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• How to get ffmpeg to run on Heroku ? (libpulsecommon-15.99.so error)

  10 octobre 2023, par Fabien Snauwaert

  I'm trying to run ffmpeg on Heroku using an Aptfile (for use in a Flask app where I want to be able to perform audio conversions using pydub, which works fine locally.)

  


  # Aptfile
libsndfile1
libsndfile1-dev
ffmpeg
libvpx7
libpulse0
pulseaudio


  


  I've got these buildpacks :

  


  # Output from `heroku buildpacks`
1. heroku-community/apt
2. heroku/python


  


  And I keep getting this error with a simple heroku run 'ffmpeg --version' :

  


  


  ffmpeg : error while loading shared libraries : libpulsecommon-15.99.so : cannot open shared object file : No such file or directory

  


  


  This is on Heroku-22, but I was getting the same error on Heroku-20.

  


  Now I've spent hours on this and I'm still confused as to...

  


  

  1. What is libpulsecommon-15.99.so even part of ?

  


  2. Is it a case of the library not being installed ? Or being installed but not found ?

  


  


  

  • ls $HOME/.apt/usr/lib/x86_64-linux-gnu | grep libpulse (where $HOME is /app/) gives :

  


  


  libpulse-simple.so.0
libpulse-simple.so.0.1.1
libpulse.so.0
libpulse.so.0.24.1


  


  

  • echo $LD_LIBRARY_PATH returns /app/.heroku/vendor/lib:/app/.heroku/python/lib:/app/.apt/usr/lib/x86_64-linux-gnu:/app/.apt/usr/lib/i386-linux-gnu:/app/.apt/usr/lib:

  


  


  I'm lost and these are hours of my life I'm not going to get back 🤔😅

  


  ---

  


  I'm also wondering if there's much a point trying to get ffmpeg to work on Heroku this way : with the dependencies listed above (in the Aptfile), I'm already at 487 MB in slug size (out of a 300 MB soft limit, 500 MB hard limit), for a codebase under 1 MB.

  


  Any help welcome. I'll update the question as needed.

  


• How to add a watermark to the saved video with CameraX api in saving time

  14 novembre 2022, par Nino Sand

  I am using the CameraX api approach to record the videos and saving them as explained in the documents : https://developer.android.com/training/camerax/video-capture
  
I tried with ffmpeg-android-java but clearly it needs to process the saved video not adding to the saved frames in real time.
  
  
Now, I want to add a watermark to all saved videos in easy and not costly way and without the need to reprocess the video ?
  
Also, if there is no way, what the best and fastest approach to process the video to only add a watermark ?

  


• yt-dlp get audio only link -> ffmpeg piped audio -> ffplay

  5 juin 2022, par james28909

  Ok, i have a perl script that i am trying to figure out why it is throwing an io error. First i use yt-dlg to get the link of only the audio - this works as expected and i can navigate to the link in a browser just fine. then i open a ffmpeg pipe in perl and then try to read the output from ffmpeg and eventually, if i can get this working, i will process the ffmpeg output then send to a named pipe.

  


  the problem comes from the ffmpeg when i am processing the data from the link obtained with yt-dlp, and i think it has to do with my while loop but i am not sure what. i have a named pipe called "input". i summon ffmpeg with the following :

  


  #/usr/bin/perl
use strict;
use warnings;

my $file = /path/to/named/pipe
my $read_len = 1024;

open (my $SOURCE_AUDIO, '-|', "ffmpeg -y -i \'$link\' -map 0 -c copy -ac 2 -f opus -ar 48000 pipe:1");
binmode($SOURCE_AUDIO);

# process the ffmpeg output.i have a function i want to implement here, 
# but i need to be able to parse ffmpeg output in set read lengths

while( read($SOURCE_AUDIO, my $buf, $read_len)){
print $file $buf;
};


  


  but before the end of the playback, somewhere around the end of the audio stream ffmpeg throws errors like this :

  


  [tls @ 0x5d0de00] Error in the pull function..2kbits/s speed=1.21x
[tls @ 0x5d0de00] IO error: Connection reset by peer
[tls @ 0x5d0de00] The specified session has been invalidated for some reason.
    Last message repeated 1 times
https://rr3---sn-(truncated): Input/output error
size=    1021kB time=00:01:18.36 bitrate= 106.7kbits/s speed=1.21x
video:0kB audio:1012kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.808163%


  


  i am not sure what is causing it to end early, or what is causing it to be terminated. i can download the file and re-encode it (if needed) and then play it flawlessly with ffplay, but i cannot, for the life of me, parse ffmpeg output and write it to a named pipe. any help sure would be appreciated. thanks

  


  P.S. i am using latest updated windows 11 and WSL's built in perl :

  


  This is perl 5, version 30, subversion 0 (v5.30.0) built for x86_64-linux-gnu-thread-multi
(with 50 registered patches, see perl -V for more detail)

Copyright 1987-2019, Larry Wall

Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using "man perl" or "perldoc perl".  If you have access to the
Internet, point your browser at http://www.perl.org/, the Perl Home Page.