H.264 too slowly on i.MX6

[ivanskl]

Hi!

I'm writing program for i.MX6 SABRE Lite board. In my program (I'm using QT/qml+OpenCV) I receave 4 h.264-stream from 4 IP-cameras, but it's too slowly, delay about 2 sec even on 360x240 resolutions. :smileysad:

In the user manual for this board I've read: "Mult-stream-capable HD video delivering H.264 1080p60 decode, 1080p30 encode? and 3-D video playback in HD." Where is it? How can I use it in my project in QT/C++ ?

I'm using Ubuntu Xenial for i.MX6/7 boards – August 2016 (kernel 4.1.15) from here: https://boundarydevices.com/ubuntu-xenial-mx67-boards-august-2016-kernel-4-1-15/

Thank You for any advices.

[ivanskl]

OK, I've found data sheet and my processor has VPU. Then I've read "i.MX 6DQ Reference Manual (IMX6DQRM R2, Part 2)" about VPU (Chapter 69) and I've found something interesting there: "NOTE RealNetwork video codec is disabled by default on i.MX 6 series processors. Please contact your Frescale sales representative for  more details."

Can you say something about that?

[igorpadykov]

Hi Ivan

one can verify with full part number that processor has vpu module

(i.MX6DQ/SDL have it) and try gstreamer-imx plugins

Building GStreamer plugins under Ubuntu - Boundary Devices 

Best regards
igor
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[ivanskl]

Thank you for your reply. Processor on my board marked like PCIMX6QSEVT10AC.

Here is cpuinfo;

root@nitrogen:/proc# cat /proc/cpuinfo
processor    : 0
model name    : ARMv7 Processor rev 10 (v7l)
BogoMIPS    : 7.54
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x2
CPU part    : 0xc09
CPU revision    : 10

processor    : 1
model name    : ARMv7 Processor rev 10 (v7l)
BogoMIPS    : 7.54
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x2
CPU part    : 0xc09
CPU revision    : 10

processor    : 2
model name    : ARMv7 Processor rev 10 (v7l)
BogoMIPS    : 7.54
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x2
CPU part    : 0xc09
CPU revision    : 10

processor    : 3
model name    : ARMv7 Processor rev 10 (v7l)
BogoMIPS    : 7.54
Features    : half thumb fastmult vfp edsp neon vfpv3 tls vfpd32
CPU implementer    : 0x41
CPU architecture: 7
CPU variant    : 0x2
CPU part    : 0xc09
CPU revision    : 10

Hardware    : Freescale i.MX6 Quad/DualLite (Device Tree)
Revision    : 63012
Serial        : 0000000000000000
root@nitrogen:/proc#

How to undestand is there any VPU?

About gstreamer, yes OpenCV uses it

[igorpadykov]

some codecs may require licensing, like between

customer and Real Networks. Please apply to local marketing office

for more details.

Worldwide Locations|NXP 

sect.1.1 Ordering Information i.MX6DQ Datasheet shows which processors have vpu

http://www.nxp.com/docs/en/data-sheet/IMX6DQCEC.pdf

Best regards
igor

[ivanskl]

If it means "RealNetwork protocol", then I don't use that protocol, I use only h.264 in my Local Network. 

And for now, I don't understand how to enhance h264 stream reading from IP camers in my program on i.mx6 board. Is there any way?