Dual camera streaming

[Pooja]

Hello everyone

I want some help regarding dual camera streaming. I'm working on rpi4 and
created a pipeline containing two source i.e. v4l2src and videotestsrc (I'm
using this because i don't have other source right now).While running the
pipeline only first source (v4l2src) stream is shown, the second source
stream is not visible. Both the pipeline gives same result.
 
----------------------------------------------------------------------------------------------------------------------------------------------------------------
(" v4l2src device=/dev/video0 !
video/x-h264,width=1280,height=720,framerate=25/1 ! h264parse ! rtph264pay
name=pay0 pt=96 ssrc=123 videotestsrc ! videobalance saturation=0 !
video/x-raw,width=640,height=480,framerate=25/1 ! jpegenc ! jpegparse !
rtpjpegpay name=pay1 pt=97 ssrc=456 ")
----------------------------------------------------------------------------------------------------------------------------------------------------------------

-----------------------------------------------------------------------------------------------------------------------------------------------------------------
"( v4l2src device=/dev/video0 !
video/x-h264,width=1280,height=720,framerate=25/1 ! h264parse ! rtph264pay
name=pay0 pt=96 ssrc=123 videotestsrc ! videobalance saturation=0 !
video/x-raw,width=640,height=480,framerate=25/1 ! x264enc ! h264parse !
rtph264pay name=pay1 pt=97 ssrc=456 )"
-----------------------------------------------------------------------------------------------------------------------------------------------------------------

Any help would be appreciated.

Thanks



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