YUV420 video display on LCD

king king

I'm doing this work,to display video of yuv420p on lcd.I use DM365evm.Now we can display a video of RGB565 on LCD.We convert the yuv420 to RGB565,it's so slow like a cartoon show.

I wonder that if the fb driver can display a YUV420 video directly.From the forum,we know that fb driver for DM365 only surrports YUV422 and RGB565,we also try the YUV422 video,it also failed.

Also we test the decode_lcd demo in the DVSDK.But we can't get the right image on LCD.If we do something wrong on it?

RGB for us is OK.So the LCD and FB driver are both ok,we think.

Does anything we need to do additonally?

thank you

KINGKING

over 14 years ago

0 king king over 14 years ago

Intellectual 650 points

nobody help me？

0 king king over 14 years ago in reply to king king

Intellectual 650 points

where's the TI engineer？

0 zanget over 14 years ago in reply to king king

Expert 2150 points

When you want to use OSD Video Window in YUV4:2:0 mode, you have to use both video windows VID0 and VID1 for just one YUV420 data. Y data goes to VID0 and UV interleaved data goes to VID1.

i get it form the other thread. may be it can help you a lot .

regards, Mike

0 vipul mahajan over 13 years ago in reply to zanget

Intellectual 900 points

Hi,

Do you know how to convert Mpeg4dec output (YUV420 semi planer and YUV422 interleaved) to RGB, to display over LCD. I am using DM368EVM provided by TI.

0 zanget over 13 years ago in reply to vipul mahajan

Expert 2150 points

hi, mahajan you can refer to the ti demo ship with DVSDK.

try to display your YUV data to /dev/video2 or /dev/video3

and your rgb (GUI) will be passed to /dev/fb0

hope this help.

regards, Mike

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YUV420 video display on LCD