dm365 video window configuration for NV12

dibin ms

Hi ,

I am using DVSDK 4.0.2 kenel version 2.6.32

I tried to play video on both windows video2 and video3 .

the video is not playing when it is in NV12 format

GST_DEBUG=tidisplaysink2:3 gst-launch -v videotestsrc !video/x-raw-yuv,width=480,height=272 ! tidisplaysink2 device = "/dev/video2" video-standard=auto display-output=LCD sync=false &
GST_DEBUG=tidisplaysink2:3 gst-launch -v videotestsrc !video/x-raw-yuv,width=320,height=240 ! tidisplaysink2 device = "/dev/video3" video-standard=auto display-output=LCD sync=false &

I can see test pattern in both windows.

GST_DEBUG=tidisplaysink2:3 gst-launch -v videotestsrc ! 'video/x-raw-yuv,width=480,height=272,format=(fourcc)NV12' ! tidisplaysink2 device="/dev/video2" video-standard=auto display-output=LCD sync=false &

GST_DEBUG=tidisplaysink2:3 gst-launch -v videotestsrc ! 'video/x-raw-yuv,width=320,height=240,format=(fourcc)NV12' ! tidisplaysink2 device = "/dev/video3" video-standard=auto display-output=LCD sync=false &

Can see test pattern in ONLY ONE window.

On digging in the driver it using get_another_layer when the format is NV12 .

please share if you have any inputs .

why the NV12 format uses other video window too. As per data sheet two windows can be used interdependently.

Regards,

Dibin

over 9 years ago

0 Prabhakar Lad over 9 years ago

Guru 11260 points

Hi,

Please refer page 84 of [1]

[1] www.ti.com/.../sprufg9c.pdf

Cheers,
--Prabhakar Lad

0 dibin ms over 9 years ago in reply to Prabhakar Lad

Intellectual 500 points

Hi Prabhakar,

I checked the document .

For YC420, even if the display data is single video/image, both VIDWIN0 and VIDWIN1 parameters must
be used.

so If I choose YC420 will 1 be able to display only one window?
is there any explanation for this ?

Regards,
Dibin

0 Prabhakar Lad over 9 years ago in reply to dibin ms

Guru 11260 points

Hi,

Yes if you choose nv12/420 format you can display the video/images.
Please refer to this sample app [1]. I dont remember testing it with gstreamer.

[1] arago-project.org/.../projects;a=blob;f=mc/dm365/v4l2_display.c;h=d8f0c27a3875ed71154631efdc696fd039bbaccb;hb=fa1913ef9e7b424715becaa83e09949142526450

Cheers,
--Prabhakar Lad

0 dibin ms over 9 years ago in reply to Prabhakar Lad

Intellectual 500 points

Hi prabhakar,

Thankyou very much for information.

My issue is I want to use both video windows VID0 and VID1 .

but if I choose 420 format I am able to use only one window.

Is there any conversion possible in dm365 ( from 420 to 422 ) so that I can use both windows.

I tried the gstreamer with TIVidResize plugin bit it is not working.

Regards,

Dibin

0 Prabhakar Lad over 9 years ago in reply to dibin ms

Guru 11260 points

Hi,

DM365 resizer does support yuv422 to 420 but not other way round. Most of the sensors give out yuv422 itself why you dont you configure it rather then converting ?

that is correct because in case of 420,

VIDWIN0XP = VIDWIN1XP
VIDWIN0YP = VIDWIN1YP
VIDWIN0XL = VIDWIN1XL
VIDWIN0YL = VIDWIN1YL
VIDWIN0OFST = VIDWIN1OFST
VIDWINMD [9:8] = VIDWINMD [1:0]

I have never worked on gstreamer plugins of TI so I cant comment on them much.

Cheers,
--Prabhakar Lad

0 dibin ms over 9 years ago in reply to Prabhakar Lad

Intellectual 500 points

Hi Prabhakar,
Thank you very much for clarification.
The issue is I have decoder output to display plus the camera output .
Regards,
Dibin

0 Prabhakar Lad over 9 years ago in reply to dibin ms

Guru 11260 points

Hi,

Most of decoders & sensors (camera) support yuv422, should be easier to configure them.

Cheers,
--Prabhakar Lad

0 dibin ms over 9 years ago in reply to Prabhakar Lad

Intellectual 500 points

Hi,

I have created a plugin which will convert from yuv420 to yuv422 but i am getting extra bytes from the Tivideo decoder.

How can i get the valid data from Tivideo decoder output frame. ie . strip down the alignment , data etc.

If any one have any inputs pleas let me know.

Regards,

DIbin

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dm365 video window configuration for NV12