diff --git a/pinos/client/serialize.c b/pinos/client/serialize.c
index b56b07ff1..35719f91b 100644
--- a/pinos/client/serialize.c
+++ b/pinos/client/serialize.c
@@ -205,131 +205,30 @@ pinos_serialize_port_info_copy_into (void *dest, const SpaPortInfo *info)
 size_t
 pinos_serialize_props_get_size (const SpaProps *props)
 {
-  size_t len;
-  unsigned int i, j;
-  SpaPropInfo *pi;
-  SpaPropRangeInfo *ri;
-
   if (props == NULL)
     return 0;
 
-  len = sizeof (SpaProps);
-  for (i = 0; i < props->n_prop_info; i++) {
-    pi = (SpaPropInfo *) &props->prop_info[i];
-    len += sizeof (SpaPropInfo);
-    len += pi->name ? strlen (pi->name) + 1 : 0;
-    /* for the value */
-    len += pi->maxsize;
-    for (j = 0; j < pi->n_range_values; j++) {
-      ri = (SpaPropRangeInfo *)&pi->range_values[j];
-      len += sizeof (SpaPropRangeInfo);
-      len += ri->name ? strlen (ri->name) + 1 : 0;
-      /* the size of the range value */
-      len += ri->val.size;
-    }
-  }
-  return len;
+  return SPA_POD_SIZE (props);
 }
 
 size_t
 pinos_serialize_props_serialize (void *p, const SpaProps *props)
 {
-  size_t len, slen;
-  unsigned int i, j, c;
-  SpaProps *tp;
-  SpaPropInfo *pi;
-  SpaPropRangeInfo *ri;
+  size_t size;
 
   if (props == NULL)
     return 0;
 
-  tp = p;
-  memcpy (tp, props, sizeof (SpaProps));
-  pi = SPA_MEMBER (tp, sizeof(SpaProps), SpaPropInfo);
-  ri = SPA_MEMBER (pi, sizeof(SpaPropInfo) * tp->n_prop_info, SpaPropRangeInfo);
+  size = SPA_POD_SIZE (props);
+  memcpy (p, props, size);
 
-  tp->prop_info = SPA_INT_TO_PTR (SPA_PTRDIFF (pi, tp));
-
-  /* write propinfo array */
-  for (i = 0, c = 0; i < tp->n_prop_info; i++) {
-    memcpy (&pi[i], &props->prop_info[i], sizeof (SpaPropInfo));
-    pi[i].range_values = SPA_INT_TO_PTR (SPA_PTRDIFF (&ri[c], tp));
-    for (j = 0; j < pi[i].n_range_values; j++, c++) {
-      memcpy (&ri[c], &props->prop_info[i].range_values[j], sizeof (SpaPropRangeInfo));
-    }
-  }
-  p = &ri[c];
-  /* strings and default values from props and ranges */
-  for (i = 0, c = 0; i < tp->n_prop_info; i++) {
-    if (pi[i].name) {
-      slen = strlen (pi[i].name) + 1;
-      memcpy (p, pi[i].name, slen);
-      pi[i].name = SPA_INT_TO_PTR (SPA_PTRDIFF (p, tp));
-      p += slen;
-    } else {
-      pi[i].name = 0;
-    }
-    for (j = 0; j < pi[i].n_range_values; j++, c++) {
-      if (ri[c].name) {
-        slen = strlen (ri[c].name) + 1;
-        memcpy (p, ri[c].name, slen);
-        ri[c].name = SPA_INT_TO_PTR (SPA_PTRDIFF (p, tp));
-        p += slen;
-      } else {
-        ri[c].name = 0;
-      }
-      if (ri[c].val.size) {
-        memcpy (p, ri[c].val.value, ri[c].val.size);
-        ri[c].val.value = SPA_INT_TO_PTR (SPA_PTRDIFF (p, tp));
-        p += ri[c].val.size;
-      } else {
-        ri[c].val.value = 0;
-      }
-    }
-  }
-  /* and the actual values */
-  for (i = 0; i < tp->n_prop_info; i++) {
-    if (pi[i].offset) {
-      memcpy (p, SPA_MEMBER (props, pi[i].offset, void), pi[i].maxsize);
-      pi[i].offset = SPA_PTRDIFF (p, tp);
-      p += pi[i].maxsize;
-    } else {
-      pi[i].offset = 0;
-    }
-  }
-  len = SPA_PTRDIFF (p, tp);
-
-  return len;
+  return size;
 }
 
 SpaProps *
 pinos_serialize_props_deserialize (void *p, off_t offset)
 {
-  SpaProps *tp;
-  unsigned int i, j;
-  SpaPropInfo *pi;
-  SpaPropRangeInfo *ri;
-
-  tp = SPA_MEMBER (p, offset, SpaProps);
-  if (tp->prop_info)
-    tp->prop_info = SPA_MEMBER (tp, SPA_PTR_TO_INT (tp->prop_info), SpaPropInfo);
-  /* now fix all the pointers */
-  for (i = 0; i < tp->n_prop_info; i++) {
-    pi = (SpaPropInfo *) &tp->prop_info[i];
-    if (pi->name)
-      pi->name = SPA_MEMBER (tp, SPA_PTR_TO_INT (pi->name), char);
-    if (pi->range_values)
-      pi->range_values = SPA_MEMBER (tp, SPA_PTR_TO_INT (pi->range_values), SpaPropRangeInfo);
-
-    for (j = 0; j < pi->n_range_values; j++) {
-      ri = (SpaPropRangeInfo *) &pi->range_values[j];
-      if (ri->name)
-        ri->name = SPA_MEMBER (tp, SPA_PTR_TO_INT (ri->name), char);
-      if (ri->val.value)
-        ri->val.value = SPA_MEMBER (tp, SPA_PTR_TO_INT (ri->val.value), void);
-    }
-  }
-  return tp;
+  return SPA_MEMBER (p, offset, SpaProps);
 }
 
 SpaProps *
diff --git a/pinos/gst/gstpinosformat.c b/pinos/gst/gstpinosformat.c
index 1c21dc38d..c4cfdd84c 100644
--- a/pinos/gst/gstpinosformat.c
+++ b/pinos/gst/gstpinosformat.c
@@ -443,14 +443,18 @@ GstCaps *
 gst_caps_from_format (const SpaFormat *format)
 {
   GstCaps *res = NULL;
+  uint32_t media_type, media_subtype;
 
-  if (format->body.media_type == SPA_MEDIA_TYPE_VIDEO) {
+  media_type = format->body.media_type.value;
+  media_subtype = format->body.media_subtype.value;
+
+  if (media_type == SPA_MEDIA_TYPE_VIDEO) {
     SpaVideoInfo f;
 
     if (spa_format_video_parse (format, &f) < 0)
       return NULL;
 
-    if (format->body.media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
+    if (media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
       res = gst_caps_new_simple ("video/x-raw",
           "format", G_TYPE_STRING, gst_video_format_to_string (f.info.raw.format),
           "width", G_TYPE_INT, f.info.raw.size.width,
@@ -458,14 +462,14 @@ gst_caps_from_format (const SpaFormat *format)
           "framerate", GST_TYPE_FRACTION, f.info.raw.framerate.num, f.info.raw.framerate.denom,
           NULL);
     }
-    else if (format->body.media_subtype == SPA_MEDIA_SUBTYPE_MJPG) {
+    else if (media_subtype == SPA_MEDIA_SUBTYPE_MJPG) {
       res = gst_caps_new_simple ("image/jpeg",
           "width", G_TYPE_INT, f.info.mjpg.size.width,
           "height", G_TYPE_INT, f.info.mjpg.size.height,
           "framerate", GST_TYPE_FRACTION, f.info.mjpg.framerate.num, f.info.mjpg.framerate.denom,
           NULL);
     }
-    else if (format->body.media_subtype == SPA_MEDIA_SUBTYPE_H264) {
+    else if (media_subtype == SPA_MEDIA_SUBTYPE_H264) {
       res = gst_caps_new_simple ("video/x-h264",
           "width", G_TYPE_INT, f.info.h264.size.width,
           "height", G_TYPE_INT, f.info.h264.size.height,
@@ -474,13 +478,13 @@ gst_caps_from_format (const SpaFormat *format)
           "alignment", G_TYPE_STRING, "au",
           NULL);
     }
-  } else if (format->body.media_type == SPA_MEDIA_TYPE_AUDIO) {
+  } else if (media_type == SPA_MEDIA_TYPE_AUDIO) {
     SpaAudioInfo f;
 
     if (spa_format_audio_parse (format, &f) < 0)
       return NULL;
 
