playing video on i.mx6 two screens lagging

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playing video on i.mx6 two screens lagging

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andreykononov
Contributor III

i'm connect HDMI and LVDS screens to SABRE for Automotive and trying to play video file (1280x720) via qmlvideofx from QT examples on ech screen and it lagging a bit

kernel init cmd  (yocto jethro kernel )

bootargs console=${console},${baudrate} ${smp} root=${mmcroot} video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24 video=mxcfb1:dev=ldb,1280x480M,if=RGB666,ldb=sin1

start scripts

root@imx6qsabreauto:~# cat /home/root/bin/hdmi.sh    

#!/bin/sh    

export QT_QPA_EGLFS_FB=/dev/fb0    

export FB_FRAMEBUFFER_0=/dev/fb0    

export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1   

export QT_QPA_PLATFORM=eglfs   

/home/root/bin/test

root@imx6qsabreauto:~# cat /home/root/bin/lvds.sh

#!/bin/sh

export QT_QPA_EGLFS_FB=/dev/fb4

export FB_FRAMEBUFFER_0=/dev/fb4

export QT_EGLFS_IMX6_NO_FB_MULTI_BUFFER=1

export QT_QPA_PLATFORM=eglfs

/home/root/bin/test

is it normal or can be fixed?

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1 Reply

344 Views
igorpadykov
NXP Employee
NXP Employee

Hi Andrey

p.6 below presentation shows max. two video performance

without os

Q&A: MX6 VPU H.264 Dual Stream Encode Limits

it may be less based on bus load and application

Best regards

igor

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