diff --git a/docs/gst_plugins_cache.json b/docs/gst_plugins_cache.json
index b7cb6b59e9..1b71ccfe3d 100644
--- a/docs/gst_plugins_cache.json
+++ b/docs/gst_plugins_cache.json
@@ -39,26 +39,35 @@
                 "properties": {
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "timeline": {
                         "blurb": "Timeline to use in this src.",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GESTimeline",
                         "writable": true
@@ -126,26 +135,35 @@
                 "properties": {
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "timeline": {
                         "blurb": "Timeline to use in this src.",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GESTimeline",
                         "writable": true
@@ -219,120 +237,156 @@
                 "properties": {
                     "active": {
                         "blurb": "Use this object in the NleComposition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "caps": {
                         "blurb": "Caps used to filter/choose the output stream",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "ANY",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                     },
                     "duration": {
                         "blurb": "Outgoing duration (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                     },
                     "expandable": {
                         "blurb": "Expand to the full duration of the container composition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "id": {
                         "blurb": "The stream-id of the composition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "NULL",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true
                     },
                     "inpoint": {
                         "blurb": "The media start position (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "media-duration-factor": {
                         "blurb": "The relative rate caused by this object",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "0.01",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "priority": {
                         "blurb": "The priority of the object (0 = highest priority)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "-1",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                     },
                     "start": {
                         "blurb": "The start position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "stop": {
                         "blurb": "The stop position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": false
@@ -395,122 +449,158 @@
                 "properties": {
                     "active": {
                         "blurb": "Use this object in the NleComposition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "caps": {
                         "blurb": "Caps used to filter/choose the output stream",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "ANY",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                     },
                     "duration": {
                         "blurb": "Outgoing duration (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                     },
                     "expandable": {
                         "blurb": "Expand to the full duration of the container composition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "inpoint": {
                         "blurb": "The media start position (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "media-duration-factor": {
                         "blurb": "The relative rate caused by this object",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "0.01",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "priority": {
                         "blurb": "The priority of the object (0 = highest priority)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "-1",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                     },
                     "sinks": {
                         "blurb": "Number of input sinks (-1 for automatic handling)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "1",
                         "max": "2147483647",
                         "min": "-1",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gint",
                         "writable": true
                     },
                     "start": {
                         "blurb": "The start position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "stop": {
                         "blurb": "The stop position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": false
@@ -572,111 +662,144 @@
                 "properties": {
                     "active": {
                         "blurb": "Use this object in the NleComposition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "caps": {
                         "blurb": "Caps used to filter/choose the output stream",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "ANY",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                     },
                     "duration": {
                         "blurb": "Outgoing duration (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                     },
                     "expandable": {
                         "blurb": "Expand to the full duration of the container composition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "inpoint": {
                         "blurb": "The media start position (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "media-duration-factor": {
                         "blurb": "The relative rate caused by this object",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "0.01",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "priority": {
                         "blurb": "The priority of the object (0 = highest priority)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "-1",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                     },
                     "start": {
                         "blurb": "The start position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "stop": {
                         "blurb": "The stop position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": false
@@ -725,120 +848,156 @@
                 "properties": {
                     "active": {
                         "blurb": "Use this object in the NleComposition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "async-handling": {
                         "blurb": "The bin will handle Asynchronous state changes",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "true",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "caps": {
                         "blurb": "Caps used to filter/choose the output stream",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "ANY",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "GstCaps",
                         "writable": true
                     },
                     "duration": {
                         "blurb": "Outgoing duration (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "9223372036854775807",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gint64",
                         "writable": true
                     },
                     "expandable": {
                         "blurb": "Expand to the full duration of the container composition",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "inpoint": {
                         "blurb": "The media start position (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "18446744073709551615",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "media-duration-factor": {
                         "blurb": "The relative rate caused by this object",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "1",
                         "max": "1.79769e+308",
                         "min": "0.01",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gdouble",
                         "writable": true
                     },
                     "message-forward": {
                         "blurb": "Forwards all children messages",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "false",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gboolean",
                         "writable": true
                     },
                     "priority": {
                         "blurb": "The priority of the object (0 = highest priority)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "-1",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint",
                         "writable": true
                     },
                     "start": {
                         "blurb": "The start position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": true
                     },
                     "stop": {
                         "blurb": "The stop position relative to the parent (in nanoseconds)",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "0",
                         "max": "18446744073709551615",
                         "min": "0",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "guint64",
                         "writable": false
                     },
                     "uri": {
                         "blurb": "Uri of the file to use",
+                        "conditionally-available": false,
                         "construct": false,
                         "construct-only": false,
+                        "controllable": false,
                         "default": "NULL",
+                        "mutable": "playing",
                         "readable": true,
                         "type": "gchararray",
                         "writable": true