-    if (format->body.media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
+    if (media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
       res = gst_caps_new_simple ("audio/x-raw",
           "format", G_TYPE_STRING, gst_audio_format_to_string (f.info.raw.format),
           "layout", G_TYPE_STRING, "interleaved",
diff --git a/pinos/modules/spa/module.c b/pinos/modules/spa/module.c
index bf7eb32f6..91dea1f68 100644
--- a/pinos/modules/spa/module.c
+++ b/pinos/modules/spa/module.c
@@ -34,7 +34,7 @@ static SpaResult
 setup_video_node (SpaNode *spa_node, PinosProperties *pinos_props) {
   SpaResult res;
   SpaProps *props;
-  SpaPropValue value;
+//  SpaPropValue value;
   const char *pattern;
   uint32_t pattern_int;
 
@@ -49,15 +49,15 @@ setup_video_node (SpaNode *spa_node, PinosProperties *pinos_props) {
     return SPA_RESULT_ERROR;
   }
 
-  value.value = &pattern_int;
-  value.size = sizeof(uint32_t);
+////  value.value = &pattern_int;
+//  value.size = sizeof(uint32_t);
 
   if ((res = spa_node_get_props (spa_node, &props)) != SPA_RESULT_OK) {
     pinos_log_debug ("spa_node_get_props failed: %d", res);
     return SPA_RESULT_ERROR;
   }
 
-  spa_props_set_value (props, spa_props_index_for_name (props, "pattern"), &value);
+//  spa_props_set_value (props, spa_props_index_for_name (props, "pattern"), &value);
 
   if ((res = spa_node_set_props (spa_node, props)) != SPA_RESULT_OK) {
     pinos_log_debug ("spa_node_set_props failed: %d", res);
diff --git a/spa/include/spa/format-builder.h b/spa/include/spa/format-builder.h
index 5c6f29b82..d0f2d0afb 100644
--- a/spa/include/spa/format-builder.h
+++ b/spa/include/spa/format-builder.h
@@ -35,9 +35,10 @@ spa_pod_builder_push_format (SpaPODBuilder *builder,
                              uint32_t       media_type,
                              uint32_t       media_subtype)
 {
-  const SpaFormat p = { { sizeof (SpaFormatBody), SPA_POD_TYPE_FORMAT },
-                        { media_type, media_subtype } };
-  return spa_pod_builder_push (builder, frame, &p.pod,
+  const SpaFormat p = { { { sizeof (SpaPODObjectBody) + sizeof (SpaFormatBody), SPA_POD_TYPE_OBJECT }, { 0, 0 } },
+                      { { { sizeof (uint32_t), SPA_POD_TYPE_INT }, media_type },
+                        { { sizeof (uint32_t), SPA_POD_TYPE_INT }, media_subtype } } };
+  return spa_pod_builder_push (builder, frame, &p.obj.pod,
                                spa_pod_builder_raw (builder, &p, sizeof(p), false));
 }
 
diff --git a/spa/include/spa/format.h b/spa/include/spa/format.h
index 0474d4817..aa8f1cbc8 100644
--- a/spa/include/spa/format.h
+++ b/spa/include/spa/format.h
@@ -90,8 +90,8 @@ typedef enum {
 } SpaFormatProps;
 
 typedef struct {
-  uint32_t      media_type;
-  uint32_t      media_subtype;
+  SpaPODInt     media_type;
+  SpaPODInt     media_subtype;
   /* contents follow, series of SpaPODProp */
 } SpaFormatBody;
 
@@ -102,7 +102,7 @@ typedef struct {
  * @pod: POD object with properties
  */
 struct _SpaFormat {
-  SpaPOD        pod;
+  SpaPODObject  obj;
   SpaFormatBody body;
 };
 
@@ -115,7 +115,7 @@ static inline SpaPODProp *
 spa_format_find_prop (const SpaFormat *format, uint32_t key)
 {
   SpaPODProp *res;
-  SPA_POD_FOREACH (format, res) {
+  SPA_FORMAT_BODY_FOREACH (&format->body, SPA_POD_BODY_SIZE (format), res) {
     if (res->pod.type == SPA_POD_TYPE_PROP && res->body.key == key)
       return res;
   }
diff --git a/spa/include/spa/pod.h b/spa/include/spa/pod.h
index e24e96e1a..155e4ebda 100644
--- a/spa/include/spa/pod.h
+++ b/spa/include/spa/pod.h
@@ -47,8 +47,7 @@ typedef enum {
   SPA_POD_TYPE_STRUCT,
   SPA_POD_TYPE_OBJECT,
   SPA_POD_TYPE_PROP,
-  SPA_POD_TYPE_BYTES,
-  SPA_POD_TYPE_FORMAT
+  SPA_POD_TYPE_BYTES
 } SpaPODType;
 
 typedef struct {
diff --git a/spa/include/spa/props.h b/spa/include/spa/props.h
index 357a5bf2a..d14768a05 100644
--- a/spa/include/spa/props.h
+++ b/spa/include/spa/props.h
@@ -24,167 +24,39 @@
 extern "C" {
 #endif
 
-typedef struct _SpaProps SpaProps;
+#include <spa/pod.h>
+#include <spa/pod-builder.h>
+
+typedef SpaPODObject SpaProps;
 
 #define SPA_PROPS_URI             "http://spaplug.in/ns/props"
 #define SPA_PROPS_PREFIX          SPA_PROPS_URI "#"
 
