VideoLAN Wiki - User contributions [en]

OPW Summer 2014

2014-03-19T09:28:38Z

Felix abecassis: /* Assembly optimizations in VLC */

This wiki page covers the work of the [[VideoLAN]] project as a mentoring organization for [http://gnome.org/opw/ Outreach Program for Women], in order to improve {{VLC}}.

=== VLC media player ===

{{VLC}} is a cross-platform multimedia player, encoder and streamer application. It is one of the most successful [http://www.videolan.org/videolan/ open-source projects without any professional structure] underneath.

{{VLC}} is downloaded at an approximate monthly rate of 40 millions from the main website and that's not including third-party distributions (like Linux, BSD, Android or iOS)!

You can find more information on [http://en.wikipedia.org/wiki/VLC_media_player VLC on Wikipedia] or on this [[Main Page|wiki]].

=== Outreach Program for Women ===

If selected and developed, OPW projects for VLC will be included in later releases.

All projects are covered by the GPL (v2+) or LGPL (v2.1+) licenses depending on the module.

=== VLC Ideas categories ===

''''' You should really read this'''''

This page is split in three lists of ideas:

#The ''main ideas'' are what seem to be ''key projects'' for VLC and should be more ''thrilling'' than the other ones; we have assigned a potential mentor to each of these.
#The other ideas are less detailed but could be good ideas too.
#[[Mini Projects]] are short-span projects which can be given as Qualification tasks or extended to be a full project.

'''Original good ideas will be valued'''. We don't want to impose anything. This is Free and Open Source software.

If you don't want to apply for OPW but want other ideas to develop on, check the [[Mini Projects]] page!

And on the IRC channel ''#videolan'' on the ''Freenode Network'', you can have even more ideas.

== Getting started ==

=== Compile VLC ===
This may sound trivial, but it's harder than many expect. VLC's compilation chain is different for every operating system. It doesn't really use the default toolchains on Windows or OS X, but a simple *nix like ./configure && make doesn't really do the trick either. We have plenty of information available on this wiki and we will happily provide help on our IRC channel.

=== Provide a small patch ===
To demonstrate your skills, share a small patch with us. This will let you become familiar with [[Git]], in case you don't know it already and our process on [[Sending Patches VLC|merging patches]].

=== Let's get in touch ===
We have 3 major communication channels at VideoLAN. Our [https://mailman.videolan.org/mailman/listinfo mailing-lists] to discuss patches and further development related topics. Furthermore, we have our [http://forum.videolan.org web forums] for end-user support. This means 2 things: 1) people using VLC media player on any operating system 2) people using libvlc or the VLC web plugin in their own applications or installations. Finally, there is our IRC channel ''#videolan'' on the ''Freenode'' network. It's open to any kind of discussion. Usage issues, questions how to compile VLC, getting to know the fellow developers, etc.

== Key ideas for VLC ==

=== CC EIA-708 Closed Caption support ===
Following up with the recent developments in the US, we need full support for [http://en.wikipedia.org/wiki/CEA-708 CEA-708].

We will extend our [http://www.youtube.com/watch?v=1WhMEWIb2S4 support for EIA-608 in VLC 2.1], so a base is laid, which needs to be expanded and improved.

Requires good C experience.

''Proposed mentor: [[User:J-b|jb]]''

=== Timed Text TTML support ===
Based on the W3C specification, we need support for [http://www.w3.org/TR/ttaf1-dfxp/ Timed Text Markup Language] to display widely formatted text in time with video or / and audio. If time allows, this project should be expanded to add support for SMPTE-TT's additional elements.

Requires good C experience and a feeling for web technologies.

''Proposed mentor: [[User:J-b|jb]]''

=== Chrome OS' NaCl support for VLC's core ===
We want to add support for Google's Chrome OS. As a base, libvlccore, VLC's cross-platform compatibility core needs to be adapted to add support for Chrome OS' NaCl runtime environment. A base was laid internally last fall, but it is far from being complete. As time allows, this project should be expanded to add video and audio output modules for this platform as well as a basic, HTML-driven UI to test.

Requires strong C knowledge, good networking knowledge and a basic understanding of Native Client applications on Chrome OS.

''Proposed Mentor: [[User:Fkuehne|feepk]]''

=== UPNP DLNA Server and Client ===

Test and fix service discovery module for UPNP/DLNA shares done by software (mediatomb, xbmc, etc) and hardware implementations.

