Anything to uncompressed stream

[dim111]

I'm trying to create an uncompressed stream (for example, with testgrid) in order to open it on the same computer:
uv -t testgrid 10.0.0.98

10.0.0.98 - Microsoft LoopBack adapter

Then I try to open it in VLC:
udp://10.0.0.98:5004

VLC thinks for a long time, but nothing happens. What am I doing wrong?
Thanks.

[MartinPulec]

This is not possible to do it like this now. There are basically these points:

1. signalization - uncompressed video (RFC 4175) AFAIK requires explicit signalization (usually SDP), which would require use of eg. RTSP (or providing SDP file otherwise)
2. packet format - UltraGrid supports only RFC-compliant packet formats for JPEG and H.264 (using --video-protocol RTSP|SDP is required)

What do you want to achieve? The point 1 can be avoided by using JPEG (JPEG doesn't need to be signalized, it has registered RTP packet type), eg.:

uv -t testcard --video-protocol SDP -c libavcodec:subsampling=420 127.0.0.1
ffplay rtp://127.0.0.1:5004

Anyways, I didn't manage to persuade VLC to consume that stream. In theory, RFC-compliant uncompressed video could be implemented but I doubt it would be useful.