[Bug 794400] New: Issues when using rtspclientsink when using v4l2h264enc on Dragonboard 410c

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=794400

            Bug ID: 794400
           Summary: Issues when using rtspclientsink when using
                    v4l2h264enc on Dragonboard 410c
    Classification: Platform
           Product: GStreamer
           Version: 1.12.2
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: rob.gries at egwtech.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

It seems that when using the v4l2h264enc element with the rtspclientsink has a
few issues when using the Dragonboard 410c's video encoder.

Basically I cannot seem to get the board to start delivering a stream to a
remote server running on Wowza's Video Cloud service using the following
pipeline:
gst-launch-1.0 -v v4l2src device=/dev/video3 !
video/x-raw,format=NV12,width=1280,height=720,framerate=30/1 ! v4l2h264enc
extra-controls="controls,h264_profile=4,video_bitrate=20000
00;" ! video/x-h264,profile=main,level=4,stream-format=byte-stream,alignment=au
! rtspclientsink
location=rtsp://<snipped>.entrypoint.cloud.wowza.com/app-<snipped>:1935
Setting pipeline to PAUSED ... 
Pipeline is live and does not need PREROLL ...
Progress: (open) Opening Stream
Progress: (connect) Connecting to
rtsp://<snipped>.entrypoint.cloud.wowza.com/app-<snipped>:1935
/GstPipeline:pipeline0/GstV4l2Src:v4l2src0.GstPad:src: caps = video/x-raw,
format=(string)NV12, width=(int)1280, height=(int)720,
framerate=(fraction)30/1, interlace-mode=(string)progressive,
colorimetry=(string)1:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps =
video/x-raw, format=(string)NV12, width=(int)1280, height=(int)720,
framerate=(fraction)30/1, interlace-mode=(string)progressive,
colorimetry=(string)1:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/v4l2h264enc:v4l2h264enc0.GstPad:src: caps =
video/x-h264, stream-format=(string)byte-stream, alignment=(string)au,
profile=(string)main, level=(string)1, width=(int)1280, height=(int)720,
pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1,
interlace-mode=(string)progressive, colorimetry=(string)1:4:7:1
Redistribute latency...
/GstPipeline:pipeline0/v4l2h264enc:v4l2h264enc0.GstPad:sink: caps =
video/x-raw, format=(string)NV12, width=(int)1280, height=(int)720,
framerate=(fraction)30/1, interlace-mode=(string)progressive,
colorimetry=(string)1:4:7:1, pixel-aspect-ratio=(fraction)1/1
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:sink: caps =
video/x-raw, format=(string)NV12, width=(int)1280, height=(int)720,
framerate=(fraction)30/1, interlace-mode=(string)progressive,
colorimetry=(string)1:4:7:1, pixel-aspect-ratio=(fraction)1/1
ERROR: from element /GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0:
Could not open resource for reading and writing.
Additional debug info:
../../../gst-rtsp-server-1.12.2/gst/rtsp-sink/gstrtspclientsink.c(2924):
gst_rtsp_client_sink_connect_to_server ():
/GstPipeline:pipeline0/GstRTSPClientSink:rtspclientsink0:
Failed to connect. (Generic error)
ERROR: pipeline doesn't want to preroll.
Setting pipeline to PAUSED ... 
Setting pipeline to READY ...  
Setting pipeline to NULL ...   
Freeing pipeline ...

Recommended reproduction steps:
1. Sign up for a Wowza Video Cloud trial -
https://www.wowza.com/pricing/cloud-free-trial
2. Bring up a Dragonboard 410c and camera (I use an OV5640 on a mezzanine)
running the kernel mentioned in this post (or the current 18.01 release) 
3. Install GStreamer 1.12.2 and gstrtspserver
4. Set up a cloud video endpoint -
https://www.wowza.com/docs/getting-started-with-wowza-streaming-cloud (I used
the other RTSP option to setup streaming)
5. Attempt streaming using the pipeline referenced above 

Some information about my setup:
Kernel Version: 4.14.15 (Link to repo:
https://github.com/RobGries/96b_4.14_kernel)
Device: Dragonboard 410c
GStreamer-1.0 version: GStreamer Core Library version 1.12.2

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