Provide DLNA plugin for DLNA server compliant with opensource (xbmc, djmount, etc) and proprietary (PS3, xbox360, etc) DLNA clients. Some of the work is already done by previous SoC students.

The plugin must be smart enough to provide "presets" for known DLNA media clients with limited features (PS3 or XBOX360 for starters) which require additional quirks or hacks or items to be transcoded or streamed.

Requires some VLC knowledge as the project will involve using Media Library and transcoding with VLC API.

''Proposed mentors: thresh, mirsal''

=== Assembly optimizations in VLC ===

If you are fond of writing ASM and you are fluent in MMX/SSE2/SSE4, there are many interesting things in VLC to speed up.

* Profiling VLC
* video filters ASM speedups (see modules/video_filter/blend.c)
* audio filters ASM speedups (see modules/audio_filter/equalizer.c)
* Porting other ASM video filters to VLC.

This project needs some good ASM knowledge and good C experience.

*Stuff to read: http://www.agner.org/optimize/

''Proposed mentor: [[User:J-b|jb]], flx42''

=== Advanced Audio Filters ===

We are looking for a skilled '''audiophile''' that knows a lot about audio theory and practice to work on new audio filters.

Notably:
* SRS WoW like or other 3D effects;
* channels mixing, notably upmixing, like Prologic-II;
* tracks mixing, and transitions;
* scriptable new audio filters in lua and enable users to create whatever audio filtering function they want in a Lua script;
* LADSPA or other libraries integration.

This project needs some good audio knowledge and good C experience.

''Qualification task'': port any audio filter from MPlayer

''Proposed mentor: [[User:Geal|geal]]''

=== VLC Test Suite ===

This project aims at making automatic tests to improve VLC quality.

*Write a series of tests for vlc-internal
*Integrate a framework for automated plugins testing with the automake build system
*Automate the different codec playback/mux/etc tests
*Automate the subtitles tests
*Write tests for the different bindings: Mac OS X Framework/Python Bindings... etc.

This project is a code project, require good knowledge of C

''Proposed mentor: Rémi''

=== VLC Personal Cloud Project 2.0 ===

The personal cloud project is a simple project to allow people to play their media files anywhere in the world.

Through the http interface of VLC, a user can:

*list the medias from the Media Library,
*play those medias,
*those medias get transcoded and streamed in:
**Flash
**Silverlight
**iPhone format
**Android format
**html5
**A VLC webplugin

A good example of the aim is http://www.vodobox.c.la/

This project has to work on the configuration and NAT traversal.

This projects needs knowledge in HTML and JS; it might require C coding.

''Proposed mentor: [[User:J-b|jb]]''

=== Playlist improvements ===

We need to reinforce the media library capabilities and its integration with external metadata sources, notably for TV shows.

''Proposed mentor: ??''

=== AirPlay streaming ===

We need to be able to stream everything to your Google TV, Apple TV or raspberrypi powered shairport service. Airport is an non-open protocol that allows wireless streaming of audio, video, multimedia to supported devices.

The tasks would consist of:
* Understanding how AirPlay works, try with any device if available.
* Configure a test setup using raspberrypi or your own computer or any TV device if available, play with couple of available players who support AirPlay. This is just to get a feel of what it is you will be trying to implement for vlc-android.
* Study couple of opensource implementations like shairport
* Run/test/deploy VLC on simulator or android device
* Implement an AirPlay aout that would stream audio to your AirPlay supported device (shairport with rpi/computer or Apple TV or Google TV)
* Test with couple of android devices if available, ask mentors and community to test, report bugs, suggestions
* Study how video works, vout for vlc works, if have time implement video streaming as well.

''Proposed mentor: bhaisaab/rohityadav''

=== VLC Sync Play across devices ===
By leveraging zeroconf and rtsp make possible to decode in sync in multiple devices a video stored in one.
Tasks:
* Implement a simple protocol for discovery and announce
* Implement the discovery system
* At least one of the following
** Provide a UI for Qt (Windows / Linux)
** Provide a UI for Android
** Provide a UI for OS X
''Proposed mentor: lu_zero''

=== Native Emotion integration ===
Emotion is the Evas multimedia widget. It currently uses a number of backends and has a partial integration with VLC.
Tasks:
* Improve the integration to be on par with the gstreamer one
* Write an example player using EmotionVLC
''Proposed mentor: lu_zero''

=== XML fast and small implementation ===

The goal of this project is to write a new XML backend, based on a smaller library than the full libxml2. Speed would be nice, but code size matters here. Beware: we need to have a stream-XML based API, not a DOM one.