-#include <string.h>
-#include <spa/defs.h>
-#include <spa/dict.h>
 
-/**
- * SpaPropType:
- */
-typedef enum {
-  SPA_PROP_TYPE_INVALID         = 0,
-  SPA_PROP_TYPE_BOOL,
-  SPA_PROP_TYPE_INT8,
-  SPA_PROP_TYPE_UINT8,
-  SPA_PROP_TYPE_INT16,
-  SPA_PROP_TYPE_UINT16,
-  SPA_PROP_TYPE_INT32,
-  SPA_PROP_TYPE_UINT32,
-  SPA_PROP_TYPE_INT64,
-  SPA_PROP_TYPE_UINT64,
-  SPA_PROP_TYPE_INT,
-  SPA_PROP_TYPE_UINT,
-  SPA_PROP_TYPE_FLOAT,
-  SPA_PROP_TYPE_DOUBLE,
-  SPA_PROP_TYPE_STRING,
-  SPA_PROP_TYPE_RECTANGLE,
-  SPA_PROP_TYPE_FRACTION,
-  SPA_PROP_TYPE_BITMASK,
-  SPA_PROP_TYPE_POINTER
-} SpaPropType;
-
-/**
- * SpaPropFlags:
- * @SPA_PROP_FLAG_NONE: no flags
- * @SPA_PROP_FLAG_OPTIONAL: the value can be left unset
- * @SPA_PROP_FLAG_READABLE: property is readable
- * @SPA_PROP_FLAG_WRITABLE: property is writable
- * @SPA_PROP_FLAG_READWRITE: property is readable and writable
- * @SPA_PROP_FLAG_DEPRECATED: property is deprecated and should not be used
- * @SPA_PROP_FLAG_INFO: property is to get/set the complete structure
- */
-typedef enum {
-  SPA_PROP_FLAG_NONE            = 0,
-  SPA_PROP_FLAG_OPTIONAL        = (1 << 0),
-  SPA_PROP_FLAG_READABLE        = (1 << 1),
-  SPA_PROP_FLAG_WRITABLE        = (1 << 2),
-  SPA_PROP_FLAG_READWRITE       = SPA_PROP_FLAG_READABLE | SPA_PROP_FLAG_WRITABLE,
-  SPA_PROP_FLAG_DEPRECATED      = (1 << 3),
-  SPA_PROP_FLAG_INFO            = (1 << 4),
-} SpaPropFlags;
-
-/* SpaPropRangeType:
- * @SPA_PROP_RANGE_TYPE_NONE: no range specified, full range of type applies
- * @SPA_PROP_RANGE_TYPE_MIN_MAX: range contains 2 values, min and max
- * @SPA_PROP_RANGE_TYPE_STEP: range contains 3 values, min, max and step
- * @SPA_PROP_RANGE_TYPE_ENUM: range contains enum of possible values
- * @SPA_PROP_RANGE_TYPE_FLAGS: range contains flags of possible values
- */
-typedef enum {
-  SPA_PROP_RANGE_TYPE_NONE      = 0,
-  SPA_PROP_RANGE_TYPE_MIN_MAX,
-  SPA_PROP_RANGE_TYPE_STEP,
-  SPA_PROP_RANGE_TYPE_ENUM,
-  SPA_PROP_RANGE_TYPE_FLAGS,
-} SpaPropRangeType;
-
-/**
- * SpaPropValue:
- * @size: the property size
- * @value: the property value.
- *
- * The structure to set and get properties.
- */
-typedef struct {
-  size_t       size;
-  const void  *value;
-} SpaPropValue;
-
-/**
- * SpaPropRangeInfo:
- * @name: name of this value
- * @val: the value
- */
-typedef struct {
-  const char    *name;
-  SpaPropValue   val;
-} SpaPropRangeInfo;
-
-/**
- * SpaPropInfo:
- * @id: unique id
- * @offset: offset in structure with data
- * @name: human readable name
- * @flags: property flags
- * @type: property type
- * @max_size: maximum size of property value
- * @range_type: type of the range values
- * @n_range_values: number of elements in @range_values
- * @range_values: array of possible values
- * @extra: extra info
- */
-typedef struct {
-  uint32_t                  id;
-  size_t                    offset;
-  const char               *name;
-  SpaPropFlags              flags;
-  SpaPropType               type;
-  size_t                    maxsize;
-  SpaPropRangeType          range_type;
-  unsigned int              n_range_values;
-  const SpaPropRangeInfo   *range_values;
-  SpaDict                  *extra;
-} SpaPropInfo;
-
-/**
- * SpaProps:
- * @n_prop_info: number of elements in @prop_info
- * @prop_info: array of #SpaPropInfo. Contains info about the
- *             properties. Can be %NULL when unspecified.
- * @unset_mask: mask of unset properties. For each property in @prop_info there
- *              is a corresponding bit that specifies if the property is currently
- *              unset. When more than 32 properties are present, more uint32_t
- *              fields follow this one.
- *
- * Generic propertiers.
- */
-struct _SpaProps {
-  unsigned int       n_prop_info;
-  const SpaPropInfo *prop_info;
-  uint32_t           unset_mask;
-};
-
-#define SPA_PROPS_INDEX_IS_UNSET(p,idx) ((&(p)->unset_mask)[(idx) >> 5] & (1U << ((idx) & 31)))
-#define SPA_PROPS_INDEX_UNSET(p,idx)    ((&(p)->unset_mask)[(idx) >> 5] |= (1U << ((idx) & 31)))
-#define SPA_PROPS_INDEX_SET(p,idx)      ((&(p)->unset_mask)[(idx) >> 5] &= ~(1U << ((idx) & 31)))
-
-static inline unsigned int
-spa_props_index_for_id (const SpaProps *props, uint32_t id)
+static inline off_t
+spa_pod_builder_push_props (SpaPODBuilder *builder,
+                            SpaPODFrame   *frame)
 {
-  unsigned int i;
-
-  for (i = 0; i < props->n_prop_info; i++) {
-     if (props->prop_info[i].id == id)
-       return i;
-  }
-  return SPA_IDX_INVALID;
+  return spa_pod_builder_push_object (builder, frame, 0, 0);
 }
 
-static inline unsigned int
-spa_props_index_for_name (const SpaProps *props, const char *name)
+static inline off_t
+spa_pod_builder_props (SpaPODBuilder *builder,
+                       uint32_t       propid, ...)
 {
-  unsigned int i;
+  SpaPODFrame f;
+  va_list args;
+  off_t off;
 
-  for (i = 0; i < props->n_prop_info; i++) {
-     if (strcmp (props->prop_info[i].name, name) == 0)
-       return i;
-  }
-  return SPA_IDX_INVALID;
+  off = spa_pod_builder_push_props (builder, &f);
+
+  va_start (args, propid);
+  spa_pod_builder_propv (builder, propid, args);
+  va_end (args);
+
+  spa_pod_builder_pop (builder, &f);
+
+  return off;
 }
 
 #ifdef __cplusplus
diff --git a/spa/lib/audio-raw.c b/spa/lib/audio-raw.c
index 3bdcefbf5..0a85cb3b4 100644
--- a/spa/lib/audio-raw.c
+++ b/spa/lib/audio-raw.c
@@ -60,10 +60,13 @@ spa_format_audio_parse (const SpaFormat *format,
   SpaPODProp *prop;
   const ParseInfo *pinfo, *find;
 
-  if (format->body.media_type != SPA_MEDIA_TYPE_AUDIO)
+  if (format->body.media_type.value != SPA_MEDIA_TYPE_AUDIO)
     return SPA_RESULT_INVALID_MEDIA_TYPE;
 
-  switch (format->body.media_subtype) {
+  info->media_type = format->body.media_type.value;
+  info->media_subtype = format->body.media_subtype.value;
+
+  switch (info->media_subtype) {
     case SPA_MEDIA_SUBTYPE_RAW:
       pinfo = raw_parse_info;
       break;
@@ -85,9 +88,6 @@ spa_format_audio_parse (const SpaFormat *format,
       return SPA_RESULT_INVALID_ARGUMENTS;
   }
 
-  info->media_type = format->body.media_type;
-  info->media_subtype = format->body.media_subtype;
-
   SPA_POD_FOREACH (format, prop) {
     if ((find = parse_info_find (pinfo, prop->body.key, prop->body.value.type))) {
       memcpy (SPA_MEMBER (info, find->offset, void),
diff --git a/spa/lib/debug.c b/spa/lib/debug.c
index 0b316116c..d00f52c17 100644
--- a/spa/lib/debug.c
+++ b/spa/lib/debug.c
@@ -227,6 +227,7 @@ spa_debug_dump_mem (const void *mem, size_t size)
 SpaResult
 spa_debug_props (const SpaProps *props, bool print_ranges)
 {
+  spa_debug_pod (&props->pod);
   return SPA_RESULT_OK;
 }
 
@@ -352,7 +353,7 @@ print_pod_value (uint32_t size, uint32_t type, void *body, int prefix)
       printf ("%-*sDouble %g\n", prefix, "", *(double *) body);
       break;
     case SPA_POD_TYPE_STRING:
-      printf ("%-*sString %s\n", prefix, "", (char *) body);
+      printf ("%-*sString \"%s\"\n", prefix, "", (char *) body);
       break;
     case SPA_POD_TYPE_RECTANGLE:
     {
@@ -419,17 +420,6 @@ print_pod_value (uint32_t size, uint32_t type, void *body, int prefix)
       }
       break;
     }
-    case SPA_POD_TYPE_FORMAT:
-    {
-      SpaFormatBody *b = body;
-      SpaPODProp *p;
-
-      printf ("%-*sFormat: size %d\n", prefix, "", size);
-      printf ("%-*s  Media Type: %d / %d\n", prefix, "", b->media_type, b->media_subtype);
-      SPA_FORMAT_BODY_FOREACH (b, size, p)
-        print_pod_value (p->pod.size, p->pod.type, SPA_POD_BODY (p), prefix + 6);
-      break;
-    }
   }
 }
 
