Linux: OMAP4460 - where/how to get gstreamer VPE plugin?

Petr Kazda

Other Parts Discussed in Thread: OMAP3530

Tool/software: Linux

Hello,

I need to do video scaling using gstreamer. I am able to use videobox element, but it slows down the pipeline significantly. I would like to use accelerated VPE plugin, but it is not easy to find. We are on Ubuntu 12.04 and gstreamer0.10.

Where can I get the plugin either pre-compiled for armhf or source code?

Thank you.

over 6 years ago

0 Margarita Gashova over 6 years ago

TI__Guru* 80190 points

Hello,

What is the software release that you are using here?
What is the hardware platform that you are using?
Here is the link to gstreamer-vpe plugin
git.ti.com/.../gst-plugin-vpe
But if you are using omap44x I do not think it is available in the kernel.
Videobox plugin is for crop or enlarge since vpe is for scaling, csc and deinterlace.
I would recommend you to check with gst-inspect command to see what is available on your side.
Please take a look in this wiki
processors.wiki.ti.com/.../Example_GStreamer_Pipelines
and try: gst-inspect TIVidResize
In gstreamer there is one more element for resizing video frame but again it is software element called videoscale.
In additional, I would recommend you to use more queue elements in your pipeline.

Hope this helps.

BR
Margarita

0 Petr Kazda over 6 years ago in reply to Margarita Gashova

Prodigy 90 points

We are using TI OMAP4460 HW platform with TI Ubuntu Precise 12.04 OS (kernel 3.4.0-1489-omap4).

I am trying to build VPE, but I am stuck on this:

gstvpe.h:28:20: fatal error: libdce.h: No such file or directory

Of course I installed libdce-dev from https://launchpad.net/~tiomap-dev/+archive/ubuntu/release

Unfortunately it does not dontain libdce.h.

Do you know where to get the required lib?

0 Margarita Gashova over 6 years ago in reply to Petr Kazda

TI__Guru* 80190 points

Hello,

VPE is not supported for omap4460.
Please check this wiki:
processors.wiki.ti.com/.../Linux_Core_VPE_User's_Guide
"Supported Devices"

Please try this command :
gst-inspect-0.10 TIVidResize
If there is this element please use it. Or try to use videoscale element.

BR
Margarita

0 Petr Kazda over 6 years ago in reply to Margarita Gashova

Prodigy 90 points

Hello,
Unfortunately no such element is present in the system. The videoscale element is what I already tried, but is it terribly hitting the framerate. I am able to make only 1-2 FPS with this element in the pipeline. I tried to optimize using queue and buffering, but no luck.

Is there a way to get the TIVidResize plugin?

0 Margarita Gashova over 6 years ago in reply to Petr Kazda

TI__Guru* 80190 points

Hello,

TIVidResize is element for omap3530. I wanted to know is it available on your side.
Unfortunately I am not aware with omap4x.
Please refer the below wiki pages for omap4x.
omappedia.org/.../Gstreamer_overview
omappedia.org/.../Building_GStreamer
In first wiki there are examples.

BR
Margarita

0 Margarita Gashova over 6 years ago in reply to Margarita Gashova

TI__Guru* 80190 points

Hello,

These two pages also:
omappedia.org/.../GST_Developers_Info
omappedia.org/.../GST_build
I would recommend you to search in omappedia for more information about gst on omap4460.

BR
Margarita

0 Petr Kazda over 6 years ago in reply to Margarita Gashova

Prodigy 90 points

Ok, thank you. I will try to find out what is wrong with the videoscale element.

0 Petr Kazda over 6 years ago in reply to Petr Kazda

Prodigy 90 points

Just as reference for others:

- I tried to build VPE - it is missing header files from gstreamer 1.0 (gstvideometa.h), which is not available for OMAP with omx camera (the omx_camera element is missing for some reason) -> dead end.

- I tried ffvideoscale, cogvideoscale and videoscale - all of them are so slow on CPU, that the resulting video is unusable (more like slide-show :)) -> dead end.

- I found some openGL scalers (glcolorscale) - they are available only in gstreamer 1.0, which is not working for us -> dead end.

I tried also different tweaks and hacks, but it simply does not work. Seems that the combination of SW videoscaler and HW accelerated h264encoder (ducatih264enc) does not work on OMAP4460.

I am giving up as there is probably no way how to get accelerated video scaling on OMAP4.

Thanks for support anyway.

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Linux: OMAP4460 - where/how to get gstreamer VPE plugin?