adding in simple mux record that works for test srcs

record_mux.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+rm -rf mux.mp4
+
+gst-launch-1.0 alsasrc ! voaacenc ! queue ! mux. \
+    v4l2src ! video/x-raw,width=640,height=480,framerate=30/1 ! \
+    x264enc ! h264parse ! \
+    mp4mux name=mux ! \
+    filesink location="mux.mp4"

simple_test_record_to_file.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+
+gst-launch-1.0 -e videotestsrc ! x264enc ! mp4mux name=mux ! filesink location="bla.mp4"  audiotestsrc ! lamemp3enc ! mux.