This project requires good knowledge of C.

''Proposed mentor: [[User:etix|etix]]''

=== Port VLC's NPAPI web plugin to PPAPI ===
We need to support the PPAPI interfaces this summer to keep playback support within Google Chrome, since they will drop for the existing NPAPI architecture.

Requires good C or/and C++ knowledge and a basic understanding of web browser internals. The ability to test on more than one platform would be a very strong plus.

''Proposed Mentor: [[User:Fkuehne|feepk]]''

== Other Ideas for VLC ==

=== WTV support ===
Wtv format support
''Proposed mentor: ???''

=== DVD audio support ===
Very difficult project for Audio fans
''Proposed mentor: [[User:J-b|jb]]''

=== Device synchronisation===
Sync your mp3 player with the media library
''Proposed mentor: ???''

=== HD DVD support ===
Very difficult project for someone having the right hardware
''Proposed mentor: [[User:J-b|jb]]''

=== Multi-Angle DVD support ===
We need multi-angle DVD support
''Proposed mentor: Meuuh''

=== VLM UI for the Mac OS X interface ===
Implement an easy-to-use, yet customizable and complete UI for the VideoLAN Media Manager, which allows VLC to stream multiple unicast, multicast and Video-on-Demand streams within a single instance.
You will need a Mac running OS X 10.6 or later and Cocoa programming experience. A basic understanding of media streams is definitely preferable.
Note that this task is too small for an entire summer and should be combined with another topic.
''Proposed mentor: [[User:Fkuehne|feepk]]''

=== Improve messages display ===
When VLC has a problem opening or playing files it shows a messages window on top of the player with the error. This can be annoying if the screen is being controlled remotely as the user has to manually dismiss the message. There are various ways this could be improved:
#Update UI so that messages window will auto-dismiss after x seconds unless it is clicked on (this could be optional behaviour). Clicking on the window would cancel the countdown. If the window was selected from the menu, it would not auto-dismiss.
#Mac OS: Display messages using notification system (if available). Clicking on the notification would open the messages window.
Suggested by : Confused Vorlon.
''Proposed mentor: [[User:Fkuehne|feepk]]''

=== BD-J / BD-Live VLC integration ===

This is a project to work on Bly-Ray menus and interactivity improvements.

This project requires a correct C and Java knowledge

Proposed mentor: hpi and [[User:J-b|j-b]].

=== Support for HTTP Dynamic Streaming (F4M) ===

We need to be able to read Flash Media Manifests (also known as F4M) according to this spec.

Proposed mentor: fyhuel

=== Porting Audio Filters ===

We are looking for a skilled '''audiophile''' that knows a lot about audio theory and practice:
* to port open source algorithm for audio filters to VLC.

This project needs some good audio knowledge and good C experience.

''Proposed mentor: [[User:Geal|geal]]''

AndroidCompile

2013-10-17T09:17:11Z

Felix abecassis: /* Package in Eclipse [optional] */

This page is an introduction to the compilation of '''VLC for Android''' on Linux.

==Eclipse, SDK and NDK installation==

=== Requirements ===
* You '''MUST''' be on Linux (or OSX if you know what you are doing), and a recent one.
* You '''MUST''' have installed: ''apache-ant'' (or ''ant''), ''autoconf'', ''automake'', ''autopoint'', ''cmake'', ''gawk'' (or ''nawk''), ''gcc'', ''g++'', ''libtool'', ''m4'', ''patch'', ''pkg-config'', ''ragel'', ''subversion'', and very up-to-date versions of those tools.
** Special note: Additionally, if you are compiling for an Android-x86 device, you should install ''yasm''.
** <span style="color: #ff0000">'''64-bit users'''</span>: You must install these 32-bit libs as specified here: [[AndroidCompile#Can.27t_run_aapt_or_adb_on_Linux_64-bit]]
** Optional: ''7z'' (for SDK package generation)
* You '''MUST''' install: ''git''.