@@ -491,16 +481,20 @@ spa_debug_format (const SpaFormat *format)
   const char *media_subtype;
   const char **prop_names;
   SpaPODProp *prop;
+  uint32_t mtype, mstype;
 
   if (format == NULL)
     return SPA_RESULT_INVALID_ARGUMENTS;
 
-  if (format->body.media_type > 0 && format->body.media_type < SPA_N_ELEMENTS (media_type_names)) {
-    media_type = media_type_names[format->body.media_type].name;
-    first = media_type_names[format->body.media_type].first;
-    last = media_type_names[format->body.media_type].last;
-    idx = media_type_names[format->body.media_type].idx;
-    prop_names = media_type_names[format->body.media_type].prop_names;
+  mtype = format->body.media_type.value;
+  mstype = format->body.media_subtype.value;
+
+  if (mtype > 0 && mtype < SPA_N_ELEMENTS (media_type_names)) {
+    media_type = media_type_names[mtype].name;
+    first = media_type_names[mtype].first;
+    last = media_type_names[mtype].last;
+    idx = media_type_names[mtype].idx;
+    prop_names = media_type_names[mtype].prop_names;
   }
   else {
     media_type = "unknown";
@@ -508,11 +502,11 @@ spa_debug_format (const SpaFormat *format)
     prop_names = NULL;
   }
 
-  if (format->body.media_subtype >= SPA_MEDIA_SUBTYPE_ANY_FIRST &&
-      format->body.media_subtype <= SPA_MEDIA_SUBTYPE_ANY_LAST) {
-    media_subtype = media_subtype_names[format->body.media_subtype].name;
-  } else if (format->body.media_subtype >= first && format->body.media_subtype <= last)
-    media_subtype = media_subtype_names[format->body.media_subtype - first + idx].name;
+  if (mstype >= SPA_MEDIA_SUBTYPE_ANY_FIRST &&
+      mstype <= SPA_MEDIA_SUBTYPE_ANY_LAST) {
+    media_subtype = media_subtype_names[mstype].name;
+  } else if (mstype >= first && mstype <= last)
+    media_subtype = media_subtype_names[mstype - first + idx].name;
   else
     media_subtype = "unknown";
 
diff --git a/spa/lib/meson.build b/spa/lib/meson.build
index 582bd4bd8..e88930e5d 100644
--- a/spa/lib/meson.build
+++ b/spa/lib/meson.build
@@ -1,7 +1,6 @@
 spalib_sources = ['audio-raw.c',
                   'debug.c',
                   'mapper.c',
-                  'props.c',
                   'video-raw.c']
 
 spalib = shared_library('spa-lib',
diff --git a/spa/lib/props.h b/spa/lib/props.h
index fdb7c79e7..a840258d8 100644
--- a/spa/lib/props.h
+++ b/spa/lib/props.h
@@ -26,42 +26,6 @@ extern "C" {
 
 #include <spa/props.h>
 
-/**
- * spa_props_set_value:
- * @props: a #SpaProps
- * @index: the index of the property in the prop_info array
- * @value: the value to set
- *
- * Sets @value in @prop. type should match the type specified
- * in the #SpaPropInfo at @index or else #SPA_RESULT_WRONG_PROPERTY_TYPE
- * is returned.
- *
- * Returns: #SPA_RESULT_OK on success.
- *          #SPA_RESULT_INVALID_PROPERTY_INDEX when @index is not valid
- *          #SPA_RESULT_WRONG_PROPERTY_TYPE when type is not correct
- */
-SpaResult       spa_props_set_value   (SpaProps           *props,
-                                       unsigned int        index,
-                                       const SpaPropValue *value);
-/**
- * spa_props_get_value:
- * @props: a #SpaProps
- * @index: the property index in the prop_info array
- * @value: a location for the type, size and value
- *
- * Get the size and value of the property at @index.
- *
- * Returns: #SPA_RESULT_OK on success.
- *          #SPA_RESULT_INVALID_PROPERTY_INDEX when @index is not valid
- *          #SPA_RESULT_PROPERTY_UNSET when no value has been set yet
- */
-SpaResult       spa_props_get_value   (const SpaProps     *props,
-                                       unsigned int        index,
-                                       SpaPropValue       *value);
-
-SpaResult       spa_props_copy_values (const SpaProps *src,
-                                       SpaProps       *dest);
-
 #ifdef __cplusplus
 }  /* extern "C" */
 #endif
diff --git a/spa/lib/video-raw.c b/spa/lib/video-raw.c
index be77240b8..fb97cbb42 100644
--- a/spa/lib/video-raw.c
+++ b/spa/lib/video-raw.c
@@ -85,10 +85,13 @@ spa_format_video_parse (const SpaFormat *format,
   SpaPODProp *prop;
   const ParseInfo *pinfo, *find;
 
-  if (format->body.media_type != SPA_MEDIA_TYPE_VIDEO)
+  if (format->body.media_type.value != SPA_MEDIA_TYPE_VIDEO)
     return SPA_RESULT_INVALID_MEDIA_TYPE;
 
-  switch (format->body.media_subtype) {
+  info->media_type = format->body.media_type.value;
+  info->media_subtype = format->body.media_subtype.value;
+
+  switch (info->media_subtype) {
     case SPA_MEDIA_SUBTYPE_RAW:
       pinfo = raw_parse_info;
       break;
@@ -116,9 +119,6 @@ spa_format_video_parse (const SpaFormat *format,
       return SPA_RESULT_INVALID_ARGUMENTS;
   }
 
-  info->media_type = format->body.media_type;
-  info->media_subtype = format->body.media_subtype;
-
   SPA_POD_FOREACH (format, prop) {
     if ((find = parse_info_find (pinfo, prop->body.key, prop->body.value.type))) {
       memcpy (SPA_MEMBER (info, find->offset, void),
@@ -142,8 +142,8 @@ spa_format_filter (const SpaFormat  *format,
     return SPA_RESULT_OK;
   }
 
-  if (filter->body.media_type != format->body.media_type ||
-      filter->body.media_subtype != format->body.media_subtype)
+  if (filter->body.media_type.value != format->body.media_type.value ||
+      filter->body.media_subtype.value != format->body.media_subtype.value)
     return SPA_RESULT_INVALID_MEDIA_TYPE;
 
   spa_pod_builder_raw (result, format, SPA_POD_SIZE (format), true);
diff --git a/spa/plugins/alsa/alsa-sink.c b/spa/plugins/alsa/alsa-sink.c
index f369ff257..2ed5d6f85 100644
--- a/spa/plugins/alsa/alsa-sink.c
+++ b/spa/plugins/alsa/alsa-sink.c
@@ -52,6 +52,7 @@ update_state (SpaALSASink *this, SpaNodeState state)
   this->node.state = state;
 }
 
+#if 0
 static const uint32_t min_uint32 = 1;
 static const uint32_t max_uint32 = UINT32_MAX;
 
@@ -109,6 +110,7 @@ static const SpaPropInfo prop_info[] =
                                 SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
                                 NULL },
 };
+#endif
 
 static SpaResult
 spa_alsa_sink_node_get_props (SpaNode       *node,
@@ -146,7 +148,7 @@ spa_alsa_sink_node_set_props (SpaNode         *node,
     return SPA_RESULT_OK;
   }
 
-  res = spa_props_copy_values (props, &p->props);
+  //res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -829,8 +831,10 @@ alsa_sink_init (const SpaHandleFactory  *factory,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = alsasink_node;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   this->stream = SND_PCM_STREAM_PLAYBACK;
   reset_alsa_sink_props (&this->props[1]);
 
@@ -839,7 +843,7 @@ alsa_sink_init (const SpaHandleFactory  *factory,
   for (i = 0; info && i < info->n_items; i++) {
     if (!strcmp (info->items[i].key, "alsa.card")) {
       snprintf (this->props[1].device, 63, "hw:%s", info->items[i].value);
-      this->props[1].props.unset_mask &= ~1;
+//      this->props[1].props.unset_mask &= ~1;
     }
   }
 
diff --git a/spa/plugins/alsa/alsa-source.c b/spa/plugins/alsa/alsa-source.c
index 3f0443587..2b6eb7980 100644
--- a/spa/plugins/alsa/alsa-source.c
+++ b/spa/plugins/alsa/alsa-source.c
@@ -50,9 +50,9 @@ reset_alsa_props (SpaALSAProps *props)
   props->period_size = default_period_size;
   props->periods = default_periods;
   props->period_event = default_period_event;
-  props->props.unset_mask = 0xf;
 }
 
