Hardware video decode on RPi3

Hardware video decode on RPi3

[Rudolf J Streif]

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I am trying to play back mp4 video (venerable Big Buck Bunny at this 
time) on RPi3.

I added gstreamer1.0, gstreamer1.0-omx and the plugins to the image.

libgstomx.so is installed in usr/lib/gstreamer-1.0 on target.

However, gst-inspect-1.0 | grep omx does not return any results.

Consequently,

gst-launch-1.0  filesrc 
location="/home/root/kiosk/kiosk/videos/bunny.mp4" ! qtdemux ! h264parse 
! omxh264dec ! kmssink
WARNING: erroneous pipeline: no element "omxh264dec"

I guess I am missing something somewhere but I don't know what.

Thanks,
Rudi


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Re: [yocto] Hardware video decode on RPi3

[Khem Raj]

On Thu, Nov 19, 2020 at 7:38 PM Rudolf J Streif
<rudolf.streif@ibeeto.com> wrote:
>
> I am trying to play back mp4 video (venerable Big Buck Bunny at this
> time) on RPi3.
>
> I added gstreamer1.0, gstreamer1.0-omx and the plugins to the image.
>
> libgstomx.so is installed in usr/lib/gstreamer-1.0 on target.
>
> However, gst-inspect-1.0 | grep omx does not return any results.
>
> Consequently,
>
> gst-launch-1.0  filesrc
> location="/home/root/kiosk/kiosk/videos/bunny.mp4" ! qtdemux ! h264parse
> ! omxh264dec ! kmssink
> WARNING: erroneous pipeline: no element "omxh264dec"
>
> I guess I am missing something somewhere but I don't know what.
>

are you using userland for graphics or vc4 ?

> Thanks,
> Rudi
>
>
> 
>

Re: [yocto] Hardware video decode on RPi3

[Rudolf J Streif]

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Thanks, Khem.

On 11/22/20 11:15 PM, Khem Raj wrote:
> On Thu, Nov 19, 2020 at 7:38 PM Rudolf J Streif
> <rudolf.streif@ibeeto.com> wrote:
>> I am trying to play back mp4 video (venerable Big Buck Bunny at this
>> time) on RPi3.
>>
>> I added gstreamer1.0, gstreamer1.0-omx and the plugins to the image.
>>
>> libgstomx.so is installed in usr/lib/gstreamer-1.0 on target.
>>
>> However, gst-inspect-1.0 | grep omx does not return any results.
>>
>> Consequently,
>>
>> gst-launch-1.0  filesrc
>> location="/home/root/kiosk/kiosk/videos/bunny.mp4" ! qtdemux ! h264parse
>> ! omxh264dec ! kmssink
>> WARNING: erroneous pipeline: no element "omxh264dec"
>>
>> I guess I am missing something somewhere but I don't know what.
>>
> are you using userland for graphics or vc4 ?

Yes, I am. I actually discovered what the problem was: I built my system 
for 64-bit but Broadcom's proprietary libraries are 32-bit. I switched 
the system to 32-bit and now gst-inspect shows omx support.

Unfortunately, decoding is still not working. This works:

gst-launch-1.0  -v videotestsrc ! omxh264enc ! h264parse ! avdec_h264 ! 
autovideosink

However, this does not:

gst-launch-1.0  -v videotestsrc ! omxh264enc ! h264parse ! omxh264dec ! 
autovideosink

I also tried with kmssink with the same results.

I am using EGLFS backend. It appears to me that there is something off 
with the omxh264dec decoder plugin passing the decoded buffers on to the 
output sink. Unfortunately, I have not been able to figure out what that 
could be.

Ultimately, this would go into a Qt application. I have never had any 
issues with EGLFS and Qt hence I would be reluctant to switch the 
backend to Wayland/Weston or X11. But of course I also don't know if 
omxh264dec would work with either one of those backends.

>> Thanks,
>> Rudi
>>
>>
>> 
>>
-- 
Rudolf J Streif
CEO/CTO ibeeto
+1.855.442.3386 x700


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[yocto] Hardware video decode on RPi3

[Rudolf J Streif]

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I am trying to play back mp4 video (venerable Big Buck Bunny at this 
time) on RPi3.

I added gstreamer1.0, gstreamer1.0-omx and the plugins to the image.

libgstomx.so is installed in usr/lib/gstreamer-1.0 on target.

However, gst-inspect-1.0 | grep omx does not return any results.

Consequently,

gst-launch-1.0  filesrc 
location="/home/root/kiosk/kiosk/videos/bunny.mp4" ! qtdemux ! h264parse 
! omxh264dec ! kmssink
WARNING: erroneous pipeline: no element "omxh264dec"

I guess I am missing something somewhere but I don't know what.

Thanks,
Rudi





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