===Android SDK===
# Create a working directory ''android''.
# Go to [http://developer.android.com/sdk/index.html Android SDK page] and download the latest SDK for linux.
# Decompress into ''android'' folder.
# Run ''tools/android'' (from the command line you can also run: "tools/android update sdk -u -t platform,platform-tool,extra")
# In the tool, install '''"SDK Platform Android 4.3, API 18"''', and follow the instructions.

You can have [http://developer.android.com/sdk/installing.html more details], if needed.

===Android NDK===
# Check that the SDK installation is correct.
# Go to the [http://developer.android.com/sdk/ndk/index.html Android NDK page] and download the '''NDK r9''' for Linux.
# Decompress it into the ''android'' folder, next to your android-sdk-linux folder.

===Eclipse===
As used by your distribution, install Eclipse with your package manager:

apt-get install eclipse (debian)
yum install eclipse (Fedora)
pacman -S eclipse (Arch)
emerge -av eclipse-sdk (Gentoo)
...

And run it, at least once, and then quit eclipse.

'''Note:''' On Debian-based distributions it is better to download Eclipse indigo builds from the official website: http://www.eclipse.org/downloads/, otherwise it can lead to an error when importing the ADT plugin (see following).

====ADT====
The '''ADT''' plugin is required to compile on Android.

#Go to [http://developer.android.com/sdk/eclipse-adt.html#installing ADT page].
#Start Eclipse, then select Help > Install New Software....
#Add the "ADT Plugin" repository with https://dl-ssl.google.com/android/eclipse/ as '''URL'''
#Validate and select the checkbox next to Developer Tools and click Next, Next, Finish.
#Restart Eclipse.
#Go to ''Menu'' > ''Window'' > ''Preferences...'' and then ''Android'' from the left pane.
#Point the SDK Location in to your downloaded SDK directory.
#Ok, and quit Eclipse.

See [http://developer.android.com/sdk/eclipse-adt.html#troubleshooting extra information here].

== Environment setup ==
Set $ANDROID_SDK to point to your Android SDK directory

export ANDROID_SDK=/path/to/android-sdk

Set $ANDROID_NDK to point to your Android NDK directory

export ANDROID_NDK=/path/to/android-ndk

Add some useful binaries to your $PATH

export PATH=$PATH:$ANDROID_SDK/platform-tools:$ANDROID_SDK/tools

=== Devices ===

You need to export the ABI for your device. <code>armeabi-v7a</code> is for devices with ARMv7 or above (regardless of [[wikipedia:ARM_architecture#Advanced_SIMD_.28NEON.29|NEON]]), any other ARM device uses <code>armeabi</code>, x86/Intel devices use <code>x86</code>.
export ANDROID_ABI=armeabi-v7a
or
export ANDROID_ABI=armeabi

For a build that will run on x86 Android devices (e.g. certain Intel Android smartphones):
export ANDROID_ABI=x86

For a build that will run on MIPS devices (i.e. Ainol Novo tablets):
export ANDROID_ABI=mips

The following flags (NEON, FPU, ARMV6) are relevant only for the ''armeabi'' ABI:

If you plan to use an armeabi device that does not support FPU, you need a build without FPU
export NO_FPU=1

If you plan to use an ARMv5 armeabi device (read: Android Emulator), you need a build without ARMv6
export NO_ARMV6=1

==== Examples====
* For a normal (2012 consumer phone or tablet), like Cortex-A8 or Cortex-A9
export ANDROID_ABI=armeabi-v7a
* For a Tegra2 device
export ANDROID_ABI=armeabi-v7a
* For an ARMv6 device
export ANDROID_ABI=armeabi
* For an ARMv6 device without FPU
export ANDROID_ABI=armeabi
export NO_FPU=1
* For an ARMv5 device or the emulator
export ANDROID_ABI=armeabi
export NO_ARMV6=1
* For a x86 device (e.g. Android-x86, Google TV, Logitech TV, etc)
export ANDROID_ABI=x86
* For a MIPS device (i.e. Ainol Novo tablets):
export ANDROID_ABI=mips

''Those exports must be set at all times, notably for the contribs and the configure.''

== Building ==
=== Get VLC Source ===
Clone the source from the VLC git!

In your ''android'' folder, run:

git clone git://git.videolan.org/vlc-ports/android.git

==== Compile ====
'''Read''' compile.sh first, as it contains some very useful and important information. Then run it:
sh compile.sh

'''Note:''' At this point, you will get an autogenerated debug apk in the bin/ folder, signed with a debug key.

