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• How to access an image file using FFmpeg in a React Native (Android) project ?

  9 septembre 2021, par Asp1re

  I made an app where I want to create a video from a png using FFmpeg in React Native but I'm stuck at my image file path part. FFmpeg uses the file system of the android so I can't really use paths like ./assets/img.png. I need an absolute path - can't use require('img.png')

  


  Here is my FFmpeg code :

  


  ffmpeg -loop 1 -i img.png -t 10 -r 1 -c:v libx264 output.mp4


  


  How can I reach the res or assets folder on an android ? Is there a way to bundle it into my app so on my android I can access it through an absolute path somehow ?

  


  I searched a lot of questions similar to this and most of the answers are the use of require('img.png') but this doesn't work for me because the way FFmpeg works. Is there a way to access my image file with FFmpeg in a React Native Android project ?

  


• Access pixel data of each frame of a video in Ruby

  23 janvier 2019, par Robin

  I want to be able to read/stream a video with Ruby, on Mac, and be able to get access to the pixel data for each frame.

  What I’ve tried

  • https://github.com/streamio/streamio-ffmpeg

    It’s good at splitting the video into frames, but I don’t know how to get access to the pixel data without saving each frame as an image first (or if it’s possible at all).

  ---

  require 'streamio-ffmpeg'
  
  movie = FFMPEG::Movie.new("flakes.mp4")
  
  
  
  movie.screenshot("screenshots/screenshot_%d.jpg", { custom: %w(-vf crop=60:60:10:10), vframes: (movie.duration).to_i, frame_rate: movie.frame_rate/24 }, { validate: false })`

  ---

  • https://github.com/wedesoft/hornetseye-ffmpeg

    This seemed to have so much potential, but I don’t think it’s maintained anymore, and it’s not meant to be used on MacOS really, so I’m having issues installing it there (headers not found and such, and no way to configure it afaik).

  Any idea what tool or method I could use for this use case ?

• How to fix 'ffmpeg server returned 403 forbidden (access denied) ?

  1er février, par peppah

  I'm writing a website to convert youtube videos using NodeJS. I am using a package to convert them (horizon-youtube-mp3). The package works, however, I'm having problems converting. Whenever I try to convert a youtube link, it will return 'server returned 403 forbidden access'. 
This error happens in 95% of the links. Some links actually work and convert correctly, but only a few.

  



  I tried running the script on 3 different computers running 3 different OS's. My VPS, my laptop and my home PC. I looked on the web but couldn't find anything useful.

  



  So yeah, I completely suck since I really don't understand why one video would convert, and the other won't. Even if the region of the video is the same.

  



  Any help would be highly appreciated !