How to capture video frames in DM8148 evm kit?

Hello,

I would suggest you to check for more information:

OMX user guilde (/ti-ezsdk_dm814x-evm_5_05_02_00/component-sources/omx_05_02_00_48).

Also :

http://processors.wiki.ti.com/index.php/TI81XX_PSP_VIDEO_CAPTURE_Driver_User_Guide

Shengzhe Li said:

I have another problem that is not related to this topic. Until few days ago, OMX sample code works properly. But it doesn't work now. For this reason, I deleted all files and re-installed, re-compiled. But it still doesn't work. Can anyone tell me what should I do?

What you mean by not working? Provide more details.

Shengzhe Li said:

Now, I'm trying V4L2 dirver examples which are located in 'ezsdk/example-applications/linux-driver-examples-psp04.04.00.01/video/', however, the examples are not working.

Provide more details about video source, how is connected to the board, what error you are observing etc.

BR

Margarita

Thank you Margarita!

Below text is entire printed message when I tryed video capture using OMX sample code.
Source is 'video component' and out port is 'HDMI'.



root@dm814x-evm:/usr/share/ti/ti-omx# ./capture_encode_a8host_debug.xv5T -o samp
le.h264 -m 1080p -f 60 -b 1000000 -d 0 -n 500
output file: sample.h264
bit_rate: 1000000
frame_rate: 60
num_frames: 500
mode: 1080p
display_id: 0
 Capture-Encode example
===============================
 OMX_Init completed
 UIAClient is ready to send a UIA configuration command
UIAClient received UIA_CONFIGURE_ACK
UIAClient is done sending requests
UIAClient is ready to send a UIA configuration command
UIAClient received UIA_CONFIGURE_ACK
UIAClient is done sending requests
 openeing file
 capture compoenent is created
 control TVP compoenent is created
Buffer Size computed: 3110400
set input port params (width = 1920, height = 1080)enable capture output port
got eventEnable/Disable Event
 dei compoenent is created
set input port params (width = 1920, height = 1080)
set output port params (width = 1920, height = 1080)set output port params (width = 1920, height = 1080)set number of channelsset i
nput resolutionset output resolutionenable dei input port
got eventEnable/Disable Event
enable dei output port 0
got eventEnable/Disable Event
enable dei output port 1
got eventEnable/Disable Event
 encoder compoenent is created
found handle 0x1244f8 for component OMX.TI.VPSSM3.VFDC
 got display handle
found handle 0x128500 for component OMX.TI.VPSSM3.CTRL.DC
Buffer Size computed: 4147200
set input port params (width = 1920, height = 1080)setting input and output memory type to defaultenable input port
got eventEnable/Disable Event
 connect call for capture-Dei
  connect call for dei- encoder
  connect call for dei-display
 got eventState changed to: OMX_StateIdle
 Capture outport buffers allocated
 got eventState changed to: OMX_StateIdle
 Capture is in IDLE state
 Dei input port use buffer done
  DEI outport buffers allocated
 got eventState changed to: OMX_StateIdle
 DEI is in IDLE state
 encoder input port use buffer done
  encoder outport buffers allocated
 got eventState changed to: OMX_StateIdle
 Encoder state IDLE
 got eventState changed to: OMX_StateIdle
 ctrl-dc state IDLE
  display buffers allocated
 waiting for IDLEgot eventState changed to: OMX_StateIdle
 display state IDLE
 got eventState changed to: OMX_StateExecuting
 display control state execute
 got eventState changed to: OMX_StateExecuting
 display state execute
 got eventState changed to: OMX_StateExecuting
 encoder state execute
 got eventState changed to: OMX_StateExecuting
 dei state execute
 got eventState changed to: OMX_StateExecuting
 capture state execute


At here, progress is stopped and I can see only white in hdmi display.
As I told you previously, It worked properly. But not now.

And I have more question.
After some attempt, I tryed video capture using psp-examples instead of OMX.
But it printed fail message and did not work either.
What's the problem?


--------------printed message----------------
root@dm814x-evm:~/dm814x-evm/usr/share/ti/ti-psp-examples# ./saLoopBack
failed to open capture device
Error in opening capture device for channel 0

Hello,

Shengzhe Li said:

At here, progress is stopped and I can see only white in hdmi display.
As I told you previously, It worked properly. But not now.

Are you made some changes?

Could you try:

make clean

make all

make install

and cp the capture_encode binary?

I cannot open the .jpg file could you attach it here ?

Could you check your video source (plug-unplug)?

BR

Margarita

Hi Margarita,

Thanks for you quick reply.

My problem was exactly as you said.

Now my board can run the v4l2 demos.

Hello,

I am glad that the issue is solved.

BR

Margarita