In order to build a non-debug package:
sh compile.sh release

'''Note:''' At this point, you will get an unsigned release apk in the bin/ folder, which you will have to sign and [http://developer.android.com/tools/help/zipalign.html zipalign].

==== Package in Eclipse [optional] ====
# In Eclipse, create a ''new Android Project from existing source'' by importing from the ''vlc-android'' path.
# Import the three projects from the ''java-libs'' folder.
# If you still have some errors, try the following: go to the properties of the VLC project, in ''Java Build Path'' choose ''Add External JARs'' and select ''/path/to/android-sdk/extras/android/support/v4/android-support-v4.jar''.
# Export unsigned/signed apk.

'''Note:''' Building against JDK6 is recommended for optimal compatibility (Set ''Java Compiler Compliance'' to 1.6).

=== Run ===
Run it and enjoy!

== Debugging ==
Here are some helpful links if you wish to debug VLC on Android:
* [http://developer.android.com/guide/developing/debugging/ddms.html DDMS]
* [http://developer.android.com/guide/developing/tools/logcat.html Logcat]

===Native debugging===
If you run VLC Android and you get a crash that looks something like this:
<pre>
I/DEBUG ( 958): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 958): Build fingerprint: 'MOTO/MBTCA/sesame/XT300:2.1-update1/SESLA_U3_01.71.0/110110:user/release-keys'
I/DEBUG ( 958): pid: 1733, tid: 1733 >>> org.videolan.vlc <<<
I/DEBUG ( 958): signal 11 (SIGSEGV), fault addr 4237be3c
I/DEBUG ( 958): r0 423640a0 r1 7ece77ac r2 42bccdac r3 4237be38
I/DEBUG ( 958): r4 00000000 r5 42bccdac r6 002ed088 r7 002ed018
I/DEBUG ( 958): r8 7ece78e8 r9 2bafa844 10 0000000e fp 7ece794c
I/DEBUG ( 958): ip 00002ba0 sp 7ece7784 lr 423652e4 pc 4237be3c cpsr 60000010
I/DEBUG ( 958): #00 pc 0037be3c /data/data/org.videolan.vlc/lib/libvlcjni.so
I/DEBUG ( 958): #01 lr 423652e4 /data/data/org.videolan.vlc/lib/libvlcjni.so
</pre>

You have a '''native crash'''. To debug it, you need to have compiled VLC as above and installed it on your device. Once your compiled VLC build is on your device, you can find the '''backtrace''' as follows:

