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MediaSPIP Simple : futur thème graphique par défaut ?
26 septembre 2013, par
Mis à jour : Octobre 2013
Langue : français
Type : Video
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GetID3 - Bloc informations de fichiers
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Mis à jour : Mai 2013
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GetID3 - Boutons supplémentaires
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Mis à jour : Avril 2013
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Urgent Help Needed : FFmpeg Integration in .NET MAUI for Android [closed]
15 juin 2024, par Billy VanegasI'm currently facing a significant challenge with integrating FFmpeg into my .NET MAUI project for Android. While everything works smoothly on Windows with Visual Studio 2022, I'm having a hard time replicating this on the Android platform. Despite exploring various NuGet packages like FFMpegCore, which appear to be wrappers around FFmpeg but don't include FFmpeg itself, I'm still at a loss.


I've tried following the instructions for integrating ffmpeg-kit for Android, but I keep running into issues, resulting in repeated failures and growing confusion. It feels like there is no straightforward way to seamlessly incorporate FFmpeg into a .NET MAUI project that works consistently across both iOS and Android.


The Problem :


I need to convert MP3 files to WAV format using FFmpeg on the Android platform within a .NET MAUI project. I’m using the FFMpegCore library and have downloaded the FFmpeg binaries from the official FFmpeg website.


However, when attempting to use these binaries on an Android emulator, I encounter a permission denied error in the working directory :
/data/user/0/com.companyname.projectname/files/ffmpeg

Here’s the code snippet where the issue occurs :


await FFMpegArguments
 .FromFileInput(mp3Path)
 .OutputToFile(wavPath, true, options => options
 .WithAudioCodec("pcm_s16le")
 .WithAudioSamplingRate(44100)
 .WithAudioBitrate(320000)
 )
 .ProcessAsynchronously();
 


Additional Details :


I've updated AndroidManifest.xml with permissions, but the issue persists.


I've created a method ConvertMp3ToWav to handle the conversion.
I also have a method ExtractFFmpegBinaries to manage FFmpeg binaries extraction, but it seems the permission issue might be tied to how these binaries are accessed or executed.


AndroidManifest.xml :


<?xml version="1.0" encoding="utf-8"?>
<manifest>
 <application></application>
 
 
 
 
</manifest>


Method ConvertMp3ToWav :


private async Task ConvertMp3ToWav(string mp3Path, string wavPath)
{
 try
 {
 // Check directory and create if not exists
 var directory = Path.GetDirectoryName(wavPath);
 if (!Directory.Exists(directory))
 Directory.CreateDirectory(directory!);

 // Check if WAV file exists
 if (!File.Exists(wavPath))
 Console.WriteLine($"File not found {wavPath}, creating empty file.");
 using var fs = new FileStream(wavPath, FileMode.CreateNew);

 // Check if MP3 file exists
 if (!File.Exists(mp3Path))
 Console.WriteLine($"File not found {mp3Path}");

 // Extract FFmpeg binaries
 string? ffmpegBinaryPath = await ExtractFFmpegBinaries(Platform.AppContext);

 // Configure FFmpeg options
 FFMpegCore.GlobalFFOptions.Configure(new FFOptions { BinaryFolder = Path.GetDirectoryName(ffmpegBinaryPath!)! });

 // Convert MP3 to WAV
 await FFMpegArguments
 .FromFileInput(mp3Path)
 .OutputToFile(wavPath, true, options => options
 .WithAudioCodec("pcm_s16le")
 .WithAudioSamplingRate(44100)
 .WithAudioBitrate(320000)
 )
 .ProcessAsynchronously();
 }
 catch (Exception ex)
 {
 Console.WriteLine($"An error occurred during the conversion process: {ex.Message}");
 throw;
 }
}


Method ExtractFFmpegBinaries :


private async Task<string> ExtractFFmpegBinaries(Context context)
{
 var architectureFolder = "x86"; // Adjust according to device architecture
 var ffmpegBinaryName = "ffmpeg"; 
 var ffmpegBinaryPath = Path.Combine(context.FilesDir!.AbsolutePath, ffmpegBinaryName);
 var tempFFMpegFileName = Path.Combine(FileSystem.AppDataDirectory, ffmpegBinaryName);

 if (!File.Exists(ffmpegBinaryPath))
 {
 try
 {
 var assetPath = $"Libs/{architectureFolder}/{ffmpegBinaryName}";
 using var assetStream = context.Assets!.Open(assetPath);
 
 await using var tempFFMpegFile = File.OpenWrite(tempFFMpegFileName);
 await assetStream.CopyToAsync(tempFFMpegFile);

