a significant amount of time researching HTML 5 audio and video, however I am stuck understandong the encoding of the meta data. It seems that in my research, using programs like Handbrake (ffmpeg) it is recommend to check of "web optimized" (also using this type of setting when say exporting from imovie). I have concluded that this has to do with moving the file's meta data to the beginning of the file. This then gives the player/browser the info it requires to play immediately without having to wait to load the entire file.

  So here is where I am confused and the questions

  Does this only apply to mp4 files ? (I need to also encode/transcode .ogv and .webm)
  Where does the mp4 MOOV atom fit into this or is that what people are referring to, when they say move the meta data to the front of the file ?

• How to add telemetry data from a video to jpg file ?

  10 septembre 2021, par code0x00

  I have a 360deg video that is created by Go Pro Fusion and has telemetry data in it. I want to extract the telemetry data and put inside of jpg file.

  


  I am extracting images using ffmpeg :

  


  ffmpeg -i VIDEO.mp4 -r 5 img%d.jpg


  


  How can i extract metadata(including telemetry data) for each frame and put that metadata inside jpg image of that frame.

  


  I tried using

  


  exiftool -ee -a -u -U -TagsFromFile video.mp4 img1.jpg


  


  But all the metadata that appear in video does not appear in image.

  


  I tried this :

  


  exiftool -track1:VideoFrameRate=29.97  img1.jpg 


  


  But getting this warning :

  


  Warning: Sorry, Track1:VideoFrameRate doesn't exist or isn't writable
Nothing to do.


  


  20.00


  


  I get this from video. But unable to set in jpg as mentioned above.

  


  And how to ensure that the images are assigned with the exact GPS data ?