[Buildroot] Help about gstreamer h264 in buildroot

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Hello,
I'm trying to play mp4 h264 video files on a RPi.
Attached there is the .config file.
When I try to play such a file I get this error:

Warning: "No decoder available for type 'video/x-h264, 
stream-format=(string)avc, alignment=(string)au, level=(string)4, 
profile=(string)main, 
codec_data=(buffer)014d4028ffe10016274d4028a9180f0044fcb8035010101b6c2b5ef7c04001000428de09c8, 
width=(int)1920, height=(int)1080, framerate=(fraction)25/1, 
pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true'."
Error: "Your GStreamer installation is missing a plug-in."

Anyway I selected (and checked with gst-inspect) the x264parse plugin 
(from bad- ones).
After a search on the web it seems I need also the gst-ffmpeg but this 
requires libavcodec which cannot compile:

libavcodec/arm/ac3dsp_armv6.S: Assembler messages:
libavcodec/arm/ac3dsp_armv6.S:40: Error: selected processor does not 
support ARM mode `movw r8,#0x1fe0'


I was working on a 2014.05-git-00366-gba25b12-dirty version.
I tried on a newer one (2014.08-git-00302-g712414c) but there is the 
same error.

What am I missing?

Thanks!
Marco


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[Buildroot] Help about gstreamer h264 in buildroot

[Thomas Petazzoni]

Dear Marco Trapanese,

On Sat, 14 Jun 2014 11:19:54 +0200, Marco Trapanese wrote:

> libavcodec/arm/ac3dsp_armv6.S: Assembler messages:
> libavcodec/arm/ac3dsp_armv6.S:40: Error: selected processor does not 
> support ARM mode `movw r8,#0x1fe0'
> 
> I was working on a 2014.05-git-00366-gba25b12-dirty version.
> I tried on a newer one (2014.08-git-00302-g712414c) but there is the 
> same error.

I tried building your configuration, and here it fails with a different
issue:

.obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::destroyNativeWindow(void*)':
qeglfshooks_pi.cpp:(.text+0x2c): undefined reference to `vc_dispmanx_update_start'
qeglfshooks_pi.cpp:(.text+0x38): undefined reference to `vc_dispmanx_element_remove'
qeglfshooks_pi.cpp:(.text+0x40): undefined reference to `vc_dispmanx_update_submit_sync'
.obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::platformDestroy()':
qeglfshooks_pi.cpp:(.text+0x90): undefined reference to `vc_dispmanx_display_close'
.obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::platformDisplay() const':
qeglfshooks_pi.cpp:(.text+0xa0): undefined reference to `vc_dispmanx_display_open'
.obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::createNativeWindow(QPlatformWindow*, QSize const&, QSurfaceFormat const&)':
qeglfshooks_pi.cpp:(.text+0x10c): undefined reference to `vc_dispmanx_update_start'
qeglfshooks_pi.cpp:(.text+0x15c): undefined reference to `vc_dispmanx_element_add'
qeglfshooks_pi.cpp:(.text+0x168): undefined reference to `vc_dispmanx_update_submit_sync'
collect2: error: ld returned 1 exit status

That's an issue with the RPi OpenGL implementation, I think we have had
a couple of similar failures in the autobuilders. Maxime, Yann, any
suggestion?

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Il 14/06/2014 14:14, Thomas Petazzoni ha scritto:
> I tried building your configuration, and here it fails with a 
> different issue:
>
> .obj/qeglfshooks_pi.o: In function 
> `QEglFSPiHooks::destroyNativeWindow(void*)': 
> qeglfshooks_pi.cpp:(.text+0x2c): undefined reference to 
> `vc_dispmanx_update_start' qeglfshooks_pi.cpp:(.text+0x38): undefined 
> reference to 

How is it possible?
Shouldn't the same configuration lead to the same output?


> That's an issue with the RPi OpenGL implementation, I think we have 
> had a couple of similar failures in the autobuilders. Maxime, Yann, 
> any suggestion? Thomas 


Well, given that this currently doesn't work in buildroot, is there 
another way to play an mp4/h264 video from Qt5?

Thanks!
Marco

[Buildroot] Help about gstreamer h264 in buildroot

[Thomas Petazzoni]

Dear Marco Trapanese,

On Sat, 14 Jun 2014 21:50:19 +0200, Marco Trapanese wrote:

> > .obj/qeglfshooks_pi.o: In function 
> > `QEglFSPiHooks::destroyNativeWindow(void*)': 
> > qeglfshooks_pi.cpp:(.text+0x2c): undefined reference to 
> > `vc_dispmanx_update_start' qeglfshooks_pi.cpp:(.text+0x38): undefined 
> > reference to 
> 
> How is it possible?
> Shouldn't the same configuration lead to the same output?

Two possibilities:

 1/ We're not using exactly the same Buildroot version, so that might
    affect the build.

