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• Powershell script for youtube-dl

  29 mai 2022, par Ricardo

  I'm trying to write a script to simplify input of variables to youtube-dl.

  


  Here is my ffmpeg command (replace items in brackets) :

  


  ./ffmpeg -ss ['starting time', ex: 05:49] -i $(./youtube-dl -f 22 --get-url ['video youtube url']) -t ['clip duration in seconds'] -c:v copy -c:a copy ['file result name'].mp4


  


  Here is my PowerShell command :

  


  cls

$url = Read-Host -Prompt "Enter the Youtube Video URL"

$start = Read-Host -Prompt "Enter the video start time (H:MM:SS)"

$end = Read-Host -Prompt "Enter the clip duration in seconds"

$name = Read-Host -Prompt "Enter the video name"

./ffmpeg -ss $start -i $(./youtube-dl -f 22 --get-url $url) -t $end -c:v copy -c:a copy $name.mp4



  


  And this is the result I receive from Powershell :

  


  

  


• extract audio with youtube-dl on windows

  12 mars 2017, par FlyingNimbus

  I want to extract audio from a video downloaded with youtube-dl on windows. I got youtube-dl working, but am unable to extract the audio. This problem is caused due to not having the correct audio codes installed. When i try to extract audio it tells me the following :

  ’WARNING : unable to obtain file audio codes with ffprobe’

  youtube-dl man sais the following :
   x -extract-audio convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)

  How do I install ffprobe or ffmpeg ? Do I install this on windows, or do I install this as a python extension ? I have no idea, can someone point me in the right direction ?

  OS : windows 7

• Pipe OpenCV and PyAudio to ffmpeg streaming youtube rtmp from python

  22 août 2021, par a0910115172

  How can I pipe openCV and PyAudio to ffmpeg streaming youtube rtmp from python.
The error message shows as following :
No such filter : 'pipe:1'
pipe:1 : Invalid argument

  


  Here is my code :

  


  Import module

  


  import cv2
import subprocess
import pyaudio


  


  Audio

  


  p = pyaudio.PyAudio()
info = p.get_host_api_info_by_index(0)
numdevices = info.get('deviceCount')
for i in range(0, numdevices):
        if (p.get_device_info_by_host_api_device_index(0, i).get('maxInputChannels')) > 0:
            print("Input Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0, i).get('name'))

CHUNK = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 44100

stream = p.open(format=FORMAT,
                channels=CHANNELS,
                rate=RATE,
                input=True,
                frames_per_buffer=CHUNK)

# Stream Audio data here
# data = stream.read(CHUNK)


  


  Video

  


  rtmp = r'rtmp://a.rtmp.youtube.com/live2/key'

cap = cv2.VideoCapture(0)
width = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
height = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
fps = 30



  


  command param here

  


  command = ['ffmpeg',
           '-y',
           '-f', 'rawvideo',
           '-pixel_format', 'bgr24',
           '-video_size', "{}x{}".format(width, height),
           '-framerate', str(fps),
           '-i', 'pipe:0',
           '-re',
           '-f', 'lavfi',
           '-i', 'pipe:1',
           '-c:v', 'libx264',
           '-c:a', 'aac',
           '-vf', 'format=yuv420p',
           '-f', 'flv',
           rtmp]


  


  Create subprocess to ffmpeg command

  


  pipe = subprocess.Popen(command, shell=False, stdin=subprocess.PIPE
)
while cap.isOpened():
    success, frame = cap.read()
    if success:
        if cv2.waitKey(1) & 0xFF == ord('q'):
            break
        pipe.stdin.write(frame.tostring())
        pipe.stdin.write(stream.read(CHUNK))


  


  Audio Stop

  


  stream.stop_stream()
stream.close()
p.terminate()


  


  Video Stop

  


  cap.release()
pipe.terminate()


  


  Thanks