gscam Ubuntu 18.04 ROS Melodic: Failed to initialize gscam stream!

[HaroldMurcia]

I work with the DFM 27UR0135-ML camera:

v4l2-ctl --all

Driver Info (not using libv4l2):
	Driver name   : uvcvideo
	Card type     : DFM 27UR0135-ML
	Bus info      : usb-0000:00:14.0-2
	Driver version: 5.0.21
	Capabilities  : 0x84A00001
		Video Capture
		Metadata Capture
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps   : 0x04200001
		Video Capture
		Streaming
		Extended Pix Format
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
	Width/Height      : 1280/960
	Pixel Format      : 'GRBG'
	Field             : None
	Bytes per Line    : 1280
	Size Image        : 1228800
	Colorspace        : Default
	Transfer Function : Default (maps to Rec. 709)
	YCbCr/HSV Encoding: Default (maps to ITU-R 601)
	Quantization      : Default (maps to Full Range)
	Flags             : 
Crop Capability Video Capture:
	Bounds      : Left 0, Top 0, Width 1280, Height 960
	Default     : Left 0, Top 0, Width 1280, Height 960
	Pixel Aspect: 1/1
Selection: crop_default, Left 0, Top 0, Width 1280, Height 960
Selection: crop_bounds, Left 0, Top 0, Width 1280, Height 960
Streaming Parameters Video Capture:
	Capabilities     : timeperframe
	Frames per second: 60.000 (60/1)
	Read buffers     : 0
                     brightness 0x00980900 (int)    : min=0 max=4095 step=1 default=16 value=16
                           gain 0x00980913 (int)    : min=48 max=2047 step=1 default=48 value=2047
              exposure_absolute 0x009a0902 (int)    : min=1 max=10000 step=1 default=333 value=10
               exposure_time_us 0x0199e201 (int)    : min=100 max=1000000 step=1 default=33333 value=1000
                    gain_db_100 0x0199e204 (int)    : min=0 max=1629 step=1 default=0 value=0
                   trigger_mode 0x0199e208 (bool)   : default=0 value=0
                  trigger_delay 0x0199e210 (int)    : min=0 max=10000000 step=10 default=0 value=150
                  strobe_enable 0x0199e211 (bool)   : default=0 value=0
                strobe_polarity 0x0199e212 (bool)   : default=0 value=0
                strobe_exposure 0x0199e213 (bool)   : default=0 value=0
                          gpout 0x0199e216 (bool)   : default=0 value=0
                           gpin 0x0199e217 (bool)   : default=0 value=0
                   roi_offset_x 0x0199e218 (int)    : min=0 max=1184 step=2 default=0 value=0
                   roi_offset_y 0x0199e219 (int)    : min=0 max=864 step=2 default=0 value=0
                roi_auto_center 0x0199e220 (bool)   : default=1 value=1
               trigger_polarity 0x0199e234 (bool)   : default=0 value=0
         override_scanning_mode 0x0199e257 (int)    : min=0 max=2 step=1 default=0 value=0
   trigger_global_reset_release 0x0199e261 (bool)   : default=0 value=0

List of formats:

video/x-bayer grbg - 1280x960 - 60/1 50/1 40/1 30/1 20/1 10/1 video/x-bayer grbg - 1280x720 - 80/1 60/1 50/1 40/1 30/1 20/1 10/1 video/x-bayer grbg - 1024x768 - 80/1 70/1 60/1 40/1 30/1 20/1 10/1 video/x-bayer grbg - 640x480 - 120/1 90/1 60/1 30/1 15/1 10/1 video/x-raw GRAY8 - 1280x960 - 60/1 50/1 40/1 30/1 20/1 10/1 video/x-raw GRAY8 - 1280x720 - 80/1 60/1 50/1 40/1 30/1 20/1 10/1 video/x-raw GRAY8 - 1024x768 - 80/1 70/1 60/1 40/1 30/1 20/1 10/1 video/x-raw GRAY8 - 640x480 - 120/1 90/1 60/1 30/1 15/1 10/1 video/x-raw GRAY16_LE - 1280x960 - 70/1 60/1 50/1 40/1 30/1 20/1 10/1 video/x-raw GRAY16_LE - 640x480 - 120/1 90/1 60/1 30/1 15/1 10/1 video/x-raw { RGBx xRGB BGRx xBGR RGBA ARGB BGRA ABGR } - 1280x960 - 60/1 50/1 40/1 30/1 20/1 10/1 video/x-raw { RGBx xRGB BGRx xBGR RGBA ARGB BGRA ABGR } - 1280x720 - 80/1 60/1 50/1 40/1 30/1 20/1 10/1 video/x-raw { RGBx xRGB BGRx xBGR RGBA ARGB BGRA ABGR } - 1024x768 - 80/1 70/1 60/1 40/1 30/1 20/1 10/1 video/x-raw { RGBx xRGB BGRx xBGR RGBA ARGB BGRA ABGR } - 640x480 - 120/1 90/1 60/1 30/1 15/1 10/1

However when I use the gscam configuration:

sudo chmod 777 /dev/video0
export GSCAM_CONFIG="v4l2src ! device=/dev/video0 ! video/x-raw, format=BGRx,width=1280,height=960,framerate=60/1 ! videoconverter $
rosrun gscam gscam

I have the following response and error:

[ INFO] [1568046942.639736230]: Using gstreamer config from env: "v4l2src ! device=/dev/video0 ! video/x-raw, format=BGRx,width=1280,height=960,framerate=60/1 ! videoconverter ! video/x-raw,format=RGB ,width=1280,height=960,framerate=60/1 ! shmsink socket-path=/tmp/ros_mem" [ INFO] [1568046942.643547063]: using default calibration URL [ INFO] [1568046942.643609848]: camera calibration URL: file:///home/si2c/.ros/camera_info/camera.yaml [ INFO] [1568046942.643677431]: Unable to open camera calibration file [/home/si2c/.ros/camera_info/camera.yaml] [ WARN] [1568046942.643712920]: Camera calibration file /home/si2c/.ros/camera_info/camera.yaml not found. [ INFO] [1568046942.643743469]: Loaded camera calibration from [FATAL] [1568046942.658753473]: GStreamer: cannot link launchpipe -> sink [FATAL] [1568046942.658835823]: Failed to initialize gscam stream!**