[Buildroot] gstreamer-1.0 and egl

[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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[Buildroot] gstreamer-1.0 and egl

[Vicente Olivert Riera]

Hello Marco,

On 27/05/16 16:49, Marco Trapanese wrote:
[...]

> Another weird thing about gstreamer. The very first time I launch any
> gstreamer command I get this errors:
> 
>> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin':
>> can't resolve symbol

[..]

> 
> 
> The second time it acts as expected.
> Any idea?

the first time fails and the second time works..., it looks to me as a
race-condition problem. Try with only one job for make:

BR2_JLEVEL=1

You can set it in the "Build options" menu.

Regards,

Vincent.

> Thanks in advance
> Marco
> 
> 
> 
> 
> 
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
> 

[Buildroot] gstreamer-1.0 and egl

[Vicente Olivert Riera]

Ah, sorry, I thought you were getting the errors when building
gstreamer. Ignore my last email.

Regards,

Vincent.

On 27/05/16 16:58, Vicente Olivert Riera wrote:
> Hello Marco,
> 
> On 27/05/16 16:49, Marco Trapanese wrote:
> [...]
> 
>> Another weird thing about gstreamer. The very first time I launch any
>> gstreamer command I get this errors:
>>
>>> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin':
>>> can't resolve symbol
> 
> [..]
> 
>>
>>
>> The second time it acts as expected.
>> Any idea?
> 
> the first time fails and the second time works..., it looks to me as a
> race-condition problem. Try with only one job for make:
> 
> BR2_JLEVEL=1
> 
> You can set it in the "Build options" menu.
> 
> Regards,
> 
> Vincent.
> 
>> Thanks in advance
>> Marco
>>
>>
>>
>>
>>
>> _______________________________________________
>> buildroot mailing list
>> buildroot at busybox.net
>> http://lists.busybox.net/mailman/listinfo/buildroot
>>
> _______________________________________________
> buildroot mailing list
> buildroot at busybox.net
> http://lists.busybox.net/mailman/listinfo/buildroot
> 

[Buildroot] gstreamer-1.0 and egl

[Gustavo Zacarias]

On 27/05/16 12:49, Marco Trapanese wrote:

> Hello,
>
> I attach the configuration of my (dirty) Buildroot environment for RPi3,
> baseup upon 2016.05-git-01212-gabfaf47.
> In gst-1-plugins-bad I selected opengl (gles2, egl and dispmanx) and
> wayland but the opengl support is still not available:
>
>> checking for GLES2... yes
>> checking for EGL... yes
>> checking EGL/fbdev_window.h usability... no
>> checking EGL/fbdev_window.h presence... no
>> checking for EGL/fbdev_window.h... no
>> checking for bcm_host_init in -lbcm_host... yes
>> checking bcm_host.h usability... yes
>> checking bcm_host.h presence... yes
>> checking for bcm_host.h... yes
>> checking for eglGetProcAddress in -lEGL... yes
>> checking EGL/egl.h usability... yes
>> checking EGL/egl.h presence... yes
>> checking for EGL/egl.h... yes
>> checking for glEnable in -lGLESv2... yes
>> checking GLES2/gl2.h usability... yes
>> checking GLES2/gl2.h presence... yes
>> checking for GLES2/gl2.h... yes
>> checking for WAYLAND_EGL... no
>> checking libdrm/drm_fourcc.h usability... no
>> checking libdrm/drm_fourcc.h presence... no
>> checking for libdrm/drm_fourcc.h... no
>> checking for GST_ALLOCATORS... yes
>> host is arm-buildroot-linux-uclibcgnueabihf
>> configure: WARNING: X or Wayland is required for OpenGL support
>
> it's not enough to select BR2_PACKAGE_WAYLAND=y ?
> I don't find any reference to WAYLAND_EGL
> My goal is to have a suitable videosink without X, in order to use
> gstreamer as backend for Qt5Multimedia.

