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• Video encryption cannot be played, no key file is found [closed]

  15 août 2021, par rin ye

  This is a video clip downloaded from a software, but I don't know what encryption method is used for this video. Does anyone know what encryption method is used ?https://drive.google.com/file/d/15ZypIca-ljzF-Oh_9jBMXPFUuXbOr16P/view?usp=sharing

  


• Console Log Stream information using ffmpeg node.js

  5 mars 2019, par Matteo

  I have created a work application that links in room encoders to live stream onto Facebook, Twitter and Youtube. I am wondering as to how to properly log the stream quality on the CMD. Below are snippets of the code and where I think the logic should be to properly pull the stream quality and display it in the cmd :

  Pushing Stream :

      if (req.query.french_facebook) {
  
    var streamComplete = req.query.fb_fre_streamURL + req.query.fb_fre_streamKey;
  
    temp = checkValidity('Facebook', 'French', req.query.fb_fre_streamURL, req.query.fb_fre_streamKey, status);
  
    status = temp[0];
  
    valid = temp[1];
  
    if (valid == true) {
  
      var command = `ffmpeg -re -i ${inputURL2('French',req.query.fb_fre_venue)} -c:v copy -acodec aac -ac 1 -ar 44100 -x264-params keyint=60:scenecut=0 -strict -2 -f flv "${streamComplete}"`;
  
      var process = nodeCmd.run(command);
  
      createStream(req.query.username, 'Facebook', 'French', req.query.fb_fre_streamKey, process.pid);
  
    } else {
  
      console.error("ERROR: unable to create stream");
  
    }
  
  }

  App initialization :

      var createError = require('http-errors');
  
  var express = require('express');
  
  var path = require('path');
  
  var cookieParser = require('cookie-parser');
  
  var logger = require('morgan');
  
  
  
  var indexRouter = require('./routes/index');
  
  var usersRouter = require('./routes/users');
  
  
  
  var app = express();
  
  
  
  var fs = require('fs');
  
  
  
  // view engine setup
  
  app.set('views', path.join(__dirname, 'views'));
  
  app.set('view engine', 'ejs');
  
  
  
  // app.use(logger('dev'));
  
  app.use(express.json());
  
  app.use(express.urlencoded({ extended: false }));
  
  app.use(cookieParser());
  
  app.use(express.static(path.join(__dirname, 'public')));
  
  
  
  app.use('/', indexRouter);
  
  app.use('/users', usersRouter);
  
  
  
  // catch 404 and forward to error handler
  
  app.use(function(req, res, next) {
  
    next(createError(404));
  
  });
  
  
  
  // error handler
  
  app.use(function(err, req, res, next) {
  
    // set locals, only providing error in development
  
    res.locals.message = err.message;
  
    res.locals.error = req.app.get('env') === 'development' ? err : {};
  
  
  
    // render the error page
  
    res.status(err.status || 500);
  
    res.render('error');
  
  });
  
  
  
  module.exports = app;

  If there is anything I am not making clear please let me know

• zbar not working on netcat video stream from raspberry pi read using OpenCV

  26 décembre 2017, par Snehil Vijay

  I am streaming video feed from raspberry pi using netcam to my PC and using zbar to read qr codes i the feed.
  I am reading the named pipe using ffmpeg :

  FFMPEG_BIN = "ffmpeg"
  
  command = [ FFMPEG_BIN,
  
      '-i', 'fifo264',             # fifo is the named pipe
  
      '-pix_fmt', 'gray',      # opencv requires bgr24 pixel format.
  
      '-vcodec', 'rawvideo',
  
      '-an','-sn',              # we want to disable audio processing (there is no audio)
  
      '-f', 'image2pipe', '-']    
  
  pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8)

  zbar is showing no output in this case.
  Complete code :

  import cv2
  
  import subprocess as sp
  
  import numpy
  
  import zbar
  
  from PIL import Image
  
  
  
  
  
  FFMPEG_BIN = "ffmpeg"
  
  command = [ FFMPEG_BIN,
  
          '-i', 'fifo264',             # fifo is the named pipe
  
          '-pix_fmt', 'gray',      # opencv requires bgr24 pixel format.
  
          '-vcodec', 'rawvideo',
  
          '-an','-sn',              # we want to disable audio processing (there is no audio)
  
          '-f', 'image2pipe', '-']    
  
  pipe = sp.Popen(command, stdout = sp.PIPE, bufsize=10**8)
  
  
  
  while True:
  
      # Capture frame-by-frame
  
      raw_image = pipe.stdout.read(1920*1088)
  
      # transform the byte read into a numpy array
  
      image =  numpy.fromstring(raw_image, dtype='uint8')
  
      image = image.reshape((1088,1920))          # Notice how height is specified first and then width
  
      if image is not None:
  
          cv2.imshow('Video', image)
  
          image = Image.fromarray(image)
  
          width, height = image.size
  
          zbar_image = zbar.Image(width, height, 'Y800', image.tostring())
  
  
  
          # Scans the zbar image.
  
          scanner = zbar.ImageScanner()
  
          scanner.scan(zbar_image)
  
  
  
          # Prints data from image.
  
          for decoded in zbar_image:
  
              print(decoded.data)
  
  
  
      if cv2.waitKey(1) & 0xFF == ord('q'):
  
          break
  
      pipe.stdout.flush()
  
  
  
  cv2.destroyAllWindows()