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• Revision f167433d9c : fix the mv_ref_idx issue The following issue was reported : https://code.google

  20 août 2013, par Jim Bankoski

  Changed Paths :
   Modify /vp9/common/vp9_mvref_common.c

  
  
  fix the mv_ref_idx issue

  The following issue was reported :
  https://code.google.com/p/webm/issues/detail?id=601&q=jimbankoski&sort=-id&colsp
  ec=ID%20Pri%20mstone%20ReleaseBlock%20Type%20Component%20Status%20Owner%20Summar
  y

  This code makes the choice and code cleaner and removes any question
  about whether the border needs to be checked.

  Change-Id : Ia7aecfb3168e340618805bd318499176c2989597

• how to us google ML kit Selfie segmentation in flutter to overlay segmented user on top of chosen image or video ? [closed]

  4 avril 2024, par Amr

  I'm working on implementing a virtual background feature using the Google ML Kit selfie segmentation Flutter plugin. The goal is to separate the user from the background live from the camera feed, overlay the user on a chosen image or video, and then create a new video combining these elements.

  


  Currently, I'm successfully obtaining the mask using the plugin. However, I'm concerned about performance issues if I directly copy pixels to achieve the overlay effect, especially in real-time scenarios.

  


  I'm looking for alternative approaches or best practices to efficiently achieve this functionality without sacrificing performance. Any insights or suggestions on how to approach this would be greatly appreciated.

  


  I thought about using ffmpeg but not sure how to take the user pixels from the camera feed, I am not a flutter developer so not sure how to do so.

  


• google function : TypeError : Cannot read property 'name' of undefined

  9 décembre 2019, par Juggernaught

  I’m trying to use Google cloud function to transcode videos from a storage bucket and outputs into another bucket using code posted online but with a few adjustments.

  but I get the following error :

  TypeError : Cannot read property ’name’ of undefined at transcodeVideo
  (/srv/index.js:17:56) at /worker/worker.js:825:24 at at
  process._tickDomainCallback (internal/process/next_tick.js:229:7)

  Index.js

  const {Storage} = require('@google-cloud/storage');
  
  const projectId = 'cc18-223318';
  
  const storage = new Storage({
  
      projectId: projectId,
  
  });
  
  const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
  
  const ffmpeg = require('fluent-ffmpeg');
  
  
  
  const transcodedBucket = storage.bucket('2400p');
  
  const uploadBucket = storage.bucket('inpuut');
  
  ffmpeg.setFfmpegPath(ffmpegPath);
  
  
  
  exports.transcodeVideo = function transcodeVideo(event, callback) {
  
    const file = event.data;
  
    // Ensure that you only proceed if the file is newly created, and exists.
  
    if (file.metageneration !== '1' || file.resourceState !== 'exists') {
  
      callback();
  
      return;
  
    }
  
  
  
    // Open write stream to new bucket, modify the filename as needed.
  
    const remoteWriteStream = transcodedBucket.file(file.name.replace('.webm', '.mp4'))
  
      .createWriteStream({
  
        metadata: {
  
          metadata: file.metadata, // You may not need this, my uploads have associated metadata
  
          contentType: 'video/mp4', // This could be whatever else you are transcoding to
  
        },
  
      });
  
  
  
    // Open read stream to our uploaded file
  
    const remoteReadStream = uploadBucket.file(file.name).createReadStream();
  
  
  
    // Transcode
  
    ffmpeg()
  
      .input(remoteReadStream)
  
      .outputOptions('-c:v libx264') // Change these options to whatever suits your needs
  
      .outputOptions('-c:a copy')
  
      .outputOptions('-vf "scale=4800:2400"')
  
      .outputOptions('-b:a 160k')
  
      .outputOptions('-b:a 160k')
  
      .outputOptions('-x264-params mvrange=511')
  
      .outputOptions('-f mp4')
  
      .outputOptions('-preset slow')
  
      .outputOptions('-movflags frag_keyframe+empty_moov')
  
      .outputOptions('-crf 18')
  
      // https://github.com/fluent-ffmpeg/node-fluent-ffmpeg/issues/346#issuecomment-67299526 
  
      .on('start', (cmdLine) => {
  
        console.log('Started ffmpeg with command:', cmdLine);
  
      })
  
      .on('end', () => {
  
        console.log('Successfully re-encoded video.');
  
        callback();
  
      })
  
      .on('error', (err, stdout, stderr) => {
  
        console.error('An error occured during encoding', err.message);
  
        console.error('stdout:', stdout);
  
        console.error('stderr:', stderr);
  
        callback(err);
  
      })
  
      .pipe(remoteWriteStream, { end: true }); // end: true, emit end event when readable stream ends
  
  };