Yet another blog for JBKempf - VideoLAN

VLC and GPU decoding on linux aka Re: Welcome to the Thicket

JBK — Sun, 31 Jan 2010 10:22:00 +0100

Mike Melanson from FFmpeg and Adobe made a great post on hardware decoding APIs, named Welcome to the Thicket.

Once again, it is quite well written, and features an awesome graph:

Path chosen in VLC.

As you might know, VLC 1.1 is quite closer and we have worked quite a bit on the various GPU accelerations.

Windows

On Windows, everything is simple, we use DxVA2.

Linux

On Linux, as you can see the mess on the graph.

VLC has had patches for VDPAU and VAAPI.

We have now decided to only support VAAPI in the upstream source of VLC, and allow VDPAU through the VDPAU-VAAPI wrapper.

So far, it works fine with nVidia cards and some Intel ones.

VLC 1.0.5 et 1.1

JBK — Sat, 30 Jan 2010 02:50:00 +0100

Disclaimer: Vous retrouverez cet article co-écrit par moi, sur le site de PCinpact.

VLC 1.0.5

Estampillée 1.0.5, la nouvelle version de VLC est presque prête, puisque les sources sont déjà publiées. Les binaires vont suivre.

Cette nouvelle version est principalement intéressante pour les utilisateurs de Windows, puisqu’elle change de compilateur et met à jour les codecs embarqués.

En effet, toutes les versions depuis la 0.9.0, et notamment l’actuelle 1.0.3 (50 millions de téléchargements), ont été compilées avec la version 4.2 du compilateur gcc. L’introduction de la compilation avec gcc 4.4.2 devrait améliorer les performances générales, sans modifier de façon importante le code.

La mise à jour des librairies de codecs devrait apporter un gain supplémentaire de performance, notamment pour le décodage H.264. Enfin, de nombreuses corrections mineures ont été ajoutées durant le développement des versions 1.0.4 et 1.0.5 ainsi que de nombreuses traductions.

La dernière version avant la 1.1.0 ?

La prochaine version majeure après la 1.0.x sera la 1.1.0, nommée "The Luggage".

Le gel des ajouts de fonctionnalités pour la 1.1 devrait arriver vendredi prochain (5 février) et sera suivi par une « Technology Preview » très rapidement.

Que peut-on attendre de cette version ?

Réécriture du cœur vidéo

Probablement la partie la moins visible et la partie la plus importante de cette version, la réécriture de la partie qui gère les sorties vidéos et de la plupart des sorties vidéos permettra de partir sur de meilleures bases et d’ajouter des fonctionnalités essentielles pour la suite (1.2). Il faut noter que les sorties vidéos sous linux ont été réécrites à partir de zéro pour utiliser XCB à la place de xlib.

Support du décodage en GPU sous Windows

Sous Windows Vista et 7, comme nous en avons déjà parlé, les cartes graphiques supportant le décodage matériel devraient être utilisables depuis VLC, en utilisant DxVA2, pour H.264 et VC-1 (le mpeg-2 attendra probablement la version suivante). Toutes les cartes graphiques ne seront pas équivalentes et certains fabricants devraient être favorisés.

Nouveaux codecs, formats et protocoles

En vrac, les sous-titres des Blu-Ray et DVB HD, l’Atrac1, les playlists .zpl et .wpl, les fichiers des DVD-Audios (.aob) sont les principaux nouveaux formats supportés pour cette version. Des améliorations pour les fichiers m2ts et les formats des sous-titres sont aussi au rendez-vous.

Extensions

Une plate-forme d’extensions à base de scripts en lua sera disponible. Elle permettra, par exemple, de chercher des infos sur imdb, last.fm ou wikipedia, de télécharger les paroles, les tablatures ou des sous-titres sans quitter VLC. Ces scripts utilisateurs permettront d’aller chercher des données sur le net et/ou de contrôler VLC. Cette plate-forme est amenée à évoluer par la suite.

Amaigrissement

VLC 1.1 a vu de nombreux modules se faire supprimer (25 au dernier total) afin de réduire la quantité de code. Mais VLC a aussi vu sa consommation de mémoire diminuer ainsi que le nombre de threads dormants. Enfin, les versions pour appareils embarqués (ARM) ont vu d’importants gains de performances, mais il manque encore des interfaces pour ces architectures, notamment Windows Mobile.

