GStreamer preview RTMP using xvimage

I want to preview RTMP using gstreamer xvimagesink. i can see the output if i use autovideosink like this:

gst-launch-1.0 -v rtmpsrc location='rtmp://127.0.0.1:1935/live/stream' ! decodebin3 ! autovideosink

but if i replace "autovideosink" with "xvimagesink" i get this:

Setting pipeline to PAUSED ...
ERROR: Pipeline doesn't want to pause.
ERROR: from element /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0: Could not initialise Xv output
Additional debug info:
xvimagesink.c(1773): gst_xv_image_sink_open (): /GstPipeline:pipeline0/GstXvImageSink:xvimagesink0:
Could not open display (null)
Setting pipeline to NULL ...
Freeing pipeline ...

Solution

Both decodebin3 and autovideosink are auto-plugging GStreamer elements. It means that both elements are auto-selecting available and the most appropriate GStreamer plugins to demux/decode (decodebin3) and render video (autovideosink) from, in this case, live RTMP stream.

So it is very possible that, for example,

decodebin3 decodes video in format that xvimagesink cannot show on your platform/hardware and/or with your Gstreamer version,
xvimagesink is not set properly on your platform and it is not related with available display/monitor.

To find out more details about

video format decoded by decodebin3
video sink element "chosen" by autovideosink,

you can set higher (more detailed) debug level of GStreamer with, for example, export GST_DEBUG=3, rerun pipeline and inspect output.