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

[Nicolas Dufresne]

Le jeu. 20 juin 2019 04 h 55, santhku1 <santhosh at eilabs.co.in> a écrit :

> 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 " ")");
>


You are asking explicitly to send raw video to rtph264pay (which expects
h264 encoded stream). There is raw video payloader in RTP, but I suspect
you'll need an encoder.

There is not mainline Linux support yet for this, on NXP vendor kernel,
please refer to NXP documentation on how to use their encoder.


>
> 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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