La version Windows verra aussi le support Midi et le support CDDB rejoindre le catalogue 1.1, comme les autres architectures.

Merci à PCINpact

videolan.org stats for 2009: 90 million visits

JBK — Thu, 07 Jan 2010 23:00:00 +0100

2009, a transition year for VideoLAN

As I was saying in my presentation at the VideoLAN Dev Days 2009, 2009 was an important year for VideoLAN:

VideoLAN has become an non-profit organization
VideoLAN Dev Days (end of ‘08) helped to structure and take decisions
VLC 1.0.0 was tagged and released
DVBlast and VLMC were started
Acceleration of development, and communication around VLC and VideoLAN
Lots of ideas for the future were discussed.

Statistics and Website

One of the question we have the most is: How many users VLC has?. The answer is quite difficult to get, and we’ll rediscuss about it later.

However, there are trends that are easy to measure, and Google Trends is not the only option here.

videolan.org

One of the important way to measure the VLC popularity is to check the audience of videolan.org Website and its increase.

videolan.org numbers for 2009

In 2009:

VideoLAN has seen over 90 million visits on its website,
from 68million different IPs.
Pages view are around 480million pages.
Best month was december, with 9,25 million visits.
0 advertisement.
and is hosted on a single machine

Compared to 2008, this is an increase of 50%, since we had 60 million visits in 2008!

Operating Systems changes

Comparing December 2009 to 2008, our traffic is split like this:

Windows: 79,3% (from 81,4%)
- Windows 7: 17%
- Windows Vista: 16.6% (from 21%)
- Windows XP: 43,6% (from 57,2%)
- Windows 2000: 0,5% (from 1.1%)
- Windows 9x/Me: 0.3% (from 0.8%)
Mac OS X: 12,4% (from 10.8%)
Linux: 4.1% from 5.2%

And the rest…

Conclusion: nothing surprising here, and we see that 7 is already ahead of Vista… We were right to drop Win9x support :D

Browsers changes

Comparing December 2009 to 2008, our traffic is split like this:

Firefox: 42,8% (from 45,3%)
Internet Explorer: 33,9% (from 39%)
- IE6: 7.8% (from 14%)
- IE7: 7.8% (from 23,4%)
- IE8: 17.7% (from 0.7%)
Safari: 8.3% (from 8.9%)
Opera: 3.1% (from 3.2%)
Chrome: 6.5% (from 0.7%)

Conclusion: well, here, seeing Firefox loosing 3% in one year (in fact 2% in December alone) seemed weird, while Google Chrome is quite strong. I can’t say I am much surprised though.

VideoLAN is on Twitter

JBK — Wed, 02 Dec 2009 15:20:00 +0100

You should follow us on Twitter: http://twitter.com/videolan :D

VLC 1.0.3 is out!

JBK — Sun, 01 Nov 2009 15:40:00 +0100

Again? A release? Why ?

Instead of enumerating the features that VLC 1.0.3 brings you, let’s talk about why we had to do yet another release.

Speeding the development

With the 1.0.x branch, we decided that we would speed up the release cycle for minor versions, for a few reasons:

we didn’t want major bugs to stay around for too long,
we find it easier to track regressions,
we can fix crashes and potential security issues in a better timely fashion.

That doesn’t mean we were careless about the quality of older releases, it means that now we care MORE about user feedback and quality. This is unlikely to change…

Therefore, since 1.0.0 has been out, we have had:

1.0.1, 3 weeks after 1.0.0.
1.0.2, 8 weeks after 1.0.1.
1.0.3, 1 month after 1.0.2.

1.0.3 is important for Windows users

On Windows, VLC up to 1.0.2 used a way to scale the video that seems to be unsupported by the lastest drivers for Windows 7 (and now affects some Vista drivers too, because they backported the improvements…) and therefore the quality of the video was very bad and pixelated. VLC 1.0.3 fixes that.

Moreover, since VLC has now earned the logo for Windows 7 compatibility, we had to fix this huge bug. :D

I hope you understand our point and have fun with it.

