Video performance on AT91SAM9263-EK?

vdkamp · **Posted:** Fri Apr 11, 2008 3:42 pm

Hello all,

I wonder if I can play a video bigger than QVGA + sound on a AT91SAM9263.

I connected a VGA 8" TFT to my AT91SAM9263-EK and this works fine.
I compiled MPlayer and this works fine too.
A 320x240 MPEG4 + OSS sound (22050Hz) uses about 75% of the processor.

But how to play a full screen VGA video? Is this possible? Has anyone done this?

Bye Arjan

Tomi91 · **Posted:** Fri Apr 18, 2008 9:54 am

good day,

I am starting to work with the 9263 Ek board
and I will connect a TFT VGA to 9263 Ek - Linux board.
How to configure and how to connect the TFT VGA to the 9263Ek board correctly.

The kernel version 2.6.23.14

thanks
Thomas

vdkamp · **Posted:** Fri Apr 18, 2008 10:51 am

I changed the kernel (my kernel is version: 2.6.22.9):
file: arch/arm/mach-at91/board-sam9263ek.c

Code:

static struct fb_videomode at91_tft_vga_modes[] = {
   {
           .name           = "FG080012DNCWAG0Z @ 60",
      .refresh   = 60,
      .xres      = 640,      .yres      = 480,
      .pixclock   = KHZ2PICOS(25000), // clk speed

      .left_margin   = 1,      .right_margin   = 33,
      .upper_margin   = 1,      .lower_margin   = 0,
      .hsync_len   = 5,      .vsync_len   = 1,

      .sync      = FB_SYNC_HOR_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
      .vmode      = FB_VMODE_NONINTERLACED,
   },
};

And I would like the traditional VSYNC HSYNC instead of HSYNC DTMG. So I changed:
file: arch/arm/mach-at91/at91sam9263_devices.c
and added to void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data):

Code:

at91_set_A_periph(AT91_PIN_PC0, 0); /* LCDVSYNC */

I soldered the TFT to the board by using a prototype board (RE450LF at www.farnell.com)
The one extra line, the VSYNC can be found on the EK board on J25 pin 28.
(But my TFT is working without VSYNC. Which is a bit strange!)

Back to topic:
I'm using the VGA TFT portaid. I used mencoder to encode a video to a resolution of 480x200 at the top of the screen. This runs lipsync if you are using framedrop. But the quality is not very high. I can't get more out of it. Anyone else?

Here is my mencoder line:
mencoder -ovc lavc -lavcopts vcodec=mpeg2video:vbitrate=500 -vf rotate=2,crop=200:480,rgb2bgr=swap,scale -oac pcm -af resample=22050:1:0,pan=1:0.5:0.5 InputFile.mp4 -o OutputFile.mp2

vdkamp · **Posted:** Tue May 20, 2008 4:23 pm

We stopped the AT91SAM9263 project because of this low video performance. We're starting all over with another processor. This time an ARM11 with MPEG hardware acceleration.

Maybe this problem can be solved. But I believe there is no processor power left to do some background stuff.

Video performance on AT91SAM9263-EK?

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