gstreamer h264 udp stream from haivision not being displayed

[Nicolas Dufresne]

Le jeu. 7 févr. 2019 05 h 58, Damian Dixon <damian.dixon at gmail.com> a
écrit :

> Hi,
>
> I've not used gstreamer before and I am thus struggling with displaying a
> video stream from a 'Makito X Encoder'.
>
> The endpoint is on my local network and has the form:
>
>     udp://@239.256.0.1:2000
>
> The video is H264. The transport stream is set to MPEG2 transport stream
> over UDP (no RTP header).
>
> I can display the video stream reliably using VLC and QtAV.
>
> I have tried the following command:
>
>     gst-launch-1.0 uridecodebin uri=udp://@239.255.0.1:2000 ! tsdemux !
> h264parse ! video/x-h264 ! avdec_h264 ! autovideosink sync=false
>

The error below is obscure, but my impression is that you need a
videoscaler to adapt the non-square pixel aspect ratio for your display.
You could try with a scaling display like xvimagesink or glimagesink too,
it's a bit of a guess. I believe we have used the makito that way before,
even though we usually use SRT. From the output, it would seem that the
mpeg take part is working.


> However the command exits and I get the following output on the console
> (GST_DEBUG=2).
>
>     Setting pipeline to PAUSED ...
>     Pipeline is live and does not need PREROLL ...
>     Got context from element 'autovideosink0-actual-sink-vaapi':
> gst.vaapi.Display=context,
> gst.vaapi.Display=(GstVaapiDisplay)"\(GstVaapiDisplayGLX\)\
> vaapidisplayglx1";
>     Setting pipeline to PLAYING ...
>     New clock: GstSystemClock
>     0:00:00.660459332 25954 0x7f0ef407d720 WARN               h264parse
> gsth264parse.c:1237:gst_h264_parse_handle_frame:<h264parse1> broken/invalid
> nal Type: 1 Slice, Size: 3890 will be dropped
>     0:00:00.709177326 25954 0x7f0ef407d720 WARN               h264parse
> gsth264parse.c:1237:gst_h264_parse_handle_frame:<h264parse1> broken/invalid
> nal Type: 1 Slice, Size: 2722 will be dropped
>     0:00:00.740623161 25954 0x7f0ef407d720 WARN               h264parse
> gsth264parse.c:1237:gst_h264_parse_handle_frame:<h264parse1> broken/invalid
> nal Type: 1 Slice, Size: 3441 will be dropped
>     0:00:00.741811344 25954 0x7f0ef407d720 WARN           basetransform
> gstbasetransform.c:1355:gst_base_transform_setcaps:<capsfilter1> transform
> could not transform video/x-h264, stream-format=(string)byte-stream,
> alignment=(string)nal, pixel-aspect-ratio=(fraction)16/15, width=(int)720,
> height=(int)576, framerate=(fraction)25/1,
> interlace-mode=(string)progressive, chroma-format=(string)4:2:0,
> bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true,
> profile=(string)baseline, level=(string)3 in anything we support
>     0:00:00.742489891 25954 0x7f0ef407d720 WARN           basetransform
> gstbasetransform.c:1355:gst_base_transform_setcaps:<capsfilter1> transform
> could not transform video/x-h264, stream-format=(string)byte-stream,
> alignment=(string)nal, pixel-aspect-ratio=(fraction)16/15, width=(int)720,
> height=(int)576, framerate=(fraction)25/1,
> interlace-mode=(string)progressive, chroma-format=(string)4:2:0,
> bit-depth-luma=(uint)8, bit-depth-chroma=(uint)8, parsed=(boolean)true,
> profile=(string)baseline, level=(string)3 in anything we support
>     0:00:00.788831498 25954 0x55eda7982b70 WARN                 basesrc
> gstbasesrc.c:3055:gst_base_src_loop:<source> error: Internal data stream
> error.
>     0:00:00.788900888 25954 0x55eda7982b70 WARN                 basesrc
> gstbasesrc.c:3055:gst_base_src_loop:<source> error: streaming stopped,
> reason not-negotiated (-4)
>     ERROR: from element
> /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstUDPSrc:source:
> Internal data stream error.
>     Additional debug info:
>     gstbasesrc.c(3055): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstURIDecodeBin:uridecodebin0/GstUDPSrc:source:
>     streaming stopped, reason not-negotiated (-4)
>     Execution ended after 0:00:00.302233500
>     Setting pipeline to PAUSED ...
>     Setting pipeline to READY ...
>     Setting pipeline to NULL ...
>     Freeing pipeline ...
>
> I can display a local video file so I am fairly sure I've built gstreamer
> correctly.
>
> How can I display the video stream reliably?
>
> I'm using gstreamer version 1.14.2.
>
> Thanks
> Damian
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