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• Python video player using ffpyplayer.player with audio repeated cracking at end of clip

  18 janvier 2021, par sunyaer

  I am using the codes below to do a video player. For video clips cut using this command : "ffmpeg -i PrideAndPrejudice.mp4 -ss 00:50:31 -t 00:03:30 OutPutPP.mp4", there is audio crack that keeps repeating a couple of times when the picture stops at the end of the video. I suspect there may be some issues with the codes of QTimer, but as I am quite new to Python and ffmpeg, and can't figure out what exactly the problem is, not to mention how to fix it. Your help would be greatly appreciated.

  


      self.timer = QTimer()
    self.timer.setInterval(50)
    self.timer.start()
    self.timer.timeout.connect(self.showFrame)


  


  This is the whole codes :

  


   from ffpyplayer.player import MediaPlayer
 import sys
 from PyQt5.QtWidgets import *
 from PyQt5.QtGui import QPixmap, QImage, QImageReader
 from PyQt5.QtCore import QTimer

class MyApp(QWidget):
    def __init__(self, name, parent=None):
        super(MyApp, self).__init__(parent)
        self.label = QLabel()
        self.qimg = QImage()
        self.val = ''

        self.player = MediaPlayer("PrideAndPrejudice005030.mp4")
        self.timer = QTimer()
        self.timer.setInterval(50)
        self.timer.start()
        self.timer.timeout.connect(self.showFrame)

        layout = QVBoxLayout()
        layout.addWidget(self.label)
        self.setLayout(layout)
        self.setWindowTitle(name)

        # self.showFullScreen()

    def showFrame(self):
        frame, self.val = self.player.get_frame()
        if frame is not None:
            img, t = frame
            self.qimg = QImage(bytes(img.to_bytearray()[0]), img.get_size()[0], img.get_size()[1],
                               QImage.Format_RGB888)
            self.label.setPixmap(QPixmap.fromImage(self.qimg))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    t = MyApp(sys.argv[0])
    t.show()
    sys.exit(app.exec_())


  


• 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()



  


• Recording multiple cameras using gstreamer/ffmpeg, encoding problems

  11 février 2021, par kepitto

  I have an incoming UDP-MJPEG-Stream of 4-10 Kameras and I need to live-store these in a way to be able to store atleast a few days of data, preferably up to a week atleast. I'm testing the setup with 1 camera right now and have following issues :

  


  If I were to save the incoming stream via matroska without transcoding it I receive : 171,9GB/day, which is way too much if I want to run this with 10 cameras.
  
So I've looked a lot into different codecs and compared a few (x264, x265, vp8, vp9) and also checked the CPU usage and realized this won't be managable without Hardware Acceleration if I want to run 10 cameras on an embedded device. My target device will probably have H.264 and maybe VP8 encoding/decoding

  


  Which leads me to my first questions, how capable are hardware encoder/decoder ? Will I be able to transcode 10 camera-streams at the same time (raspberry pi h.264 hardware accel for example ; i'll use a more capable device for the final implementation) ? Maybe store chunks and transcode the files instead of stream ?

  


  gst-launch-1.0 udpsrc port=52000 do-timestamp=true caps=image/jpeg,framerate=30/1 blocksize=4096 ! queue ! jpegparse ! queue ! jpegdec ! queue ! videoconvert ! x265enc ! queue ! h265parse ! queue ! matroskamux ! filesink location=x.mkv  


  


  This pipeline works, but the file is 20% bigger than the same file with x264enc (without parse before mux-parsing shouldn't make a difference though).
  
As a comparison on ffmpeg I get a file which is 11 times smaller in size with following command :

  


  ffmpeg -framerate 30 -i udp -pix_fmt yuv420p -vcodec libx265 out.mkv


  


  Also vp8/vp9 encoding doesn't work on gstreamer at all. I use the same pipeline as above with vp8enc/vp9enc instead. I get videos which are too short and with a lot of random frames. Maybe performanceissue ?

  


  On ffmpeg I can capture and transcode to vp8, but vp9 doesn't work either. (Frames drop too low followed by errors, most likely performance issue)

  


  Does live-transcoding make sense and is it achievable on an embedded device ?