VLC: CDDB on Windows!

JBK — Tue, 27 Oct 2009 09:28:00 +0100

CD-Audio

Audio-CD have usually two main ways to get the meta-data associated with the tracks:

embedded CD-Text information
online, with CDDB protocol, using FreedDB

VLC and Audio-CD

VLC has had 2 main Audio-CD modules, named CDDA and CDDAX, one using libcdio, the other not.

On windows, because of the difficulty to get libcdio, we use CDDA. But CDDA didn’t have CD-Text support. And libcddb didn’t work for us, at all.

So, on Windows, it used to be no CD-text, no CDDB…

Part one: VLC 1.0.0

VLC 1.0.0 has seen the addition of CD-Text for the CDDA module, and Windows version got it.

Part two: VLC 1.1.0

VLC 1.1.0 will see the addition of the CDDB support for VLC for Windows, since the fixes for libcddb and regex have just been done, tested and pushed by your servant on the main tree of VLC!

Yeah!

Conclusion

While VLC 0.9.x on WIndows didn’t had much to get information from CDs on Windows, VLC 1.1.x will have both CD-Text and CDDB to get informations from your Audio-CDs.

Of course, VLC isn’t the best for audio, but improving can’t hurt, can it?

VideoLAN and April

JBK — Sat, 24 Oct 2009 03:25:00 +0200

This is a short post topic about the VideoLAN association.

What is April ?

Pioneer of free software in France, April has been since 1996 a major player in the democratization and the spread of Free Software and open standards to the general public, professionals and institutions in the French-speaking world. In the digital era that is ours, it also aims to inform the public on the dangers of an exclusive appropriation of information an knowledge by private interests. The association is made up of individuals, companies, associations and organizations from various backgrounds who share the values of freedom.

VideoLAN and April

As of today, the VideoLAN association (or non-profit organization) is now a full member of the April association.

We have worked together quite a few times, and you might have seen the April’s campaigns on videolan.org, but we weren’t officially a member.

However, now that VideoLAN has a clean association and status, we were able to formalize this relationship.

Let’s hope it will be for the best.

Meet me in SF bay area soon

JBK — Mon, 19 Oct 2009 09:41:00 +0200

Hello fellow readers and VideoLAN fans,

This is a very short post to tell you that I will be around San Francisco / Bay Area for a few days at the end of the month.

So, if you need / want to see me or need to discuss VideoLAN matters, please contact me as soon as possible.

VLC and Windows 7 Logo

JBK — Sat, 10 Oct 2009 11:07:00 +0200

Compatible with Windows 7

The new operating system from Microsoft Windows 7 will be out this month.

As every time with Windows, there is a new Logo program for certification. As opposed to Vista, where they were 5 or 6 different logos, there is just one logo for everyone.

VLC 1.0.2 has been tested against the testing suite and was considered as "Compatible with Windows 7". This just mean that VLC conforms to the specifications and tests from Microsoft. It is supposed to check for common issues to minimize the number of crashes, hangs, and reboots and is compliant with Windows 7 64-bit.
VLC also install and uninstall in the correct way on Windows 7.

Of course, this should be transparent for all users, but it will matter for people upgrading older install of Windows to Windows 7. This also shows the quality that can be managed in open source community.

Works with Windows Vista

At the same time, VLC also got the "Works with Windows VIsta" Logo. I am not sure it is really of any interest now. :D

VLC issues on Windows 7

However, be careful, VLC still has issues on Windows 7, because of many broken drivers, made by major hardware makers. It can show pixizelated outputs when rescaling. Please change the video output to OpenGL and restart VLC as a work-around.

VLC 64bit running on Windows 7 64bits. 1st!

JBK — Fri, 04 Sep 2009 10:13:00 +0200

64 bits and Windows

64 bits VLC is a "hype" topic those days in our community.

On Windows, we couldn’t have a 64bits native version, because of lack of correct compiler (No, Microsoft Visual doesn’t fit in correct compiler section.

Fortunately, the mingw-w64 hackers are making a new one, and they ROCK. Huge thanks to NightStrike and ktietz!