# Make sure you are in the directory that you checked out VLC-Android in.
# cd vlc-android
# $ANDROID_NDK/ndk-gdb --verbose --force --start
At this point, lots of stuff will appear:
<pre>
Android NDK installation path: /opt/android-ndk-r8c
Using default adb command: /opt/android-sdk-linux_x86/platform-tools/adb
ADB version found: Android Debug Bridge version 1.0.29
Using ADB flags:
Using auto-detected project path: .
Found package name: org.videolan.vlc
...bunch of stuff skipped...
GNU gdb (GDB) 7.3.1-gg2
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-linux-gnu --target=arm-linux-android".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Remote debugging from host 0.0.0.0
...bunch of stuff skipped...
libthread_db:td_ta_new: Victory: We can debug theads!
warning: Breakpoint address adjusted from 0x400deaa5 to 0x400deaa4.
0x40107a40 in epoll_wait () from /media/data/vlc_android/vlc-android/obj/local/armeabi/libc.so
(gdb)
</pre>
<ol start="4">
<li>At this point, type in "continue" and press Enter.</li>
<li>Perform the actions you did to make it crash. It will spit out something like this:</li>
</ol>
<pre>
Program received signal SIGSEGV, Segmentation fault.
0x401120ae in ?? () from /media/data/vlc_android/vlc-android/obj/local/armeabi/libc.so
</pre>
<ol start="6">
<li>Now, just type in "'''bt full'''" (excluding the quotation marks) and press Enter. That is your backtrace that you should give to the developers when they ask for it (possibly on a [http://paste.kde.org/ pastebin], too).</li>
</ol>
<pre>
(gdb) bt full
#0 0x401120ae in ?? () from /media/data/vlc_android/vlc-android/obj/local/armeabi/libc.so
No symbol table info available.
#1 0x40107bd8 in abort () from /media/data/vlc_android/vlc-android/obj/local/armeabi/libc.so
No symbol table info available.
#2 0x40118e6a in __assert2 () from /media/data/vlc_android/vlc-android/obj/local/armeabi/libc.so
No symbol table info available.
#3 0x5e0cdfdc in var_SetChecked (p_this=0x40134b94, psz_name=0x5ea2fcb8 "rate", expected_type=80, val=...) at ../../src/misc/variables.c:711
i_ret = 0
p_var = <optimized out>
oldval = {i_int = 4742037487051810480, b_bool = 176, f_float = 2.27765068e+14, psz_string = 0x574f26b0 "X\270|B\001\001", p_address = 0x574f26b0,
p_object = 0x574f26b0, p_list = 0x574f26b0, i_time = 4742037487051810480, coords = {x = 1464805040, y = 1104091640}}
__func__ = "var_SetChecked"
p_priv = <optimized out>
#4 0x5e06dd9c in var_SetFloat (f=1.41421354, psz_name=0x5ea2fcb8 "rate____sample_backtrace", p_obj=0x0) at ../../include/vlc_variables.h:262
val = <optimized out>
#5 libvlc_media_player_set_rate (p_mi=0x0, rate=1.41421354) at ../../lib/media_player.c:1252
p_input_thread = <optimized out>
#6 0x5de7bd18 in Java_org_videolan_vlc_LibVLC_setRate (env=0x41cf0470, thiz=0x8ab00021, rate=1.41421354) at jni/libvlcjni.c:678
mp = 0x0
#7 0x4076de34 in ?? ()
No symbol table info available.
#8 0x4076de34 in ?? ()
No symbol table info available.
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
</pre>

== Troubleshooting ==
=== Outdated Awk ===
If you receive the error message while building:

Android NDK: Host 'awk' tool is outdated. Please define HOST_AWK to point to Gawk or Nawk !

The prebuilt version of Awk that comes with the Android NDK is outdated. Defining HOST_AWK in your environment does nothing as the system still tries to just the one that comes with the Android NDK. To get around this issue, simply rename or delete the Awk binary that comes with the Android NDK. For example to move it:

mv $ANDROID_NDK/prebuilt/linux-x86/bin/awk $ANDROID_NDK/prebuilt/linux-x86/bin/awk.old

=== Can't find Ant ===
If you're new to Ant, please be aware that some Linux distributions don't install it in the usual spot as with other programs. Try checking to see if the directory /usr/share/java/apache-ant/bin exists and add it to your path.

===Outdated autotools-dev===
If you get the following error message you may have have an outdated version of autotools-dev:
Invalid configuration `arm-linux-androideabi': system `androideabi' not recognized
You may first want to check if your distribution has any available updates for this package. Alternatively, you can manually update your config.guess and config.sub files from here: [http://git.savannah.gnu.org/gitweb/?p=config.git;a=tree]. These files are typically located in /usr/share/misc on Debian based distributions.

===autoreconf: automake failed with exit status: 1===
automake: warnings are treated as errors
configure.ac:41: warning: The 'AM_PROG_MKDIR_P' macro is deprecated, and will soon be removed.
configure.ac:41: You should use the Autoconf-provided 'AC_PROG_MKDIR_P' macro instead,
configure.ac:41: and use '$(MKDIR_P)' instead of '$(mkdir_p)'in your Makefile.am files.

If you are using Automake 1.13 or higher, you must remove -Werror from vlc/contrib/android/gnutls/configure.ac to continue. (First reported in [http://forum.videolan.org/viewtopic.php?f=35&t=108927])

===Can't run aapt or adb on Linux 64-bit===
You must install the 32-bit libraries of the following libraries, as the precompiled Google binaries depend on them: ''libc6'', ''libstdc++6'', and ''zlib''.

New versions of Debian and/or Ubuntu require you to install i386 versions of packages:
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install zlib1g:i386 libstdc++6:i386 libc6:i386

If you are under ''old versions'' of Ubuntu, install ia32-libs can help you solve this issue.
sudo apt-get install ia32-libs

==See also==
* [[Android Report bugs]] - Bug reporting guide for VLC-Android.

[[Category:Building]] [[Category:Android]]