Hi.
wayland-egl is normally provided by open EGL implementations, such as 
mesa. It's basically small glue code into the EGL surface for wayland.
I'm not aware of closed EGL providers providing it (basically 
wayland-egl.pc and minions).
It may be possible to just hack and use the mesa bits with closed ones 
since it's pretty generic, however i've never pursued this.
Regards.

[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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[Buildroot] gstreamer-1.0 and egl

[Gustavo Zacarias]

On 27/05/16 13:11, Marco Trapanese wrote:

> Il 27/05/2016 18:05, Gustavo Zacarias ha scritto:
>> wayland-egl is normally provided by open EGL implementations, such as
>> mesa. It's basically small glue code into the EGL surface for wayland.
>> I'm not aware of closed EGL providers providing it (basically
>> wayland-egl.pc and minions).
>> It may be possible to just hack and use the mesa bits with closed ones
>> since it's pretty generic, however i've never pursued this.
>
> I'm not sure to fully understand this - I apologize.
> What do you mean with "closed providers"?
>
> In my system I selected rpi-userland as egl "provider", I guess.
> Are you suggesting to remove rpi-userland and select mesa3d, w/ Gallium
> vc4 driver, OpenGL EGL/ES packages?
> I'm afraid about the compatibility with Qt5/QML/Webkit...
>
> Best regards
> Marco

Hi Marco.
Closed = Binary/BLOB = rpi-userland for example.
For open drivers mesa DOES provide wayland-egl which is the tiny missing 
piece for this to build/work.
But from the closed ones i've seen (rpi-userland, nvidia and mali i 
believe) they don't, so in my limited experience: i have yet to see any 
!= mesa provide it.
I have yet to succeed in building a vc4-enabled kernel that works right 
for rpi, i didn't give it much time either (tried circa 4.4-4.5 kernels, 
no 4.6 yet). Vanilla kernels require patches, mostly for dts-enabling 
them, from a quick grep even for 4.6.
Regards.

[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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[Buildroot] gstreamer-1.0 and egl

[Gustavo Zacarias]

On 27/05/16 13:21, Marco Trapanese wrote:

> Thanks for the clarifications.
> Tonight I'm going to rebuild the whole environment using mesa3d - I hope
> it will work!
>
> Best regards

Keep in mind that in order to use the open vc4 driver you need a special 
(different) kernel config with the dts patches at the least, plus some 
config.txt tweaks.
There are some notes here, but they don't seem to be up to date:
https://dri.freedesktop.org/wiki/VC4/
Regards.

[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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[Buildroot] gstreamer-1.0 and egl

[Peter Seiderer]

Hello Marco,

On Fri, 27 May 2016 17:49:18 +0200, Marco Trapanese <marcotrapanese@gmail.com> wrote:

[...]

> 
> Another weird thing about gstreamer. The very first time I launch any gstreamer command I get this errors:
> 
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstopengl.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstmpegtsdemux.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstwaylandsink.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstmpegtsmux.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstmpegpsdemux.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstrtmp.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstautoconvert.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstvoaacenc.so': unknown dl-error
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_free': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'khrn_platform_malloc': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'platform_memcpy': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_recv': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_begin': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_end': can't resolve symbol
> /usr/libexec/gstreamer-1.0/gst-plugin-scanner: symbol 'rpc_send_ctrl_write': can't resolve symbol
> (gst-plugin-scanner:407): GStreamer-WARNING **: Failed to load plugin '/usr/lib/gstreamer-1.0/libgstmpegpsmux.so': unknown dl-error
> 
> 
> The second time it acts as expected.
> Any idea?

Gstreamer is building a binary registry the first time you start it (e.g. at
~/.cache/gstreamer-1.0/registry.x86_64.bin), which gives
the error messages (about some library mismatch (changed config and no rebuild?))
and disables all failed plugins in the registry, so no more warnings on second
invocation of a gstreamer command...

Regards,
Peter

> 
> Thanks in advance
> Marco
> 
> 
> 

[Buildroot] gstreamer-1.0 and egl

[Marco Trapanese]

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