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• From 2 videos create one split screen video, 2 separate audio streams and a thumbnail from the resultant split screen video - all in one pass

  27 avril 2020, par Ben Hardy

  I'm using ffmpeg to create several single splitscreen videos out of 2 separate videos. The 2 videos have audio so I want to extract the 2 video's audio streams as 2 separate mp3s and also create a thumbnail out of the finished splitscreen video. Is it possible to do these 3 actions in one pass ?
  
Here is the code I'm using to create the splitscreen and the 2 separate mp3

  



  ffmpeg -i input0.mov -i input1.mov -filter_complex "[0]scale=640x360[v0];[1]scale=640x360[v1];[v0][v1] hstack[v]" -map "[v]" output.mp4 -map 0:a audio0.mp3 -map 1:a audio1.mp3

  



  However I want to also create a thumbnail out of the resultant split screen video in the same pass, but if I add "image.jpg" at the end it only makes a thumbnail out of input1.mov not the resultant splitscreen video made from input0 and input1 and makes all the outputs only 1 frame long. Here is the code :

  



  ffmpeg -i input0.mov -i input1.mov -filter_complex "[0]scale=640x360[v0];[1]scale=640x360[v1];[v0][v1] hstack[v]" -map "[v]" output.mp4 -map 0:a audio0.mp3 -map 1:a audio1.mp3 image.jpg

  



  Is there a solution to this that will let me create all the correct outputs in one pass ?

  


• Can't upload huge video to google storage. I using "@ffmpeg-installer/ffmpeg" and @google-cloud/storage

  20 juillet 2022, par Dmytro Petskovych

  I upload file to google storage using "@ffmpeg-installer/ffmpeg" and @google-cloud/storage in my node.js App.
Step 1. file uploading to fs is in child processes - one process for each type of resolution (totaly six).
step 2. encription (converting to stream)
step 3. upload to google storage

  


  I use "Upload a directory to a bucket" in order to send the video from the client to the Google Cloud Storage bucket.

  


  This way is working fine only with small file.

  


  when I upload video, actually I upload six videos, one for each type resolution

  


  for example when I upload video with duration one hour it split on chunk and totally I get more three thousands files.

  


  So actually i upload folder with large amount of files, but not all of this files are uploaded to cloud.

  


  maybe someone had the similar problem and helps fix it.

  


  


  


  const uploadFolder = async (bucketName, directoryPath, socketInstance) => {
    try {
      let dirCtr = 1;
      let itemCtr = 0;
      const fileList = [];

      const onComplete = async () => {
        const folderName = nanoid(46);

        await Promise.all(
          fileList.map(filePath => {
            const fileName = path.relative(directoryPath, filePath);
            const destination = `${ folderName }/${ fileName }`;

            return storage
              .bucket(bucketName)
              .upload(filePath, { destination })
              .then(
                uploadResp => ({ fileName: destination, status: uploadResp[0] }),
                err => ({ fileName: destination, response: err })
              );
          })
        );

        if (socketInstance) socketInstance.emit('uploadProgress', {
          message: `Added files to Google bucket`,
          last: false,
          part: false
        });

        return folderName;
      };

      const getFiles = async directory => {
        const items = await fs.readdir(directory);
        dirCtr--;
        itemCtr += items.length;
        for(const item of items) {
          const fullPath = path.join(directory, item);
          const stat = await fs.stat(fullPath);
          itemCtr--;
          if (stat.isFile()) {
            fileList.push(fullPath);
          } else if (stat.isDirectory()) {
            dirCtr++;
            await getFiles(fullPath);
          }
        }
      }

      await getFiles(directoryPath);

      return onComplete();
    } catch (e) {
      log.error(e.message);
      throw new Error('Can\'t store folder.');
    }
  };

  


  


  



• Revision d7eea782f2 : Extend number of reference buffers to 8. The number of reference buffers is ext

  3 mai 2013, par Adrian Grange

  Changed Paths :
   Modify /vp9/common/vp9_entropymode.c

  
   Modify /vp9/common/vp9_onyxc_int.h

  
   Modify /vp9/decoder/vp9_decodframe.c

  
   Modify /vp9/encoder/vp9_bitstream.c

  
  
  Extend number of reference buffers to 8.

  The number of reference buffers is extended to 8 and
  a reference sign-bias added for the LAST_FRAME.

  Whilst the number of reference buffers used by an
  individual frame remains unchanged at 3, these may
  now be selected from 8 possible buffers.

  Change-Id : I2d247b9c1c2b3a339d6c9fac125e81ba373f75a7