+#if 0
 static const uint32_t min_uint32 = 1;
 static const uint32_t max_uint32 = UINT32_MAX;
 
@@ -110,6 +110,7 @@ static const SpaPropInfo prop_info[] =
                                 SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
                                 NULL },
 };
+#endif
 
 static SpaResult
 spa_alsa_source_node_get_props (SpaNode       *node,
@@ -147,7 +148,7 @@ spa_alsa_source_node_set_props (SpaNode         *node,
     return SPA_RESULT_OK;
   }
 
-  res = spa_props_copy_values (props, &p->props);
+  //res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -896,8 +897,10 @@ alsa_source_init (const SpaHandleFactory  *factory,
 
   this->node = alsasource_node;
   this->clock = alsasource_clock;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   this->stream = SND_PCM_STREAM_CAPTURE;
   reset_alsa_props (&this->props[1]);
 
@@ -907,7 +910,7 @@ alsa_source_init (const SpaHandleFactory  *factory,
   for (i = 0; info && i < info->n_items; i++) {
     if (!strcmp (info->items[i].key, "alsa.card")) {
       snprintf (this->props[1].device, 63, "hw:%s", info->items[i].value);
-      this->props[1].props.unset_mask &= ~1;
+//      this->props[1].props.unset_mask &= ~1;
     }
   }
 
diff --git a/spa/plugins/audiomixer/audiomixer.c b/spa/plugins/audiomixer/audiomixer.c
index ce7e1347b..0ed305095 100644
--- a/spa/plugins/audiomixer/audiomixer.c
+++ b/spa/plugins/audiomixer/audiomixer.c
@@ -97,11 +97,6 @@ enum {
   PROP_ID_LAST,
 };
 
-static const SpaPropInfo prop_info[] =
-{
-  { PROP_ID_LAST, },
-};
-
 static void
 reset_audiomixer_props (SpaAudioMixerProps *props)
 {
@@ -119,7 +114,6 @@ spa_audiomixer_node_get_props (SpaNode       *node,
   this = SPA_CONTAINER_OF (node, SpaAudioMixer, node);
 
   memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
-  *props = &this->props[0].props;
 
   return SPA_RESULT_OK;
 }
@@ -142,7 +136,6 @@ spa_audiomixer_node_set_props (SpaNode         *node,
     reset_audiomixer_props (p);
     return SPA_RESULT_OK;
   }
-  res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -755,8 +748,10 @@ spa_audiomixer_init (const SpaHandleFactory *factory,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = audiomixer_node;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   reset_audiomixer_props (&this->props[1]);
 
   this->out_ports[0].valid = true;
diff --git a/spa/plugins/audiotestsrc/audiotestsrc.c b/spa/plugins/audiotestsrc/audiotestsrc.c
index 5f8e24744..60a7e5cd7 100644
--- a/spa/plugins/audiotestsrc/audiotestsrc.c
+++ b/spa/plugins/audiotestsrc/audiotestsrc.c
@@ -111,19 +111,20 @@ struct _SpaAudioTestSrc {
 #define DEFAULT_FREQ 440.0
 #define DEFAULT_LIVE true
 
+#if 0
 static const double min_volume = 0.0;
 static const double max_volume = 10.0;
 static const double min_freq = 0.0;
 static const double max_freq = 50000000.0;
 
+static const uint32_t wave_val_sine = 0;
+static const uint32_t wave_val_square = 1;
+
 static const SpaPropRangeInfo volume_range[] = {
   { "min", { sizeof (double), &min_volume } },
   { "max", { sizeof (double), &max_volume } },
 };
 
-static const uint32_t wave_val_sine = 0;
-static const uint32_t wave_val_square = 1;
-
 static const SpaPropRangeInfo wave_range[] = {
   { "sine", { sizeof (uint32_t), &wave_val_sine } },
   { "square", { sizeof (uint32_t), &wave_val_square } },
@@ -169,6 +170,7 @@ static const SpaPropInfo prop_info[] =
                                SPA_PROP_RANGE_TYPE_MIN_MAX, 2, volume_range,
                                NULL },
 };
+#endif
 
 static SpaResult
 reset_audiotestsrc_props (SpaAudioTestSrcProps *props)
@@ -193,7 +195,6 @@ spa_audiotestsrc_node_get_props (SpaNode       *node,
   this = SPA_CONTAINER_OF (node, SpaAudioTestSrc, node);
 
   memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
-  *props = &this->props[0].props;
 
   return SPA_RESULT_OK;
 }
@@ -215,7 +216,7 @@ spa_audiotestsrc_node_set_props (SpaNode         *node,
   if (props == NULL) {
     res = reset_audiotestsrc_props (p);
   } else {
-    res = spa_props_copy_values (props, &p->props);
+//    res = spa_props_copy_values (props, &p->props);
   }
 
   if (this->props[1].live)
@@ -988,8 +989,10 @@ audiotestsrc_init (const SpaHandleFactory  *factory,
 
   this->node = audiotestsrc_node;
   this->clock = audiotestsrc_clock;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   reset_audiotestsrc_props (&this->props[1]);
 
   spa_list_init (&this->empty);
diff --git a/spa/plugins/ffmpeg/ffmpeg-dec.c b/spa/plugins/ffmpeg/ffmpeg-dec.c
index 5c7680431..1a4a117da 100644
--- a/spa/plugins/ffmpeg/ffmpeg-dec.c
+++ b/spa/plugins/ffmpeg/ffmpeg-dec.c
@@ -87,11 +87,6 @@ enum {
   PROP_ID_LAST,
 };
 
-static const SpaPropInfo prop_info[] =
-{
-  { 0, },
-};
-
 static SpaResult
 spa_ffmpeg_dec_node_get_props (SpaNode       *node,
                                SpaProps     **props)
@@ -128,7 +123,7 @@ spa_ffmpeg_dec_node_set_props (SpaNode         *node,
     return SPA_RESULT_OK;
   }
 
-  res = spa_props_copy_values (props, &p->props);
+  //res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -581,8 +576,10 @@ spa_ffmpeg_dec_init (SpaHandle         *handle,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = ffmpeg_dec_node;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   reset_ffmpeg_dec_props (&this->props[1]);
 
   this->in_ports[0].info.flags = SPA_PORT_INFO_FLAG_NONE;
diff --git a/spa/plugins/ffmpeg/ffmpeg-enc.c b/spa/plugins/ffmpeg/ffmpeg-enc.c
index 584ebefc1..72722324e 100644
--- a/spa/plugins/ffmpeg/ffmpeg-enc.c
+++ b/spa/plugins/ffmpeg/ffmpeg-enc.c
@@ -91,11 +91,6 @@ enum {
   PROP_ID_LAST,
 };
 
-static const SpaPropInfo prop_info[] =
-{
-  { 0, },
-};
-
 static void
 update_state (SpaFFMpegEnc *this, SpaNodeState state)
 {
@@ -138,7 +133,7 @@ spa_ffmpeg_enc_node_set_props (SpaNode         *node,
     return SPA_RESULT_OK;
   }
 
-  res = spa_props_copy_values (props, &p->props);
+  //res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -308,8 +303,8 @@ spa_ffmpeg_enc_node_port_set_format (SpaNode            *node,
     return SPA_RESULT_OK;
   }
 