 // Adjust permissions for FFmpeg binary
 Java.Lang.Runtime.GetRuntime()!.Exec($"chmod 755 {tempFFMpegFileName}");
 }
 catch (Exception ex)
 {
 Console.WriteLine($"An error occurred while extracting FFmpeg binaries: {ex.Message}");
 throw;
 }
 }
 else
 {
 Console.WriteLine($"FFmpeg binaries already extracted to: {ffmpegBinaryPath}");
 }

 return tempFFMpegFileName!;
}
</string>

What I Need :


I urgently need guidance on how to correctly integrate and use FFmpeg in my .NET MAUI project for Android. Specifically :


How to properly set up and configure FFmpeg binaries for use on Android within a .NET MAUI project.
How to resolve the permission denied issue when attempting to execute FFmpeg binaries.


Any advice, solutions, or workarounds would be greatly appreciated as this is a critical part of my project and I'm running out of time to resolve it.


Thank you in advance for your help !


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-
Vagrant provision fails to execute the next script without an obvious reason why
14 juin 2016, par JakeTheSnakeI’ve created/co-opted several bash scripts to provision my guest Ubuntu 14.04 OS ; the one giving me trouble right now is installing ffmpeg. When the script finishes, vagrant simply does nothing save for sending SSH keep-alives.
Host OS : Windows 7 x64
The last output before the infinitely repeating keep-alives is :
INSTALL libavutil/sha.h
INSTALL libavutil/sha512.h
INSTALL libavutil/stereo3d.h
INSTALL libavutil/threadmessage.h
INSTALL libavutil/time.h
INSTALL libavutil/timecode.h
INSTALL libavutil/timestamp.h
INSTALL libavutil/tree.h
INSTALL libavutil/twofish.h
INSTALL libavutil/version.h
INSTALL libavutil/xtea.h
INSTALL libavutil/tea.h
INSTALL libavutil/lzo.h
INSTALL libavutil/avconfig.h
INSTALL libavutil/ffversion.h
DEBUG ssh: stdout: INSTALL libavutil/libavutil.pc
DEBUG ssh: stdout: Done
DEBUG ssh: Sending SSH keep-alive...
DEBUG ssh: Sending SSH keep-alive...
DEBUG ssh: Sending SSH keep-alive...Here are the relevant scripts :
Vagrantfile
# -*- mode: ruby -*-
# vi: set ft=ruby :
# All Vagrant configuration is done below. The "2" in Vagrant.configure
# configures the configuration version (we support older styles for
# backwards compatibility). Please don't change it unless you know what
# you're doing.
Vagrant.configure(2) do |config|
# The most common configuration options are documented and commented below.
# For a complete reference, please see the online documentation at
# https://docs.vagrantup.com.
# Every Vagrant development environment requires a box. You can search for
# boxes at https://atlas.hashicorp.com/search.
config.vm.box = 'ubuntu/trusty64'
config.vm.hostname = 'dev'
config.ssh.forward_agent = true
config.ssh.pty = true
# Create a private network, which allows host-only access to the machine
# using a specific IP.
config.vm.network :private_network, type: :dhcp, auto_config: false
# Create a public network, which generally matched to bridged network.
# Bridged networks make the machine appear as another physical device on
# your network.
config.vm.network :public_network,
ip: '192.168.11.14',
bridge: 'Realtek PCIe GBE Family Controller'
# Share an additional folder to the guest VM. The first argument is
# the path on the host to the actual folder. The second argument is
# the path on the guest to mount the folder. And the optional third
# argument is a set of non-required options.
#
# Do not share root directory of vagrant
# config.vm.synced_folder '.', '/vagrant', disabled: true
# Share ruby repository directories
config.vm.synced_folder '.',
'/home/vagrant/apps',
nfs: true,
mount_options: [