 2/ Sometimes, the host environment has some impact on the build.
    Buildroot tries to avoid this as much as possible, but the
    cross-compilation is never fully guaranteed from being isolated of
    the host machine configuration.

> > That's an issue with the RPi OpenGL implementation, I think we have 
> > had a couple of similar failures in the autobuilders. Maxime, Yann, 
> > any suggestion? Thomas 
> 
> Well, given that this currently doesn't work in buildroot, is there 
> another way to play an mp4/h264 video from Qt5?

I think we should rather fix the problems :)

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Il 15/06/2014 00:34, Thomas Petazzoni ha scritto:
> Well, given that this currently doesn't work in buildroot, is there
> another way to play an mp4/h264 video from Qt5?
> I think we should rather fix the problems :)


Hi Thomas,
I appreciate a lot your efforts, anyway I have to ask you any news 
because Thursday I must show my project and if I can't play mp4 h264 
video with buildroot I have to rely on another distro.

Of course I don't request anything! It's just to know if it's easy 
enough to fix, otherwise I need to restart from scratch another time.

Thanks!
Marco

[Buildroot] Help about gstreamer h264 in buildroot

[Thomas Petazzoni]

Dear Marco Trapanese,

On Tue, 17 Jun 2014 14:54:58 +0200, Marco Trapanese wrote:

> I appreciate a lot your efforts, anyway I have to ask you any news 
> because Thursday I must show my project and if I can't play mp4 h264 
> video with buildroot I have to rely on another distro.
> 
> Of course I don't request anything! It's just to know if it's easy 
> enough to fix, otherwise I need to restart from scratch another time.

So far, I haven't been able to look further into the problem, and I
don't expect to be able to do so before your deadline on Thursday.

Hopefully, another Buildroot person can have a look and give you some
insight.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Il 14/06/2014 14:14, Thomas Petazzoni ha scritto:
> I tried building your configuration, and here it fails with a different
> issue:
>
> .obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::destroyNativeWindow(void*)':
> qeglfshooks_pi.cpp:(.text+0x2c): undefined reference to `vc_dispmanx_update_start'
> qeglfshooks_pi.cpp:(.text+0x38): undefined reference to `vc_dispmanx_element_remove'
> qeglfshooks_pi.cpp:(.text+0x40): undefined reference to `vc_dispmanx_update_submit_sync'
> .obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::platformDestroy()':
> qeglfshooks_pi.cpp:(.text+0x90): undefined reference to `vc_dispmanx_display_close'
> .obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::platformDisplay() const':
> qeglfshooks_pi.cpp:(.text+0xa0): undefined reference to `vc_dispmanx_display_open'
> .obj/qeglfshooks_pi.o: In function `QEglFSPiHooks::createNativeWindow(QPlatformWindow*, QSize const&, QSurfaceFormat const&)':
> qeglfshooks_pi.cpp:(.text+0x10c): undefined reference to `vc_dispmanx_update_start'
> qeglfshooks_pi.cpp:(.text+0x15c): undefined reference to `vc_dispmanx_element_add'
> qeglfshooks_pi.cpp:(.text+0x168): undefined reference to `vc_dispmanx_update_submit_sync'
> collect2: error: ld returned 1 exit status
>
> That's an issue with the RPi OpenGL implementation, I think we have had
> a couple of similar failures in the autobuilders. Maxime, Yann, any
> suggestion?



Hi Thomas, after fixing the gst-ffmpeg issue thanks to Arnout 
Vandecappelle, I'm still trying to compile buildroot and now I'm facing 
the problem you reported above.

Do you confirm this doesn't work?

I'm very confused how to skip around all those bugs in order to have a 
functional buildroot environment.

Marco

[Buildroot] Help about gstreamer h264 in buildroot

[Thomas Petazzoni]

Dear Marco Trapanese,

On Sat, 21 Jun 2014 13:04:14 +0200, Marco Trapanese wrote:

> Hi Thomas, after fixing the gst-ffmpeg issue thanks to Arnout 
> Vandecappelle, I'm still trying to compile buildroot and now I'm facing 
> the problem you reported above.

Weird that I didn't fall into the issue you reported originally,
despite using the Buildroot configuration you provided.

> Do you confirm this doesn't work?

I don't confirm anything, it just didn't build here, with the error
messages that I've posted.

> I'm very confused how to skip around all those bugs in order to have a 
> functional buildroot environment.

You shouldn't try to "skip around", but instead you should help us to
_fix_ those issues. The support for Qt5+OpenGL is still fairly, and
since there are multiple OpenGL implementation, generally one for each
platform, we haven't yet tested and fixed all the possible
combinations. It is thanks to bug reports provided by users like you
that we can progressively fix those issues, and provide a build system
that is more and more capable to build all configurations correctly
out-of-the-box.