-  if (format->body.media_type != SPA_MEDIA_TYPE_VIDEO ||
-      format->body.media_subtype != SPA_MEDIA_SUBTYPE_RAW)
+  if (format->body.media_type.value != SPA_MEDIA_TYPE_VIDEO ||
+      format->body.media_subtype.value != SPA_MEDIA_SUBTYPE_RAW)
     return SPA_RESULT_INVALID_MEDIA_TYPE;
 
   if ((res = spa_format_video_parse (format, &port->format[0]) < 0))
@@ -588,8 +583,6 @@ spa_ffmpeg_enc_init (SpaHandle         *handle,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = ffmpeg_enc_node;
-  this->props[1].props.n_prop_info = PROP_ID_LAST;
-  this->props[1].props.prop_info = prop_info;
   reset_ffmpeg_enc_props (&this->props[1]);
 
   this->in_ports[0].info.flags = SPA_PORT_INFO_FLAG_NONE;
diff --git a/spa/plugins/v4l2/v4l2-source.c b/spa/plugins/v4l2/v4l2-source.c
index 57d9ca516..10a07d08a 100644
--- a/spa/plugins/v4l2/v4l2-source.c
+++ b/spa/plugins/v4l2/v4l2-source.c
@@ -39,7 +39,6 @@ typedef struct _SpaV4l2Source SpaV4l2Source;
 static const char default_device[] = "/dev/video0";
 
 typedef struct {
-  SpaProps props;
   char device[64];
   char device_name[128];
   int  device_fd;
@@ -49,7 +48,6 @@ static void
 reset_v4l2_source_props (SpaV4l2SourceProps *props)
 {
   strncpy (props->device, default_device, 64);
-  props->props.unset_mask = 7;
 }
 
 #define MAX_BUFFERS     64
@@ -121,7 +119,8 @@ struct _SpaV4l2Source {
 
   uint32_t seq;
 
-  SpaV4l2SourceProps props[2];
+  uint8_t props_buffer[512];
+  SpaV4l2SourceProps props;
 
   SpaNodeEventCallback event_cb;
   void *user_data;
@@ -140,32 +139,10 @@ update_state (SpaV4l2Source *this, SpaNodeState state)
 #include "v4l2-utils.c"
 
 enum {
+  PROP_ID_NONE,
   PROP_ID_DEVICE,
   PROP_ID_DEVICE_NAME,
   PROP_ID_DEVICE_FD,
-  PROP_ID_LAST,
-};
-
-static const SpaPropInfo prop_info[] =
-{
-  { PROP_ID_DEVICE,             offsetof (SpaV4l2SourceProps, device),
-                                "device",
-                                SPA_PROP_FLAG_READWRITE,
-                                SPA_PROP_TYPE_STRING, 63,
-                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
-                                NULL },
-  { PROP_ID_DEVICE_NAME,        offsetof (SpaV4l2SourceProps, device_name),
-                                "device-name",
-                                SPA_PROP_FLAG_READABLE,
-                                SPA_PROP_TYPE_STRING, 127,
-                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
-                                NULL },
-  { PROP_ID_DEVICE_FD,          offsetof (SpaV4l2SourceProps, device_fd),
-                                "device-fd",
-                                SPA_PROP_FLAG_READABLE,
-                                SPA_PROP_TYPE_UINT32, sizeof (uint32_t),
-                                SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
-                                NULL },
 };
 
 static SpaResult
@@ -173,14 +150,33 @@ spa_v4l2_source_node_get_props (SpaNode       *node,
                                 SpaProps     **props)
 {
   SpaV4l2Source *this;
+  SpaPODBuilder b = { NULL,  };
 
   if (node == NULL || props == NULL)
     return SPA_RESULT_INVALID_ARGUMENTS;
 
   this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
 
-  memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
-  *props = &this->props[0].props;
+  b.data = this->props_buffer;
+  b.size = sizeof (this->props_buffer);
+
+  *props = SPA_MEMBER (b.data, spa_pod_builder_props (&b,
+
+           PROP_ID_DEVICE,      SPA_POD_TYPE_STRING,
+                                    this->props.device, sizeof (this->props.device),
+                                SPA_POD_PROP_FLAG_READWRITE |
+                                SPA_POD_PROP_RANGE_NONE,
+
+           PROP_ID_DEVICE_NAME, SPA_POD_TYPE_STRING,
+                                    this->props.device_name, sizeof (this->props.device_name),
+                                SPA_POD_PROP_FLAG_READABLE |
+                                SPA_POD_PROP_RANGE_NONE,
+
+           PROP_ID_DEVICE_FD,   SPA_POD_TYPE_INT,
+                                    this->props.device_fd,
+                                SPA_POD_PROP_FLAG_READABLE |
+                                SPA_POD_PROP_RANGE_NONE,
+           0), SpaProps);
 
   return SPA_RESULT_OK;
 }
@@ -190,23 +186,27 @@ spa_v4l2_source_node_set_props (SpaNode         *node,
                                 const SpaProps  *props)
 {
   SpaV4l2Source *this;
-  SpaV4l2SourceProps *p;
-  SpaResult res;
 
   if (node == NULL)
     return SPA_RESULT_INVALID_ARGUMENTS;
 
   this = SPA_CONTAINER_OF (node, SpaV4l2Source, node);
-  p = &this->props[1];
 
   if (props == NULL) {
-    reset_v4l2_source_props (p);
+    reset_v4l2_source_props (&this->props);
     return SPA_RESULT_OK;
+  } else {
+    SpaPODProp *pr;
+
+    SPA_POD_OBJECT_BODY_FOREACH (&props->body, props->pod.size, pr) {
+      switch (pr->body.key) {
+        case PROP_ID_DEVICE:
+          strncpy (this->props.device, SPA_POD_CONTENTS (SpaPODProp, pr), 63);
+          break;
+      }
+    }
   }
-
-  res = spa_props_copy_values (props, &p->props);
-
-  return res;
+  return SPA_RESULT_OK;
 }
 
 static SpaResult
@@ -961,9 +961,8 @@ v4l2_source_init (const SpaHandleFactory  *factory,
 
   this->node = v4l2source_node;
   this->clock = v4l2source_clock;
-  this->props[1].props.n_prop_info = PROP_ID_LAST;
-  this->props[1].props.prop_info = prop_info;
-  reset_v4l2_source_props (&this->props[1]);
+
+  reset_v4l2_source_props (&this->props);
 
   this->state[0].log = this->log;
   this->state[0].info.flags = SPA_PORT_INFO_FLAG_LIVE;
@@ -971,10 +970,8 @@ v4l2_source_init (const SpaHandleFactory  *factory,
   this->state[0].export_buf = true;
 
   if (info && (str = spa_dict_lookup (info, "device.path"))) {
-    strncpy (this->props[1].device, str, 63);
-    this->props[1].props.unset_mask &= ~1;
+    strncpy (this->props.device, str, 63);
   }
-  this->props[1].props.unset_mask &= ~1;
 
   update_state (this, SPA_NODE_STATE_CONFIGURE);
 
diff --git a/spa/plugins/v4l2/v4l2-utils.c b/spa/plugins/v4l2/v4l2-utils.c
index c1b8643c2..c7c6c8dac 100644
--- a/spa/plugins/v4l2/v4l2-utils.c
+++ b/spa/plugins/v4l2/v4l2-utils.c
@@ -28,12 +28,12 @@ spa_v4l2_open (SpaV4l2Source *this)
 {
   SpaV4l2State *state = &this->state[0];
   struct stat st;
-  SpaV4l2SourceProps *props = &this->props[1];
+  SpaV4l2SourceProps *props = &this->props;
 
   if (state->opened)
     return 0;
 
-  if (props->props.unset_mask & 1) {
+  if (props->device[0] == '\0') {
     spa_log_error (state->log, "v4l2: Device property not set");
     return -1;
   }
@@ -326,9 +326,9 @@ enum_filter_format (const SpaFormat *filter, unsigned int index)
 {
   SpaVideoFormat video_format = SPA_VIDEO_FORMAT_UNKNOWN;
 
-  if ((filter->body.media_type == SPA_MEDIA_TYPE_VIDEO ||
-       filter->body.media_type == SPA_MEDIA_TYPE_IMAGE)) {
-    if (filter->body.media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
+  if ((filter->body.media_type.value == SPA_MEDIA_TYPE_VIDEO ||
+       filter->body.media_type.value == SPA_MEDIA_TYPE_IMAGE)) {
+    if (filter->body.media_subtype.value == SPA_MEDIA_SUBTYPE_RAW) {
       SpaPODProp *p;
       unsigned int n_values;
       const uint32_t *values;
@@ -488,8 +488,8 @@ next_fmtdesc:
       if (video_format == SPA_VIDEO_FORMAT_UNKNOWN)
         return SPA_RESULT_ENUM_END;
 
