Hi ,
I am working on DM8168 EZSDK (dm816x-evm_5_05_02_00) . when i was taking video out from composite out ,it seems the output video clarity is degrading with more brightness and less sharpness . And it seems at video out only it's more observable, So can anyone tell whether there is any control for brightness and contrast in VPSS display out . I didn't find any controls to this parameters mentioned in VPSS driver help guide or any other docs . attaching captured video screen shots at various points and pipeline for taking capture to display out.
Please keep following points in mind .
Top Left >>>>> Direct video
Top Right >>>>> Before scalar (720X288) .
Bottom left >>>>> After Scalar (720x288 ) .
Bottom Right >>>>> After Display (720X288) .
gstreamer pipeline for getting input to display .
gst-launch omx_camera input-mode=8_BIT input-interface=VIP1_PORTB skip-frames=1 ! "video/x-raw-yuv, format=(fourcc)NV12, width=720, height=288, framerate=60/1, buffer-count-requested=10" ! omx_hdeiscaler name=d d.src_00 ! "video/x-raw-yuv, format=(fourcc)YUY2, width=720, height=576" ! gstperf ! v4l2sink sync=false device=/dev/video3
Issue can cleanly observe if we compare top left ( direct video ) with bottom right (processed composite out ) screen shots and video getting worst after display only so any one can help me finding the control over brightness and contrast on VPSS display module . is there any register or through some v4l2 macros can we do that ? I have seen in standard linux v4l2 driver docs some macros are mentioned for controlling brightness and sharpness , so can any body tells which register address i can check in VPSS for the above purpose ?