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• Title : FFmpeg and yt-dlp not working on Render.com deployment - Node.js YouTube video processing app

  23 mai, par minhquan lavo

  I'm building a video processing application that :

  


  

  1. Downloads YouTube videos using yt-dlp

  


  2. Processes these videos with FFmpeg for :

     

     • Cutting clips from the original video

     


     • Adding captions/subtitles to the clips

     


     


  


  


  I'm struggling with getting both tools to work on Render.com deployment. Here's my setup :

  


  Backend Stack :

  


  

  • Node.js

  


  • Express

  


  • FFmpeg-related packages :

    

    • @ffmpeg-installer/ffmpeg : ^1.1.0

    


    • @ffprobe-installer/ffprobe : ^2.1.2

    


    • ffmpeg-static : ^5.2.0

    


    • fluent-ffmpeg : ^2.1.2

    


    


  


  • yt-dlp (installed via pip in postinstall)

  


  


  What I've tried :

  


  

  1. Added FFmpeg installation in render.yaml :

  


  


  services:
  - type: web
    name: clipthat-backend
    env: node
    buildCommand: |
      apt-get update && apt-get install -y ffmpeg
      npm install
    startCommand: npm start


  


  

  2. Installing yt-dlp through npm postinstall :

  


  


  "scripts": {
    "postinstall": "pip install yt-dlp"
}


  


  The issues :

  


  

  1. FFmpeg commands fail on Render deployment :

     

     • Can't process video editing tasks (cutting clips)

     


     • Can't add captions to videos

     


     


  


  2. yt-dlp fails to download YouTube videos on deployment
Both tools work perfectly in my local development environment, but fail after deployment to Render.

  


  


  Questions :

  


  

  1. Has anyone successfully deployed a Node.js application using both FFmpeg and yt-dlp on Render.com for video processing ?

  


  2. Are there specific configurations needed for Python-based tools (like yt-dlp) on Render with Node.js apps ?

  


  3. Do I need to modify the build process to properly install Python and pip before the yt-dlp installation ?

  


  4. Is Render.com suitable for this kind of video processing application, or should I consider alternatives like DigitalOcean, AWS, etc.?

  


  


  Any help or guidance would be greatly appreciated ! Let me know if you need any additional information.

  


• ffmpeg : capture two screens simultaneously, save as two separate files

  9 janvier 2017, par wetjosh

  Is this possible ? Here is my working single file solution. How can I modify it to save two separate files instead ?

  ffmpeg \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 1 \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 2 \
  
  -pix_fmt yuv420p -r 30 -preset ultrafast -b:v 5000k -t 15 \
  
    -filter_complex \
  
      "nullsrc=size=2880x900 [background]; \
  
      [0:v] setpts=PTS-STARTPTS, scale=1440x900 [left]; \
  
      [1:v] setpts=PTS-STARTPTS, scale=1440x900 [right]; \
  
      [background][left] overlay=shortest=1 [background+left]; \
  
      [background+left][right] overlay=shortest=1:x=1440 [left+right]" \
  
    -map [left+right] out.mov

  I’ve tried removing the filter complex. I’ve tried adding two output files. I’ve tried various combinations of mapping. The following is the closest I’ve gotten to making it work. It creates two files, but both contain only the second stream (-i 2).

  ffmpeg \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 1 \
  
  -f avfoundation -pix_fmt uyvy422 -s 1440x900 -i 2 \
  
  -pix_fmt yuv420p -r 30 -preset ultrafast -b:v 5000k -t 15 out1.mov \
  
  -pix_fmt yuv420p -r 30 -preset ultrafast -b:v 5000k -t 15 out2.mov

• How can I save the downloaded and converted audios to a specific folder

  19 décembre 2022, par Retire Young

  I'm trying to download Videos from a specific playlist and converting it to a m4a file for further downloading. The process works perfectly but the files are being saved in the same folder where my Phyton script is located. I choose a specific Output Folder but the files don't appear there.
Any ways to save the files in the desired folder ?

  


  An error message reads as follows : "input.mp4: No such file or directory"
In my Code block, I censored the playlist link and the user name on the path. Just imagine a working playlist link instead. Thanks in advance !

  


  import os
import subprocess


  


  Replace with the URL of the YouTube playlist

  


  playlist_url = "PLAYLISTLINK"

  


  Set the output directory for the downloaded files

  


  output_dir = "/Users/USER/Documents/VideoBot/Output"

  


  Use youtube-dl to download the latest video in the playlist

  


  subprocess.run(["youtube-dl", "-f", "bestaudio[ext=m4a]", "--playlist-start", "1", "--playlist-end", "1", playlist_url])

  


  Extract the audio from the downloaded video using ffmpeg

  


  subprocess.run(["ffmpeg", "-i", "input.mp4", "-vn", "-acodec", "copy", "output.m4a"])

  


  Move the extracted audio file to the output directory

  


  os.rename("output.m4a", os.path.join(output_dir, "output.m4a"))