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• ffmpeg - how to preview video frames along with progress bar of media player

  18 octobre 2019, par Zaheer Abbas

  I built a media player in pyqt5 with some editing options like (line and polygon) to edit features etc... now I want to see the edited frames along with the progress bar (as we see in the youtube) of the player How I can add the functionality of preview frames along with the progress bar in the player using ffmpeg or other option.

• sharedarraybuffer error in edge and firefox but not in chrome when uploading with ffmpeg in nodejs

  29 juillet 2021, par Juliette

  I have the code below in React.js that uses ffmpeg to convert files :

  


  import { createFFmpeg, fetchFile } from '@ffmpeg/ffmpeg';

  const doTranscode = async () => {
    setMessage('Loading ffmpeg-core.js');
    await ffmpeg.load();
    setMessage('Uploading file');
    ffmpeg.FS('writeFile', filename, await fetchFile(file));
    await ffmpeg.run('-i', filename, 'test.wav');
    setMessage('Upload to manager complete. Sound file will be available and playable on the manger within 1-2 minutes.');
    const data = ffmpeg.FS('readFile', 'test.wav');
    setAudioSrc(URL.createObjectURL(new Blob([data.buffer], { type: 'audio/wav' })));

    var file_name = prompt('What would you like to call this file?');

    if (!file_name) {
      file_name = Date.now()
    }
    
    (async function(){
      let output = await getSoundID(customer_id, file_name);
      let sound_id = output.data;
      var bucket_file = new File([new Blob([data.buffer], { type: 'audio/wav' })], "sounds/" + customer_id + "/" + sound_id + ".wav");
      uploadFileToS3(bucket_file);
      updateSoundData(sound_id, customer_id);
    })();
  };

  useEffect(() => {
    if (file) {
      doTranscode()
    }
  }, [file])


  


  The code above works great in Chrome and the files are successfully converted. However, when I bring it to Firefox or Edge I get this error Unhandled Rejection (ReferenceError): SharedArrayBuffer is not defined.

  


  I looked up this issue and they said I need to modify my headers to include this :

  


  You need to set two response headers for your document:

Cross-Origin-Opener-Policy: same-origin Cross-Origin-Embedder-Policy: require-corp


  


  Not sure how I would this in my JS code ?

  


  Would love to hear what you guys think.

  


• avcodec/mpeg4videodec : Workaround interlaced mpeg4 edge MC bug

  12 novembre 2016, par Michael Niedermayer

  avcodec/mpeg4videodec : Workaround interlaced mpeg4 edge MC bug
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/avcodec.h
  • [DH] libavcodec/mpeg4videodec.c
  • [DH] libavcodec/mpegvideo.c
  • [DH] libavcodec/mpegvideo_motion.c
  • [DH] libavcodec/options_table.h