v4l2src device=/dev/video0 ! video/x-raw is not working

[santhku1]

Hi 
I m working on I.Mx8mmini and i am facing the below issue from many days, 
when i use the below  gst_rtsp_media_factory_set_launch it works fine 
 gst_rtsp_media_factory_set_launch (factory,
"( videotestsrc ! x264enc ! rtph264pay pt=96 name=pay0 )");

but When  i use the below  gst_rtsp_media_factory_set_launch Iam getting the
below error
 gst_rtsp_media_factory_set_launch (factory, "( "
     "v4l2src device=/dev/video0 ! video/x-raw !  "
      " rtph264pay name=pay0 pt=96 " ")");


0:00:04.438708075  4495     0x36622630 ERROR           GST_PIPELINE
grammar.y:726:gst_parse_perform_link: could not link v4l2src0 to pay0, pay0
can't handle caps video/x-raw
0:00:04.438842328  4495     0x36622630 WARN        rtspmediafactory
rtsp-media-factory.c:1454:default_create_element: recoverable parsing error:
could not link v4l2src0 to pay0, pay0 can't handle caps video/x-raw
0:00:04.444867441  4495 0xffffb00102d0 WARN                    v4l2
v4l2_calls.c:543:gst_v4l2_subscribe_event:<v4l2src0> Cannot subscribe
V4L2_EVENT_SOURCE_CHANGE or V4L2_EVENT_EOS event for device '/dev/video0'.
0:00:04.909678405  4495 0xffffa8004720 WARN          v4l2bufferpool
gstv4l2bufferpool.c:794:gst_v4l2_buffer_pool_start:<v4l2src0:pool:src>
Uncertain or not eno[ 6793.312810] ov5640_mipi 2-003c: s_stream: 1
ugh buffers, enabling copy threshold
0:00:05.561473250  4495 0xffffa8004720 WARN   [ 6793.953760] ov5640_mipi
2-003c: s_stream: 0
       v4l2bufferpool
gstv4l2bufferpool.c:1213:gst_v4l2_buffer_pool_dqbuf:<v4l2src0:pool:src>
Driver should never set v4l2_buffer.field to ANY
0:00:05.561774255  4495 0xffffa8004720 WARN                 basesrc
gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: Internal data stream
error.
0:00:05.561805381  4495 0xffffa8004720 WARN                 basesrc
gstbasesrc.c:3055:gst_base_src_loop:<v4l2src0> error: streaming stopped,
reason not-linked (-1)
0:00:05.562566145  4495 0xffffb00102d0 WARN               rtspmedia
rtsp-media.c:2720:default_handle_message: 0xffffb003a200: got error Internal
data stream error. (../../../../git/libs/gst/base/gstbasesrc.c(3055):
gst_base_src_loop ():
/GstPipeline:media-pipeline/GstBin:bin0/GstV4l2Src:v4l2src0:
streaming stopped, reason not-linked (-1))
0:00:05.562641897  4495     0x36622630 WARN               rtspmedia
rtsp-media.c:2989:wait_preroll: failed to preroll pipeline
0:00:05.562672522  4495     0x36622630 WARN               rtspmedia
rtsp-media.c:3293:gst_rtsp_media_prepare: failed to preroll pipeline
0:00:05.578699198  4495     0x36622630 ERROR             rtspclient
rtsp-client.c:1044:find_media: client 0x367a8130: can't prepare media
0:00:05.579126456  4495     0x36622630 ERROR             rtspclient
rtsp-client.c:2898:handle_describe_request: client 0x367a8130: no media



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