playing video on i.mx6 two screens lagging

[andreykononov]

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?

[igorpadykov]

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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