'nfsvers=3',
'vers=3',
'actimeo=1',
'rsize=8192',
'wsize=8192',
'timeo=14',
:nolock,
:udp,
:intr,
:user,
:auto,
:exec,
:rw
]
# Provider-specific configuration so you can fine-tune various
# backing providers for Vagrant. These expose provider-specific options.
# Example for VirtualBox:
#
config.vm.provider :virtualbox do |vb|
# Display the VirtualBox GUI when booting the machine
vb.gui = true
# Use VBoxManage to customize the VM.
vb.name = 'Ubuntu'
vb.cpus = 4
vb.memory = 2048
vb.customize ['modifyvm', :id, '--vram', 64]
vb.customize ['modifyvm', :id, '--audio', :dsound]
vb.customize ['modifyvm', :id, '--audiocontroller', :ac97]
vb.customize ['modifyvm', :id, '--clipboard', :bidirectional]
end
# Provisioning
config.vm.provision :shell, path: './provisioning/user/install-apps.sh',
privileged: false, name: 'Applications'
config.vm.provision :shell, path: './provisioning/user/install-rvm.sh',
args: 'stable', privileged: false, name: 'RVM'
config.vm.provision :shell, path: './provisioning/user/install-ruby.sh',
args: '2.3.1', privileged: false, name: 'Ruby'
config.vm.provision :shell, path: './provisioning/user/install-ruby-gems.sh',
privileged: false, name: 'Ruby Gems'
config.vm.provision :shell, path: './provisioning/root/install-nginx.sh',
args: '1.9.9', name: 'Nginx'
config.vm.provision :chef_solo do |chef|
# chef.version = '12.10.40'
# Paths to your cookbooks (on the host)
chef.cookbooks_path = ['cookbooks']
# Add chef recipes
chef.add_recipe 'apt'
chef.add_recipe 'git' # Is required for NPM
chef.add_recipe 'sqlite'
chef.add_recipe 'mysql'
chef.add_recipe 'nodejs'
chef.add_recipe 'memcached'
chef.add_recipe 'imagemagick'
chef.add_recipe 'optipng'
chef.add_recipe 'sublime-text'
chef.add_recipe 'tomcat'
end
endinstall-apps.sh
#!/usr/bin/env bash
echo Turning off console beeps...
grep '^set bell-style none' /etc/inputrc || echo 'set bell-style none' >> /etc/inputrc
echo Installing languages
sudo apt-get -y update
sudo locale-gen en_US en_US.UTF-8
sudo dpkg-reconfigure locales
echo Installing essential apps
sudo apt-get -y install build-essential curl yasm
echo Installing desktop apps
sudo apt-get -y install ubuntu-desktop
hash ffmpeg 2>/dev/null || {
# Build ffmpeg
echo Installing ffmpeg
sudo apt-get -y install autoconf automake libass-dev libfreetype6-dev \
libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev \
libxcb-xfixes0-dev pkg-config texinfo zlib1g-dev libx264-dev libmp3lame-dev libopus-dev
mkdir ~/ffmpeg_sources
cd ~/ffmpeg_sources
wget http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
tar xjvf ffmpeg-snapshot.tar.bz2
cd ffmpeg
PATH="$HOME/bin:$PATH" PKG_CONFIG_PATH="$HOME/ffmpeg_build/lib/pkgconfig" ./configure \
--prefix="$HOME/ffmpeg_build" \
--pkg-config-flags="--static" \
--extra-cflags="-I$HOME/ffmpeg_build/include" \
--extra-ldflags="-L$HOME/ffmpeg_build/lib" \
--bindir="$HOME/bin" \
--enable-gpl \
--enable-libass \
--enable-libfreetype \
--enable-libmp3lame \
--enable-libopus \
--enable-libtheora \
--enable-libvorbis \
--enable-libx264 \
--enable-nonfree
PATH="$HOME/bin:$PATH" make
make install
make distclean
hash -r
source ~/.profile
}
echo Done
exit 0install-rvm.sh
#!/usr/bin/env bash
echo Installing RVM gpg key
gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 --trust-model always
echo Installing RVM
\curl -sSL https://get.rvm.io | bash -s $1
exit 0I won’t include the other scripts for the sake of brevity. When logging into vagrant with the gui nothing seems out of the ordinary, and ffmpeg is available...but nothing else is provisioned. No RVM, no Nginx, nothing.
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