VLC Win64

So, I have been working a bit on it. And two days ago:

Voilà :D

Don’t expect something complete soon, but still

Snow Leopard is out! And why you will not have VLC 64bits right now...

JBK — Fri, 28 Aug 2009 10:59:00 +0200

Apple OS X 10.6 is out

If you have missed the news, then you are not on the same techy blogs than I am.

So, Apple new operating system Mac OS X.6, named Snow Leopard is out, and it improves a lot the speed, and ports most of its application to 64bits, but doesn’t introduce any important new feature. Learn more about it !

VLC and 64bits

Do you really need 64bits for a video application? I seriously doubt it. But well, you might want/need it in the future.

Linux

VLC 64bits runs on 64bits linux since a long time, and I use it a lot. No majors problems since Linux is cleverly engineered.

Windows

VLC runs on Windows 64 as a Win32 application, but we haven’t finished the port to Win64, especially because of external libraries issues. It will come eventually.

Mac OS X

Since the WWDC ‘08, we know we have to remove all Carbon code, and we have mostly done it.

Leopard

VLC 64bits runs on 32bits Leopard without issues.

Snow Leopard

As one of our OSX developers says: I’ve you had asked me a month ago, I had said that everything is cool and VLC64 will be released the same day as Snow Leopard.

BUT

It doesn’t work now, because of a change in the Cocoa runtime. VLC stopped working in the last two seeds (the GM and the one prior to it).

Launching VLC results in crashes in a low level function called _NSBundleCreate, which is triggered by a whole bunch of Cocoa and IOKit methods. Basically every method of these frameworks results in a crash on Snow Leopard. This is strange, as exactly the same code runs nicely in 64bit on Leopard and prior seeds of Snow Leopard.

The problem is that VLC is not an ordinary NSApplication, but a plain C app, that loads a Cocoa plugin, which instantiates NSApp itself. Therefore, you cannot reproduce the crashes in normal Cocoa apps.

Conclusion

Apple, once again, breaks everything with a new OS, as it happens often, or when a new version of Xcode gets out. Last version of Xcode forced us to drop X.4 if we wanted to go 64bits and compatible with Snow Leopard. Seriously, I don’t get it.

I have applications that are running on the Win7 64bit setup that are Win98 games!

Anyway, to not finish on a bad note, Snow Leopard looks gorgeous!

VLC 1.0.0, 1.0.1, a backward look

JBK — Mon, 24 Aug 2009 01:22:00 +0200

VLC 1.0.0, 1,5 months ago

So, VLC 1.0.0 was released almost 7 weeks ago, at the time of this writing.

VLC 1.0.1, the bugfix version of 1.0.0, was released almost 4 weeks ago.

VLC 1.0.0 was downloaded around 13 million of time, during the 3 first weeks of the release, and that is a very high download rate. VLC 1.0.1 is around 13 million downloads too.

Was VLC 1.0.0 a success ?

Well, YES, because:

we had a lot of downloads,
many good reviews,
a lot of testing was done (more than 3 months between feature freeze and release!),
server hold still (even after the 1,3Million visitor in the first day),
no major regressions and issues.

But, we had a few issues that were important:

WMV could have no audio with low caching values,
mpeg2 videos could freeze the video after seek,
some flv videos were unseekable,
some VC1 video could crash the windows build.

That is why we released 1.0.1 quite soon after 1.0.0.

3 weeks between 1.0.0 and 1.0.1

Is that much?

Well, yes/no.

The first week after the release was totally focused on maintaining the servers running, answering the mails, and press (not much of those, fortunately).

Then, the second week was compilation of the main issues and tryout to fix most of them.

And then, you got your 3 weeks time, with the win32 codecs updates and setting up the release…

1.0.2 soon?

Well, as far as I see, except some SSA updates and v4l2 fixes, there is no rush to release…

If an important security issue arrives, then we will release a 1.0.2, but no roadmap is set yet.

Conclusion

As far as I am concerned, VLC 1.0.0 was a great success, let’s hope 1.1 will be as good!

VLC 1.0.0 goes above 3 million in less than 3 days!

JBK — Fri, 10 Jul 2009 00:43:00 +0200

UPDATE: After exactly 3 days, we are near 3.5Million

As you should know now, VLC 1.0.0 was out 61 hours ago (2 and a half day ago).

