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• How to extract audio tracks from a stream using FFMPEG or other tools ?

  17 septembre 2023, par Vassili Bagrov

  Here is the stream link that I am trying to download.

  


  I can download the video, but for some reason it doesn't include the audio stream.

  


  The audio stream is also in .ts format and has 1569 chunks.

  


  When I downloaded all the audio files, I tried to convert them in single temp.ts file to them convert it into an mp3 file with this command :

  


  cat audio_7e42e066-9f6c-44f4-9ac8-10b50c3edfae_*.ts > temp.ts


  


  I tried to then convert it into an mp3 file with this command :

  


  ffmpeg -i temp.ts -acodec copy out.mp3


  


  But got an error :

  


  temp.ts: Invalid data found when processing input


  


  What are my options to download audio files ? There are actually 3 audio tracks if I watch the video from the website.
Please tell me there is a way to do it other than screen record the whole video.

  


• video preview from remote mp4 [h264] file

  20 novembre 2015, par sathia

  I was trying to make a video preview from a remote video (smaller size, short clip and no audio. you get the idea)

  By knowing the video duration, and bitrate (constant) is rather easy to make several byte-range requests in order to fetch chunks of it.

  Once all the needed chunks are downloaded I use the "concat" method of ffmpeg to make a single video (this is in order to avoid to download all the video locally)

  well, technically it all works perfectly the problem is that most of the chunks I download have pretty severe aberrations, and I mean, it’s usually all green and pixelated, rubbish.

  Is this a limit on the h264 protocol or I should maybe find the first keyframe and start from there (on each chunk of course) ? thanks

• i have problem in python with Muxing video and audio

  2 février 2021, par Mahmoud Ahmed

  I want to merge files video and audio but I don't know how I did try many times to fix it with ffmpeg,subprocess and moviepy with a deferent ways so this my problem and I stop work on it here if someone can help me to edit it and send to me back please .

  


  This is my code with a window .

  


  from pytube import YouTube
from tkinter import *
from tqdm import tqdm
from os import startfile
import subprocess
import shutil
import pytube
import ffmpeg
import time
import sys
import os
#Functions
def download():
    video_url = url.get()
    try:
        youtube = pytube.YouTube(video_url)
        video   = youtube.streams.filter(adaptive=True,file_extension='mp4').order_by('resolution').desc().first()
        video.download(filename='Dvideo')
        audio = youtube.streams.get_by_itag(251).download(filename='Daudio')  #webm               
        notif.config(fg="green",text="Download is Completed")



    except Exception as e:
        print(e)
        notif.config(fg="red",text="There is an Error in the Downloading Check Your url")

def Merge():
    try:
        os.system("ffmpeg -i Dvideo.mp4 -i Daudio.webm -c:v copy -c:a aac output.mp4")
        #video = ffmpeg.input('Dvideo.mp4')
        #audio = ffmpeg.input('Daudio.webm')
        #out = ffmpeg.output(video, audio, r'final.mp4', vcodec='"avc1.640028')
        #out.run()

    except Exception as w:
        print(w)
        notif.config(fg="red",text="There is an Error in the Merge")

#Main Screen
Window = Tk()
Window.title("Youtube Video Downloader ")
#The Labels of Texts 
Label(Window, text="Youtube Video Converter \n By: Mahmoud Ahmed", fg="blue", font=("Calibri",15)).grid(sticky=N,padx=15,row=0)
Label(Window, text="Please enter the url of the Video u want to download it : ", font=("Calibri",12)).grid(sticky=N,row=1,pady=15)
Label(Window, text="Notice Any Downloading will be in the same file with this tool.", fg="orange", font=("Calibri",10)).grid(sticky=N,padx=15,row=8)

#my_progress = ttk.Progressbar(Window,length=130, mode='determinate').grid(row= 9, pady=20)


notif = Label(Window,font=("Calibri",12))
notif.grid(sticky=N,pady=1,row=6)
#Variables
url = StringVar()
#The empty label for URL
Entry(Window,width=50,textvariable=url).grid(sticky=N,row=2)
#The Button
Button(Window,width=20,text="Download",font=("Calibri",12),command=download).grid(sticky=N,row=4,pady=15)
Button(Window,width=20,text="Merge",font=("Calibri",12),command=Merge).grid(sticky=N,row=5,pady=15)
#Button(Window,width=20,text="Info",font=("Calibri",12),command=download).grid(sticky=N,row=4,pady=15)

Window.mainloop()