How the Deepstream can support the multiple Videos input which from Multiple USB cameras and to do the analysis

aiu@aiu-desktop:~$ gst-launch-1.0 v4l2src device=/dev/video2 io-mode=2 ! image/jpeg,framerate=25/1,width=480,height=320 ! jpegparse ! nvv4l2decoder mjpeg=1 ! nvoverlaysink
Setting pipeline to PAUSED …
Opening in BLOCKING MODE
Opening in BLOCKING MODE
Pipeline is live and does not need PREROLL …
Setting pipeline to PLAYING …
New clock: GstSystemClock
NvMMLiteOpen : Block : BlockType = 277
NVMEDIA: Reading vendor.tegra.display-size : status: 6
NvMMLiteBlockCreate : Block : BlockType = 277
ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0: Internal data stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop (): /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-negotiated (-4)
Execution ended after 0:00:00.215651610
Setting pipeline to PAUSED …
Setting pipeline to READY …
Setting pipeline to NULL …
Freeing pipeline …
face this one error