In order to not kill the servers, the download counting was deactivated. After reactivation and recounting, VLC 1.0.0 has been downloaded more than 3 million times in less than 3 days.

The VideoLAN website has seen more than 1,5 million unique visitors (and 0 advertisement) and around as many have downloaded through external websites directly linking to our repository.

On the first 48 hours, the counting was around 2,3 million.

Of course, this is a bit less than Mozilla Firefox, but still those are impressive numbers.

VLC 1.0.0 is out.

JBK — Tue, 07 Jul 2009 12:52:00 +0200

You know that this blog has been a bit quiet, because I had a lot of work to do.

This new version includes:

Live recording
Instant pausing and Frame-by-Frame support
Finer speed controls
New HD codecs (AES3, Dolby Digital Plus, TrueHD, Blu-Ray Linear PCM, Real Video 3.0 and 4.0, …)
New formats (Raw Dirac, M2TS, …) and majors improvements in many formats…
New Dirac encoder and MP3 fixed-point encoder
Video scaling in fullscreen
RTSP Trickplay support
Zipped file playback
Customizable toolbars
Easier encoding GUI in Qt interface
Better integration in Gtk environments
MTP devices on linux
AirTunes streaming
New skin for skins2 interface

Have fun!

Meet me at OpenVideoConference in NYC

JBK — Thu, 18 Jun 2009 18:34:00 +0200

Hello people,

I am going to the Open Video Conference, this week-end, in NYC: Open Video Conference .

So if you are in New York, and want to meet someone from the VideoLAN team, don’t hesitate to contact me!

VLC 1.0.0 RC 2

JBK — Thu, 28 May 2009 14:14:00 +0200

1.0.0 RC2

VLC 1.0.0 RC2 (Second Release Candidate) is out!

As all releases of VLC 1.0.0, it introduces:

many new codecs (True HD, DD+, AES3, RV40, SCTE-20, dirac…)
various playback core improvements (frame-by-frame, live-recording, instant pausing, etc…)
interface improvements
interface customization
better multi-channel audio support
better subtitles support
global hotkeys
better integration in GTK environments
better integration in KDE
and so many other bugfixes

Skins contest

And there is a Skins2 contest going on!

Please spread the news!

last.fm, libre.fm and scrobbling

JBK — Sat, 23 May 2009 11:09:00 +0200

Introduction

You may have followed the ongoing dispute around last.fm. You may also have no idea what scrobbling is (it is a way to post the music names what you listen to).

Some alternative exists.

VLC and last.fm

VLC since 0.9.x can scrobble on all platforms to last.fm database and website. Since it was cool addition, and VLC gets more and more audio support, this seemed a good idea and people liked it.

VLC and libre.fm

Some of you know the alternative to last.fm: libre.fm. It is a free software platform that gets your scrobble and will display them, like last.fm.

So far, it is VERY limited compared to last.fm

VLC 1.0.0 and libre.fm

VLC 1.0.0 is able to be configured to scrobble to any scrobbler (like libre.fm): Configuration of VLC to use libre.fm.

Position of VLC team

So far, the default stays on last.fm, but the possibility to scrobble to something else is here. We will see how the future goes.

Do as your heart tells you and share your music!

Want to include vlc in your Qt application?

JBK — Sat, 23 May 2009 10:36:00 +0200

Qt and VLC

Well, we have a very easy howto for you: libVLC in Qt .

This will output the video inside the widget that you want using QWidget::winId() method.

This has been tested on Linux and Windows, using libVLC 0.9.9.

Need

If you can't build your application easily, remember to install libvlc-dev or to use the SDK for windows from the .zip files of the releases!

Participate

Don't hesitate to complete this!

VLC and IDE

JBK — Thu, 30 Apr 2009 08:19:00 +0200

I receive many questions about using an IDE to build VLC.

Usually, the answer is VIM. But I will try to introduce something else today.

Needs

Yeah, VIM is TEH awesome, but sometimes we would like more. But usually, more is slow, incomplete and boring...

Would you want an editor with:

VIM syntax and command,
Completion that is faster than the one from Eclipse
Git inclusion
Doesn't eat all your RAM
Debuggueur and step-by-step+breakpoints integration like MSVC?

