Xavier,Jetpack4.6,Cannot change to V4L2_PIX_FMT_YUYV format

[nvidias]

Hi,

Now ,I use a camera with 3840x2160, YUYV 8bit output format.
I wanted to change xavier’s format to YUYV 8bit, my steps:

1. modify dts :

            csi_pixel_bit_depth = "8";
    mode_type = "yuv";
    pixel_phase = "yuyv";
   

2. When calling the “extract_pixel_format()” function, make sure “*format” is assigned a value of “V4L2_PIX_FMT_YUYV”, i.e “*format = V4L2_PIX_FMT_YUYV;”

3. To ensure V4L2_PIX_FMT_YUYV format, force assignment to “MEDIA_BUS_FMT_YUYV8_2X8” in the v4l2sd_set_fmt() function, as shown in the figure below:

Result:
The image display is abnormal, as shown below:

some log:

The problem:
How do I modify the YUV format correctly so that the camera displays the normal image?
Thanks!

BR.

[ShaneCCC]

Change the pixel_phase to UYVY or any others to check.

@nvidias

pixel_phase = "yuyv"

[nvidias]

Hi , ShaneCCC
Thanks for your reply!
Let me try some other formats.
I confirm that the format of the camera is YUYV422, and YUV tools is also used to check the format of the raw data after saving.

Thanks!
BR.

[nvidias]

Hi ShaneCCC,
I tried UYVY, but the result was the same as YUYV.

I confirm that the output format of this camera is YUYV 422.

When I use 7yuv tool to open the raw data,as following pictures :
normal with YUYV422:

abnormal with

BR.

[ShaneCCC]

If RAW image without problem by 7yuv I think it could be the APP problem to show the frame.

[nvidias]

Hi ShaneCCC，
Thanks for your reply！
I use command“gst-launch-1.0 v4l2src device=/dev/video4 ! videoconvert ! xvimagesink&” to show the frame, are you meaning there’s something wrong with this command?

Thanks!

BR.

[ShaneCCC]

Have a try below commands.

gst-launch-1.0 -v v4l2src device=/dev/video4 ! 'video/x-raw, width=3840, height=2160,  format=YUYV' ! xvimagesink sync=false

gst-launch-1.0 nvv4l2camerasrc device= /dev/video4 ! 'video/x-raw(memory:NVMM), width=(int)3840, height=(int)2160, format=YUYV' ! nvvidconv ! xvimagesink sync=false

[nvidias]

Hi , ShaneCCC

Thanks for your reply！

I failed when I tried the above command，as following picture：

Thanks！
BR.

[ShaneCCC]

How about below command.

gst-launch-1.0 -v v4l2src device=/dev/video4 ! 'video/x-raw, width=3840, height=2160,  format=YUYV' ! nvvidconv ! xvimagesink sync=false

[nvidias]

Hi ShaneCCC
Thanks very much for your reply!
The command above does not work either, as shown in the figure below:

Thanks!
BR.

[ShaneCCC]

Have reference to below topic to adjust the command line to try.

How to make property pipiline for nvv4l2camerasrc YUY2?

Hi NV_Team, I have an V4L2 camera (YUV 4:2:2) → YUYV. If I use this command to open this camera to preview (display green screen not correct color) nvidia@xavier:~$ gst-launch-1.0 -ev v4l2src device=/dev/video0 ! 'video/x-raw,format=YUY2,width=1280,height=720' ! videoconvert ! fpsdisplaysink video-sink=xvimagesink sync=false if change to this command is display color correct. nvidia@xavier:~$ gst-launch-1.0 -ev v4l2src device=/dev/video0 ! rawvideoparse format=5 width=1280 height=720 ! vide…

[yuyeo0605]

Hi,

Mai I ask which camera do you use for this?

I am using a camera with 1920x1080, YUV422 8bit output but I am struggling now.

Need some help…

Thanks,