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• Best way to have 2 youtube-dl input with ffmpeg and php

  8 janvier 2021, par Baraque Obahamas

  I'm trying to find the best way to combine a youtube-dl link in mp4 format with another youtube-dl link in m4a format to get an mp4 file through ffmpeg & php and to have an output in stdout in order to download the file directly.

  


  With only one file to convert to another format, I managed to do it easily, for example from m4a to mp3 :

  


  $cmd = "youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4 | ffmpeg -i - -f mp3 -ab 192k -";


  


  But with 2 inputs, it doesn't work :

  


  $cmd = "cat <(youtube-dl -f bestvideo[ext=mp4] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) <(youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) > ffmpeg -i - -movflags frag_keyframe+empty_moov+faststart -frag_duration 3600 -c:v copy -c:a copy -f mp4 -";


  


  In this case I get a "said into stderr : "sh : 1 : Syntax error : "(" unexpected")" error.

  


  I guess there must be a better way to do it.
I notice another problem is that on the ffmpeg command there is only one input "-i -". Now there are 2 inputs, there should be I guess "pipe:3" in addition, but so far my tests have not been conclusive.

  


  Full code :

  


  <?php
header('Content-Description: File Transfer');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header("Content-Disposition: attachment; filename=\"ok.mp4\"");
header("Content-Type: application/octet-stream");

$cmd = "cat <(youtube-dl -f bestvideo[ext=mp4] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) <(youtube-dl -f bestaudio[ext=m4a] --no-part --no-cache-dir --no-warnings --no-progress -o - https://www.youtube.com/watch?v=6Dh-RL__uN4) > ffmpeg -i - -movflags frag_keyframe+empty_moov+faststart -frag_duration 3600 -c:v copy -c:a copy -f mp4 -";
$cmd = passthru($cmd, $status);


  


• Error converting youtube video to gif using npm

  15 décembre 2015, par user5663488

  I have installed ffmpeg and node.js. Trying to convert youtube video to gif images. In command prompt I have used "youtube-to-gif -u https://www.youtube.com/watch?v=NqxSgp385N0 -b 30 -d 5" command. Its showing error "Cannot find ffmpeg". Please suggest.

  This image displays the error while using the above command

• FFMPEG detect position of text and hide/delogo

  9 novembre 2016, par Ates Özen

  I’ve tried a lot of ways to do that. Is it possible to detect the position of a text in a video and hide/watermark it with delogo in ffmpeg ?

  You can see something like what i want in this video at 30th second :
  https://www.youtube.com/watch?v=HxexmWk2Yh0

  In my situation the text is not rectangled.