YUV sensor input-----v4l2-ctl succeed！ gst-launch-1.0 fail ！

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

dear all,

I have transplanted a YUV sensor(YUV422 8bit) that works properly using v4l2-ctl;

but gst-launch-1.0 was not able to capture images , as follow:

v4l2-ctl -d /dev/video0 -w --verbose --set-fmt-video=width=1920,height=1080,pixelformat=UYVY --stream-mmap --stream-count=1 --set-ctrl bypass_mode=0 --stream-to=/tmp/stream.yuv
<<<<<<<<<<

stream.yuv ok


gst-launch-1.0 -v v4l2src device="/dev/video0" ! "video/x-raw,width=1920,height=1080, format=(string)I420" ! nvvidconv ! "video/x-raw(memory:NVMM)" ! nvoverlaysink

Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: <b>Internal data stream error.</b>
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
2

hello JiaZW,

  1. may I know which JetPack release you’re working with.
  2. could you please have a try to launch with nvgstcapture, for example,
$ nvgstcapture-1.0 --camsrc=0
3

Hi JiaZW,

I believe the issue with the pipeline is the format field in the caps of v4l2src. I suggest the following pipeline using the same format as the v4l2-ctl command which you reported is working.

gst-launch-1.0 -v v4l2src device="/dev/video0" ! "video/x-raw,width=1920,height=1080, format=(string)UYVY" ! nvvidconv ! "video/x-raw(memory:NVMM)" ! nvoverlaysink

Regards,

4

@-desktop:~$ nvgstcapture-1.0 --camsrc=0
Encoder null, cannot set bitrate!
Encoder Profile = High
Runtime USB Camera Commands:

Help : ‘h’
Quit : ‘q’
Set Capture Mode:
mo:
(1): image
(2): video
Get Capture Mode:
gmo
Capture: enter ‘j’ OR
followed by a timer (e.g., jx5000, capture after 5 seconds) OR
followed by multishot count (e.g., j:6, capture 6 images)
timer/multihot values are optional, capture defaults to single shot with timer=0s
Start Recording : enter ‘1’
Stop Recording : enter ‘0’
Set Preview Resolution:
pcr: e.g., pcr:2
(0) : 176x144
(1) : 320x240
(2) : 640x480
(3) : 1280x720
(4) : 1920x1080
NOTE: Preview/Encode resolution will be same as Capture resolution for USB-Camera
Get Preview Resolution:
gpcr
Get Image Capture Resolution:
gicr
Get Video Capture Resolution:
gvcr
Set Capture Device Node:
cdn: e.g., cdn:0
(0): /dev/video0
(1): /dev/video1
(2): /dev/video2
Get Capture Device Node:
gcdn

Runtime encoder configuration options:

Set Encoding Bit-rate(in bytes):
br: e.g., br:4000000
Get Encoding Bit-rate(in bytes):
gbr
Set Encoding Profile(only for H.264):
ep: e.g., ep:1
(0): Baseline
(1): Main
(2): High
Get Encoding Profile(only for H.264):
gep
Force IDR Frame on video Encoder(only for H.264):
Enter ‘f’

** Message: 22:52:56.178: main:4564 iterating capture loop …
ERROR on bus: by /GstPipeline:capture_native_pipeline/GstBin:cap_bin/GstV4l2Src:v4l2src0: Internal data stream error.
debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:capture_native_pipeline/GstBin:cap_bin/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
** Message: 22:52:56.237: main:4574 Capture completed
** Message: 22:52:56.238: main:4623 Camera application will now exit

5

Hi,
Please refer to
[url]Logitech C930e on Jetson TX1 very slow and choppy video - Jetson TX1 - NVIDIA Developer Forums
You have to configure exact width ,height, format, and framerate in the pipeline.

6

dear DaneLLL,

width ,height, format, and framerate all ok

7

Hi JiaZW,
Does it work for you by following the post ?