-      info = find_format_info_by_media_type (filter->body.media_type,
-                                             filter->body.media_subtype,
+      info = find_format_info_by_media_type (filter->body.media_type.value,
+                                             filter->body.media_subtype.value,
                                              video_format,
                                              0);
       if (info == NULL)
@@ -562,12 +562,12 @@ do_frmsize:
                                                &values[2],
                                                &step))
           goto have_size;
-      } else if (range == SPA_PROP_RANGE_TYPE_STEP && n_values > 3) {
+      } else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) {
         if (filter_framesize (&state->frmsize, &values[1],
                                                &values[2],
                                                &values[3]))
           goto have_size;
-      } else if (range == SPA_PROP_RANGE_TYPE_ENUM) {
+      } else if (range == SPA_POD_PROP_RANGE_ENUM) {
         for (i = 1; i < n_values; i++) {
           if (filter_framesize (&state->frmsize, &values[i],
                                                  &values[i],
@@ -668,17 +668,17 @@ have_size:
                                                &values[0],
                                                &step))
           goto have_framerate;
-      } else if (range == SPA_PROP_RANGE_TYPE_MIN_MAX && n_values > 2) {
+      } else if (range == SPA_POD_PROP_RANGE_MIN_MAX && n_values > 2) {
         if (filter_framerate (&state->frmival, &values[1],
                                                &values[2],
                                                &step))
           goto have_framerate;
-      } else if (range == SPA_PROP_RANGE_TYPE_STEP && n_values > 3) {
+      } else if (range == SPA_POD_PROP_RANGE_STEP && n_values > 3) {
         if (filter_framerate (&state->frmival, &values[1],
                                                &values[2],
                                                &values[3]))
           goto have_framerate;
-      } else if (range == SPA_PROP_RANGE_TYPE_ENUM) {
+      } else if (range == SPA_POD_PROP_RANGE_ENUM) {
         for (i = 1; i < n_values; i++) {
           if (filter_framerate (&state->frmival, &values[i],
                                                  &values[i],
@@ -693,7 +693,7 @@ have_size:
 have_framerate:
 
     if (state->frmival.type == V4L2_FRMIVAL_TYPE_DISCRETE) {
-      prop->body.flags |= SPA_PROP_RANGE_TYPE_ENUM;
+      prop->body.flags |= SPA_POD_PROP_RANGE_ENUM;
       spa_pod_builder_fraction (&b,
                                 state->frmival.discrete.denominator,
                                 state->frmival.discrete.numerator);
@@ -708,9 +708,9 @@ have_framerate:
                                 state->frmival.stepwise.max.numerator);
 
       if (state->frmival.type == V4L2_FRMIVAL_TYPE_CONTINUOUS) {
-        prop->body.flags |= SPA_PROP_RANGE_TYPE_MIN_MAX;
+        prop->body.flags |= SPA_POD_PROP_RANGE_MIN_MAX;
       } else {
-        prop->body.flags |= SPA_PROP_RANGE_TYPE_STEP;
+        prop->body.flags |= SPA_POD_PROP_RANGE_STEP;
         spa_pod_builder_fraction (&b,
                                   state->frmival.stepwise.step.denominator,
                                   state->frmival.stepwise.step.numerator);
diff --git a/spa/plugins/videotestsrc/draw.c b/spa/plugins/videotestsrc/draw.c
index 73c8e7c70..f7563e38f 100644
--- a/spa/plugins/videotestsrc/draw.c
+++ b/spa/plugins/videotestsrc/draw.c
@@ -283,7 +283,7 @@ draw (SpaVideoTestSrc *this, char *data)
   if (res != SPA_RESULT_OK)
     return res;
 
-  pattern = this->props[1].pattern;
+  pattern = this->props.pattern;
   if (pattern == pattern_val_smpte_snow)
     draw_smpte_snow (&dd);
   else if (pattern == pattern_val_snow)
diff --git a/spa/plugins/videotestsrc/videotestsrc.c b/spa/plugins/videotestsrc/videotestsrc.c
index dc9729349..ff5fd8c18 100644
--- a/spa/plugins/videotestsrc/videotestsrc.c
+++ b/spa/plugins/videotestsrc/videotestsrc.c
@@ -44,7 +44,6 @@ typedef struct {
 typedef struct _SpaVideoTestSrc SpaVideoTestSrc;
 
 typedef struct {
-  SpaProps props;
   bool live;
   uint32_t pattern;
 } SpaVideoTestSrcProps;
@@ -72,7 +71,8 @@ struct _SpaVideoTestSrc {
   SpaLog *log;
   SpaLoop *data_loop;
 
-  SpaVideoTestSrcProps props[2];
+  SpaVideoTestSrcProps props;
+  uint8_t props_buffer[256];
 
   SpaNodeEventCallback event_cb;
   void *user_data;
@@ -110,17 +110,18 @@ struct _SpaVideoTestSrc {
 static const uint32_t pattern_val_smpte_snow = 0;
 static const uint32_t pattern_val_snow = 1;
 
+enum {
+  PROP_ID_NONE = 0,
+  PROP_ID_LIVE,
+  PROP_ID_PATTERN,
+};
+
+#if 0
 static const SpaPropRangeInfo pattern_range[] = {
   { "smpte-snow", { sizeof (uint32_t), &pattern_val_smpte_snow } },
   { "snow", { sizeof (uint32_t), &pattern_val_snow } },
 };
 
-enum {
-  PROP_ID_LIVE,
-  PROP_ID_PATTERN,
-  PROP_ID_LAST,
-};
-
 static const SpaPropInfo prop_info[] =
 {
   { PROP_ID_LIVE,              offsetof (SpaVideoTestSrcProps, live),
@@ -136,6 +137,7 @@ static const SpaPropInfo prop_info[] =
                                SPA_PROP_RANGE_TYPE_ENUM, SPA_N_ELEMENTS (pattern_range), pattern_range,
                                NULL },
 };
+#endif
 
 static SpaResult
 reset_videotestsrc_props (SpaVideoTestSrcProps *props)
@@ -151,14 +153,28 @@ spa_videotestsrc_node_get_props (SpaNode       *node,
                                  SpaProps     **props)
 {
   SpaVideoTestSrc *this;
+  SpaPODBuilder b = { NULL,  };
 
   if (node == NULL || props == NULL)
     return SPA_RESULT_INVALID_ARGUMENTS;
 
   this = SPA_CONTAINER_OF (node, SpaVideoTestSrc, node);
 
-  memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
-  *props = &this->props[0].props;
+  b.data = this->props_buffer;
+  b.size = sizeof (this->props_buffer);
+
+  *props = SPA_MEMBER (b.data, spa_pod_builder_props (&b,
+           PROP_ID_LIVE,      SPA_POD_TYPE_BOOL,
+                                  this->props.live,
+                              SPA_POD_PROP_FLAG_READWRITE |
+                              SPA_POD_PROP_RANGE_NONE,
+           PROP_ID_PATTERN,   SPA_POD_TYPE_INT,
+                                  this->props.pattern,
+                              SPA_POD_PROP_FLAG_READWRITE |
+                              SPA_POD_PROP_RANGE_ENUM, 2,
+                                  pattern_val_smpte_snow,
+                                  pattern_val_snow,
+           0), SpaProps);
 
   return SPA_RESULT_OK;
 }
@@ -175,15 +191,26 @@ spa_videotestsrc_node_set_props (SpaNode         *node,
     return SPA_RESULT_INVALID_ARGUMENTS;
 
   this = SPA_CONTAINER_OF (node, SpaVideoTestSrc, node);
-  p = &this->props[1];
+  p = &this->props;
 
   if (props == NULL) {
     res = reset_videotestsrc_props (p);
   } else {
-    res = spa_props_copy_values (props, &p->props);
+    SpaPODProp *pr;
+
+    SPA_POD_OBJECT_BODY_FOREACH(&props->body, props->pod.size, pr) {
+      switch (pr->body.key) {
+        case PROP_ID_LIVE:
+          this->props.live = ((SpaPODBool*)&pr->body.value)->value;
+          break;
+        case PROP_ID_PATTERN:
+          this->props.pattern = ((SpaPODInt*)&pr->body.value)->value;
+          break;
+      }
+    }
   }
 
