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• Merge Multiple Videos using node fluent ffmpeg

  8 juillet 2015, par shyamshyre

  requirement is to read all the files in the directory and merge them.
  I am using node fluent-ffmpeg to achieve this.
  First of all reading all the files in the directory appending concatenating the string by adding .input.

  var finalresult="E:/ETV/videos/finalresult.mp4"
  
  outputresult : It consists of all the files read in the directory.
  
  
  
  /*Javascript*/
  
  MergeVideo(outputresult);
  
  function MergeVideo(outputresult){
  
  console.log("in merge video");
  
  var videostring = "";
  
  
  
  for(i=1;i<5;i++)
  
      {
  
  videostring = videostring+".input("+"'"+outputresult[i]+"'"+")";
  
  }
  
  console.log("Video String"+videostring);
  
      var proc = ffmpeg()+videostring
  
      .on('end', function() {
  
        console.log('files have  succesfully Merged');
  
          })
  
      .on('error', function(err) {
  
        console.log('an error happened: ' + err.message);
  
      })
  
      .mergeToFile(finalresult);
  
  }

  It gives the following error :

  TypeError: Object .input('ETV 22-02-2015 1-02-25 AM.mp4').input('ETV 22-02-2015
  
  9-33-15 PM.mp4').input('ETV 22-02-2015 9-32-46 AM.mp4').input('ETV 22-02-2015 8-
  
  32-44 AM.mp4') has no method 'on'
  
      at MergeVideo (D:\Development\Node\node-fluent-ffmpeg-master\node-fluent-ffm
  
  peg-master\examples\demo.js:140:6)
  
      at Object.<anonymous> (D:\Development\Node\node-fluent-ffmpeg-master\node-fl
  
  uent-ffmpeg-master\examples\demo.js:129:1)
  
      at Module._compile (module.js:456:26)
  
  </anonymous>

  Any help is appreciated.

• Simultaneously map video and data streams to one subprocess pipeline in real-time

  9 février 2023, par seabass1217

  I need to process the video stream and the klvdata streams simultaneously in real-time in OpenCV/Python. I'm using FFMPEG to read the file or stream as OpenCV does not retain the klvdata. I pass the data to OpenCV with the subprocess module.

  


  My problem is I cannot figure out how to map both the video and klvdata to the same subprocess pipe simultaneously ?

  


  My code :

  


  #!/usr/bin/env python3
import sys, json, klvdata;
from subprocess import PIPE
import subprocess as sp
import cv2
import numpy

command = ['ffmpeg',
    '-i', 'DayFlight.mpg',
    '-map', '0:0',
    '-map', '0:d',        
    '-pix_fmt', 'bgr24',
    '-c:v', 'rawvideo',      
    '-an','-sn',              
    '-f', 'image2pipe', '-',
    '-c:d', 'copy',
    '-f','data',
    ]

pipe = sp.Popen(command, stdin=sp.PIPE, stdout=sp.PIPE, stderr=sp.PIPE, bufsize=10**8)

while True:
   raw_image = pipe.stdout.read(1280*720*3)
   image =  numpy.fromstring(raw_image, dtype='uint8')
   image = image.reshape((720,1280,3))          
   if image is not None:
      cv2.imshow('Video', image)
   if cv2.waitKey(1) & 0xFF == ord('q'):
      break
   for packet in klvdata.StreamParser(pipe.stdout): 
      metadata = packet.MetadataList()
      print(metadata)
pipe.stdout.flush()
cv2.destroyAllWindows()



  


  Produces the below error :

  


  Traceback (most recent call last):&#xA;  File "test_cv.py", line 32, in <module>&#xA;    metadata = packet.MetadataList()&#xA;AttributeError: &#x27;UnknownElement&#x27; object has no attribute &#x27;MetadataList&#x27;&#xA;&#xA;</module>

  


  Any help is greatly appreciated.

  


• Use of ffprobe in kivy 'File not Found'

  3 juillet 2022, par Pranzal360

  i am trying to convert audio from webm to mp3 using pudub module in android using kivy. I've included pydub,ffprobe-python,ffmpeg-python in buildozer.spec file but when i run the app i get the following error !

  


  FileNotFoundError: [Errno 2] No such file or directory: 'ffprobe'