I guess so!

Believe it or not, there is a solution: QtCreator from Nokia/QtSoftware that I have tested to work with VLC.

Even if you don't think this will be useful for you, at least read in diagonale the following post.

Installation

Take QtCreator 1.1 (don't take older versions, they won't fit for VLC, or the VIM part will suck...)

   `apt-get install qtcreator` in Debian/Sid

Take Qt4.5.1 (I mean it, Qt 4.5.0 is buggy!)

Setup

General Setup

Run QtCreator and launch Tools->options
- Activate FakeVim and set ShiftWidth to 4
- Text Editor->Behaviour, set Tab size at 4
- Text Editor->Display, enable Text Wrapping and display right margin, and if you like Alexis' vim, Visualize whitespace
- Text Editor, change the colour schemes to match you old editor

Save options.

VLC Setup

For the example, I assume that you build your vlc in a "build" subdir of the source (as xtophe usually gives advice)

 * File->New
   Select 'Import of Makefile-based Project'
   -
   Project Name 'VLC'
   Location '/home/you/vlc' and Choose, Next
   -
   Let it process... It should take around 1minute
   Finish.

EXIT QtCreator... I MEAN it.

Setup Indexation

QtCreator will have done VLC.includes VLC.creator, VLC.files and a VLC.config in your vlc/ folder.

Overwrite the VLC.includes and the VLC.files with the one you can find:

Doing this will gain you some time. Those could be auto-generated one day, I guess...

Setup Build

Relaunch QtCreator

Select Projects (on the left) and select VLC on the list
Build Settings,
- Change Build directory to /home/you/vlc/build, using browse
Run Settings,
- Add a custom Executable with the blue '+'
- Name it VLC, browse to /home/you/vlc/build/vlc for Executable
- Put -Iqt in Arguments
Click on Edit on the left. You should see VLC with most useful files.

Build VLC and launch it.

In the Menu, Build and Build All, you should see the Compilation output on the bottom (or by clicking on the left build progressbar)
In the same menu, Build and Run it, and VLC will launch directly, outputting everything in the Application output.

Cool. But that was just a minimum...

Using it like VIM: Good!

Open modules/codec/avcodec/audio.c from the file browser and see... You are using VIM commands to control. You have Visual, Edit and all usual VIM modes!

Completion is triggered with Ctrl+Space and will give you a list. If there is no ambiguition, it is filled.
. and -> triggers the list of the members of the struct or the class by default.
After function completions, it will give the type of the arguments.

F2 will give you access to the function definition where your mouse is.

Debugging it: awesome!

You can put breakpoints in the margins near the line numbers. (Like in modules/gui/qt4/main_interface.cpp:100 and 108)

Now re run it using debug running.

It will stop at your breakpoint and you will have the function call lists (and line numbers) but also pointers values (like p_intf, and this in main_interface.cpp)

You can, of course Step In, Step Into and Step Out, resume or stop the code

More coolness:

Locate

Use the locate search box to find quick declarations: 'm vlc_object_act' will help you to go quickly to the method declaration, etc...

Git

Use the Git menu to checkout from within QtCreator.

Nota Bene

The indexing shouldn't be too long, but could be a bit longer the first time you launch the project!

Have fun!

Decoding video in VLC using VAAPI and nVidia

JBK — Sun, 19 Apr 2009 22:51:00 +0200

I know Phoronix people don't come around here, and that most people reading this blog don't care, but anyway...

GPU video decoding on Linux

On linux, decoding video using GPU means different standards:

Fortunately, we can use VDPAU (nVidia) as a backend to VAAPI. And there is a very nice library, named libva.

VLC and VAAPI

So far, most patches were done on MPlayer and FFmpeg, but here we go:

The sample is a M2TS with H.264 encoded at 32Mbps. Decoding is done without audio and subs and with a command line interface.

Performances

The perfs are quite nice, but they might be better. Why?

Because we don't output directly the video, we just take it back from the decoder, so we have a lot of memcpy, which explains why the decoding could be faster, but isn't...

Does this mean I can decode using GPU and then restream using VLC?

In theory, yes. Not tested yet :D