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• Passing streams from Fluent-ffmpeg to Google Cloud Storage

  31 octobre 2019, par Emilio Faria

  Is there a way to pass a stream from Fluent-mmpeg to Google Cloud Storage ? I’m trying to allow the user to upload any kind of media (audio or video), and I want to convert it to flac before uploading it to GCS.

  I’m using a few middlewares on my route, such as :

  routes.post(
  
    '/upload',
  
    multer.single('audio'),
  
    ConvertController.convert,
  
    UploadController.upload,
  
    FileController.save,
  
    (req, res, next) => res.send('ok')
  
  );

  I was able to stream from Multer to Fluent-mmpeg and save to a file using this code on ConvertController :

  async convert(req, res, next) {
  
      ffmpeg(streamifier.createReadStream(req.file.buffer))
  
        .format('flac')
  
        .output('outputfile.flac')
  
        .audioChannels(1)
  
        .on('progress', function(progress) {
  
          console.log(progress);
  
        })
  
        .run();
  
    }

  But I would like to use .pipe() to pass it to UploadController, where I would then upload to GCS :

  class UploadController {
  
    async upload(req, res, next) {
  
      const gcsHelpers = require('../helpers/google-cloud-storage');
  
      const { storage } = gcsHelpers;
  
  
  
      const DEFAULT_BUCKET_NAME = 'my-bucket-name';
  
  
  
      const bucketName = DEFAULT_BUCKET_NAME;
  
      const bucket = storage.bucket(bucketName);
  
      const fileName = `test.flac`;
  
      const newFile = bucket.file(fileName);
  
  
  
      newFile.createWriteStream({
  
        metadata: {
  
          contentType: file.mimetype
  
        }
  
      })
  
  
  
      file.on('error', err => {
  
        throw err;
  
      });
  
  
  
      file.on('finish', () => console.log('finished'));
  
    }

  The problem is that I cannot find anywhere explaining how I can pass down a stream to the next middleware.

  Is it possible ?

• FFmpeg doesn't work on android 10, goes strait to onFailure(String message) with empty message

  18 janvier 2020, par nolanic

  I’m using FFmpeg in one of my projects for video compression. On Android 10 (Google Pixel 3a), it goes straight to onFailure(String message) with empty message for any command sent for execution.

  so I have (api ’com.writingminds:FFmpegAndroid:0.3.2’) specified in my app gradle file,

  permission (android.permission.WRITE_EXTERNAL_STORAGE) in the manifest is specified

  So I do :

  InitializationCallback initializationCallback = new InitializationCallback();
  
      try {
  
          FFmpeg.getInstance(context).loadBinary(initializationCallback);
  
      } catch (FFmpegNotSupportedException e) {
  
          initializationCallback.onFailure();
  
          initializationCallback.onFinish();
  
      }

  Initializes just fine, no problems here.

  Later :

  void getData(File inputFile) {
  
  //inputFile points to: /storage/emulated/0/Android/data/{package_name}/files/temp_files/temp_1.mp4
  
          String[] cmd = ("-i " + inputFile.getAbsolutePath()).split(" ");
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }
  
      }
  
  
  
      @Override
  
      public void onStart() {
  
           //This method is called
  
      }
  
  
  
      @Override
  
      public void onSuccess(String message) {
  
           //This method is NOT called
  
           extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onProgress(String message) {
  
          //This method is NOT called
  
          extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onFailure(String message) {
  
          //This method is called and the message is empty
  
          extractAvailableData(message);
  
      }
  
  
  
      @Override
  
      public void onFinish() {
  
          //This method is called
  
      }

  If I do something like :

  String command = "-i ***/file1.mp4 -map 0:v -map 0:a -preset ultrafast -s:v 750:350 ***/file2.mp4";
  
  //file2.mp4 is a non existent file at this point
  
  // (***) --> is just a replacement for the full path of the file, just to keep things shorter here.
  
  
  
  String[] cmd = command.split(" ");
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }

  gives the same result, no video conversion, just a call to onFailure("Nothing")

  Even if I do :

  String[] cmd = {"-version"};
  
          try {
  
              FFmpeg.getInstance(App.instance).execute(cmd, this);
  
          } catch (FFmpegCommandAlreadyRunningException e) {
  
              throw new Error(e);
  
          }

  I get nothing, no output at all.

  I encountered this issue only on Android 10 so far, it works fine on other devices.

• ffmpeg include issue - some functions are missing

  27 septembre 2019, par Thomas Ayoub

  I try to follow and adapt this example to convert a video thanks to FFMPEG but some function seems to be missing like :

  int avcodec_open ( AVCodecContext * avctx, AVCodec * codec)     

  When I go in the doc to see where it come from, I find it in the file libavcodec/avcodec.h which is included in my program #include "libavcodec/avcodec.h" (in the top of my .h file).

  Given this, I don’t understand why Qt throw me this error :

  ../../Dev/Joker/libs/PhVideo/PhVideoEncoder.cpp:360:6: error: use of undeclared identifier 'avcodec_open'
  
      if (avcodec_open(c, codec) < 0) {