Best regards,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Il 21/06/2014 15:04, Thomas Petazzoni ha scritto:
> I don't confirm anything, it just didn't build here, with the error 
> messages that I've posted. 

Ok, you confirm it doesn't build there. I confirm it doesn't build here.

> You shouldn't try to "skip around", but instead you should help us to 
> _fix_ those issues. The support for Qt5+OpenGL is still fairly, and 
> since there are multiple OpenGL implementation, generally one for each 
> platform, we haven't yet tested and fixed all the possible 
> combinations. It is thanks to bug reports provided by users like you 
> that we can progressively fix those issues, and provide a build system 
> that is more and more capable to build all configurations correctly 
> out-of-the-box. Best regards, Thomas 

I understand your point-of-view.
I hope you also understand the frustration of a normal user which try to 
configure its own embedded system.

In the website of buildroot I read:

"Is very easy to set up, thanks to its menuconfig, gconfig and xconfig 
configuration interfaces, familiar to all embedded Linux developers. 
Building a basic embedded Linux system with Buildroot typically takes 
15-30 minutes."

I never had a working buildroot environment since several months! Of 
course I know I'm not an expert so I cannot fix the bugs by myself.
I'm talking about a standard embedded systems (i.MX6 or RPi) with very 
common packages (Qt5, gstreamer).

I also understand no charge is required and in fact I don't expect 
anything from the buildroot staff! But for a user it's not an option to 
delay for days or weeks a project because buildroot doesn't build.

So I'm just wondering if it is possible to know which combination of 
kernel/buildroot version leads to a working environment with basic 
packages. For my current project based upon RPi I need only:

- common utility: ssh (dropbear or openssh), lighttpd, etc (no problem 
here!)
- Qt5 (all modules, egl platform)
- gstreamer with mp3, mp4 h264 and qtmultimedia support

By the way, I don't need Qt5.3, I could use 5.2 as well.

Best regards
Marco

[Buildroot] Help about gstreamer h264 in buildroot

[Marco Trapanese]

Il 21/06/2014 15:23, Marco Trapanese ha scritto:
> So I'm just wondering if it is possible to know which combination of 
> kernel/buildroot version leads to a working environment with basic 
> packages. For my current project based upon RPi I need only:
>
> - common utility: ssh (dropbear or openssh), lighttpd, etc (no problem 
> here!)
> - Qt5 (all modules, egl platform)
> - gstreamer with mp3, mp4 h264 and qtmultimedia support


I'm close to find a working solution.
Attached there is the current .config file.

Qt5 is working
QtMultimedia is working
gstreamer for mp3 decoding is working

I can't play only mp4 video files. GStreamer tells me there are no video 
sinks available.

Which buildroot package contains a gstreamer video sink that works 
without X (egl/gles) ?

Thanks again
Marco


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[Buildroot] Help about gstreamer h264 in buildroot

[Arnout Vandecappelle]

On 14/06/14 11:19, Marco Trapanese wrote:
> Hello,
> I'm trying to play mp4 h264 video files on a RPi.
> Attached there is the .config file.
> When I try to play such a file I get this error:
> 
> Warning: "No decoder available for type 'video/x-h264,
> stream-format=(string)avc, alignment=(string)au, level=(string)4,
> profile=(string)main,
> codec_data=(buffer)014d4028ffe10016274d4028a9180f0044fcb8035010101b6c2b5ef7c04001000428de09c8,
> width=(int)1920, height=(int)1080, framerate=(fraction)25/1,
> pixel-aspect-ratio=(fraction)1/1, parsed=(boolean)true'."
> Error: "Your GStreamer installation is missing a plug-in."
> 
> Anyway I selected (and checked with gst-inspect) the x264parse plugin (from bad-
> ones).
> After a search on the web it seems I need also the gst-ffmpeg but this requires
> libavcodec which cannot compile:
> 
> libavcodec/arm/ac3dsp_armv6.S: Assembler messages:
> libavcodec/arm/ac3dsp_armv6.S:40: Error: selected processor does not support ARM
> mode `movw r8,#0x1fe0'

 This is a bug in gst-ffmpeg's libavcodec: we explicitly pass
--enable-armv6 --disable-armv6t2
to configure, but it still uses armv6t2 instructions (movw with 16-bit immediate).

 The upstream ffmpeg patch that fixes it is in
http://git.videolan.org/?p=ffmpeg.git;a=commit;h=9a83adaf346bc5e38183427b2bd11084c11d1c8b

 I'll post a patch in a minute.

 Regards,
 Arnout

> 
> 
> I was working on a 2014.05-git-00366-gba25b12-dirty version.
> I tried on a newer one (2014.08-git-00302-g712414c) but there is the same error.
> 
> What am I missing?
> 
> Thanks!
> Marco
> 
> 
> 
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
> 


-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F