README updates

README.md

@@ -2,7 +2,7 @@
 
 ### **Now developed at the GitHub site <https://github.com/FDH2/UxPlay> (where ALL user issues should be posted, and latest versions can be found).**
 
--  **NEW in v1.73** (November 2025):
+-  **NEW in v1.73** (January 2026):
 
 -   Some YouTube app HLS videos now offer alternative language tracks (generated by AI dubbing).  Language choices will be made in order of
     preferences set with option -lang (or by environment variable $LANGUAGE, which "-lang"  overrides). Format is `-lang fr:es:en`, where French ("fr") is
@@ -23,7 +23,8 @@
     transmits rtp packets of decrypted h264 or h265 video to
     an external renderer (e.g. OBS Studio) at an address specified in `rest-of-pipeline`.
     Similarly, `-artp <rest-of-pipeline>` forwards decoded audio as L16 RTP packets.
-    Both options can be used together to forward video and audio (as separate concurrent streams) to external applications.
+    Both options can be used together to forward video and audio (as separate concurrent streams) to external
+    applications. See [Usage](#usage) for more details and sample Gstreamer receiver pipelines.
     
 -   (for Linux/*BSD Desktop Environments using D-Bus). New option `-scrsv <n>` provides screensaver inhibition (e.g., to
     prevent screensaver function while watching mirrored videos without keyboard or mouse
@@ -1319,12 +1320,38 @@ superior-quality ALAC Apple Lossless audio in Airplay audio-only mode.
 **-vrtp *pipeline***:  forward rtp packets of decrypted video to somewhere else, without rendering.
 Uses rtph264pay or rtph265pay as appropriate: *pipeline* should start with any
 rtph26xpay options (such as config_interval= or aggregate-mode =), followed by
-a sending method:  *e.g.*, `"config-interval=1 ! udpsink host=127.0.0.1 port=5000`".
+a sending method:  *e.g.*, `"config-interval=1 ! udpsink host=127.0.0.1 port=XXXX`".
+A gstreamer-based test receiver is
 
-**-artp *pipeline***:  forward decoded audio as L16 RTP packets to somewhere else, without local playback.
+```
+gst-launch-1.0 -v \
+udpsrc port=XXXX \
+! 'application/x-rtp, media=video, clock-rate=90000, encoding-name=H264, payload=96' \
+! rtph264depay   ! h264parse   ! decodebin   ! videoconvert   !
+autovideosink sync=false 
+
+_(Replace XXXX by the port you will use: make sure it is not blocked by a firewall; replace "264" by "265" if you are
+streaming h265 video)._ 
+```
+
+* To use the -vrtp option with with OBS-studio, install the [obs-gstreamer](https://github.com/fzwoch/obs-gstreamer) plugin; after the
+plugin installation,
+the "+" icon in the OBS-studio "Sources" window will show an entry "GStreamer Source" where you should add  the gstreamer decoder pipeline
+"``udpsrc port=XXXX ! application/x-rtp,media=video,encoding-name=H264,payload=96 ! rtph264depay ! decodebin ! videoconvert ! video.``".
+
+**-artp *pipeline***:  forward decoded audio as L16 RTP packets (PCM format S16BE)  to somewhere else, without rendering.
 Uses rtpL16pay (16-bit signed big-endian PCM, 44100Hz stereo): *pipeline* should start with any
-rtpL16pay options (such as pt=), followed by a sending method:
+rtpL16pay options (such as pt=96), followed by a sending method:
 *e.g.*, `"pt=96 ! udpsink host=127.0.0.1 port=5002"`.  iOS volume control still works over RTP.
+A gstreamer-based test receiver that plays the stream is
+
+```
+gst-launch-1.0 -v \
+udpsrc port=5002 \
+! application/x-rtp, media=audio, payload=96, clock-rate=44100, encoding-name=L16, format=S16BE, channels=2 \
+! rtpL16depay ! audioconvert !
+autoaudiosink sync=false
+```
 
 **-v4l2** Video settings for hardware h264 video decoding in the GPU by
 Video4Linux2. Equivalent to `-vd v4l2h264dec -vc v4l2convert`.
@@ -1345,17 +1372,6 @@ release: it only occurs in Linux and \*BSD.
 Linux and *BSD, but may be useless on Raspberry Pi, and may be unwanted,
 as it adds extra processing load.
 
-**-rpi** Equivalent to "-v4l2" (Not valid for Raspberry Pi model 5, and
-removed in UxPlay 1.67)
-
-**-rpigl** Equivalent to "-rpi -vs glimagesink". (Removed since UxPlay
-1.67)
-
-**-rpifb** Equivalent to "-rpi -vs kmssink" (Removed since UxPlay 1.67)
-
-**-rpiwl** Equivalent to "-rpi -vs waylandsink". (Removed since UxPlay
-1.67)
-
 **-as *audiosink*** chooses the GStreamer audiosink, instead of letting
 autoaudiosink pick it for you. Some audiosink choices are: pulsesink,
 alsasink, pipewiresink, osssink, oss4sink, jackaudiosink, osxaudiosink
@@ -1950,7 +1966,7 @@ introduced 2017, running tvOS 12.2.1), so it does not seem to matter
 what version UxPlay claims to be.
 
 # Changelog
-1.73 2025-11-10 Render Audio cover-art inside UxPlay with -ca option (no file
+1.73 2026-01-25 Render Audio cover-art inside UxPlay with -ca option (no file
 specified). (D-Bus based) option -scrsv <n> to inhibit screensaver while UxPlay
 is running (Linux/*BSD only). Add password support (-pw)  using a displayed
 pin code as a password that changes every time (and not as a one-time