-  if (this->props[1].live)
+  if (this->props.live)
     this->info.flags |= SPA_PORT_INFO_FLAG_LIVE;
   else
     this->info.flags &= ~SPA_PORT_INFO_FLAG_LIVE;
@@ -217,7 +244,7 @@ static void
 set_timer (SpaVideoTestSrc *this, bool enabled)
 {
   if (enabled) {
-    if (this->props[1].live) {
+    if (this->props.live) {
       uint64_t next_time = this->start_time + this->elapsed_time;
       this->timerspec.it_value.tv_sec = next_time / SPA_NSEC_PER_SEC;
       this->timerspec.it_value.tv_nsec = next_time % SPA_NSEC_PER_SEC;
@@ -305,7 +332,7 @@ spa_videotestsrc_node_send_command (SpaNode        *node,
         return SPA_RESULT_OK;
 
       clock_gettime (CLOCK_MONOTONIC, &now);
-      if (this->props[1].live)
+      if (this->props.live)
         this->start_time = SPA_TIMESPEC_TO_TIME (&now);
       else
         this->start_time = 0;
@@ -782,7 +809,7 @@ spa_videotestsrc_node_port_reuse_buffer (SpaNode         *node,
   b->outstanding = false;
   spa_list_insert (this->empty.prev, &b->link);
 
-  if (!this->props[1].live)
+  if (!this->props.live)
     set_timer (this, true);
 
   return SPA_RESULT_OK;
@@ -962,9 +989,11 @@ videotestsrc_init (const SpaHandleFactory  *factory,
 
   this->node = videotestsrc_node;
   this->clock = videotestsrc_clock;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
-  reset_videotestsrc_props (&this->props[1]);
+#endif
+  reset_videotestsrc_props (&this->props);
 
   spa_list_init (&this->empty);
 
@@ -980,7 +1009,7 @@ videotestsrc_init (const SpaHandleFactory  *factory,
 
   this->info.flags = SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
                      SPA_PORT_INFO_FLAG_NO_REF;
-  if (this->props[1].live)
+  if (this->props.live)
     this->info.flags |= SPA_PORT_INFO_FLAG_LIVE;
 
   this->node.state = SPA_NODE_STATE_CONFIGURE;
diff --git a/spa/plugins/volume/volume.c b/spa/plugins/volume/volume.c
index 6e2398ef0..32e28a0e5 100644
--- a/spa/plugins/volume/volume.c
+++ b/spa/plugins/volume/volume.c
@@ -91,9 +91,11 @@ struct _SpaVolume {
 #define CHECK_PORT(this,d,p)     ((p) == 0)
 
 static const double default_volume = 1.0;
+static const bool default_mute = false;
+
+#if 0
 static const double min_volume = 0.0;
 static const double max_volume = 10.0;
-static const bool default_mute = false;
 
 static const SpaPropRangeInfo volume_range[] = {
   { "min", { sizeof (double), &min_volume } },
@@ -122,6 +124,8 @@ static const SpaPropInfo prop_info[] =
                                NULL },
 };
 
+#endif
+
 static void
 reset_volume_props (SpaVolumeProps *props)
 {
@@ -170,7 +174,7 @@ spa_volume_node_set_props (SpaNode          *node,
     reset_volume_props (p);
     return SPA_RESULT_OK;
   }
-  res = spa_props_copy_values (props, &p->props);
+  //res = spa_props_copy_values (props, &p->props);
 
   return res;
 }
@@ -848,8 +852,10 @@ volume_init (const SpaHandleFactory  *factory,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = volume_node;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   reset_volume_props (&this->props[1]);
 
   this->in_ports[0].info.flags = SPA_PORT_INFO_FLAG_CAN_USE_BUFFERS |
diff --git a/spa/plugins/xv/xv-sink.c b/spa/plugins/xv/xv-sink.c
index 05d5d0b5e..307155ca6 100644
--- a/spa/plugins/xv/xv-sink.c
+++ b/spa/plugins/xv/xv-sink.c
@@ -107,6 +107,7 @@ enum {
   PROP_ID_LAST,
 };
 
+#if 0
 static const SpaPropInfo prop_info[] =
 {
   { PROP_ID_DEVICE,             offsetof (SpaXvSinkProps, device),
@@ -128,6 +129,7 @@ static const SpaPropInfo prop_info[] =
                                 SPA_PROP_RANGE_TYPE_NONE, 0, NULL,
                                 NULL },
 };
+#endif
 
 static void
 update_state (SpaXvSink *this, SpaNodeState state)
@@ -147,7 +149,6 @@ spa_xv_sink_node_get_props (SpaNode       *node,
   this = SPA_CONTAINER_OF (node, SpaXvSink, node);
 
   memcpy (&this->props[0], &this->props[1], sizeof (this->props[1]));
-  *props = &this->props[0].props;
 
   return SPA_RESULT_OK;
 }
@@ -170,9 +171,6 @@ spa_xv_sink_node_set_props (SpaNode         *node,
     reset_xv_sink_props (p);
     return SPA_RESULT_OK;
   }
-
-  res = spa_props_copy_values (props, &p->props);
-
   return res;
 }
 
@@ -337,8 +335,8 @@ spa_xv_sink_node_port_set_format (SpaNode            *node,
     return SPA_RESULT_OK;
   }
 
-  if (format->body.media_type == SPA_MEDIA_TYPE_VIDEO) {
-    if (format->body.media_subtype == SPA_MEDIA_SUBTYPE_RAW) {
+  if (format->body.media_type.value == SPA_MEDIA_TYPE_VIDEO) {
+    if (format->body.media_subtype.value == SPA_MEDIA_SUBTYPE_RAW) {
       if ((res = spa_format_video_parse (format, &info) < 0))
         return res;
     } else
@@ -584,8 +582,10 @@ xv_sink_init (const SpaHandleFactory  *factory,
   this->uri.node = spa_id_map_get_id (this->map, SPA_NODE_URI);
 
   this->node = xvsink_node;
+#if 0
   this->props[1].props.n_prop_info = PROP_ID_LAST;
   this->props[1].props.prop_info = prop_info;
+#endif
   reset_xv_sink_props (&this->props[1]);
 
   this->info.flags = SPA_PORT_INFO_FLAG_NONE;
diff --git a/spa/tests/test-props.c b/spa/tests/test-props.c
index 4456efc1f..1137bb742 100644
--- a/spa/tests/test-props.c
+++ b/spa/tests/test-props.c
@@ -86,9 +86,10 @@ static const struct _test_format {
     } framerate_vals;
   } props;
 } test_format = {
-  { { sizeof (test_format.props) + sizeof (SpaFormatBody), SPA_POD_TYPE_FORMAT },
-    { SPA_MEDIA_TYPE_VIDEO,
-      SPA_MEDIA_SUBTYPE_RAW },
+  { { { sizeof (test_format.props) + sizeof (SpaFormatBody) + sizeof (SpaPODObjectBody), SPA_POD_TYPE_OBJECT },
+      { 0, 0 } },
+    { { { sizeof (uint32_t), SPA_POD_TYPE_INT }, SPA_MEDIA_TYPE_VIDEO },
+      { { sizeof (uint32_t), SPA_POD_TYPE_INT }, SPA_MEDIA_SUBTYPE_RAW } },
   }, {
   { { sizeof (test_format.props.format_vals) + sizeof (SpaPODPropBody),
       SPA_POD_TYPE_PROP } ,
@@ -156,7 +157,7 @@ main (int argc, char *argv[])
 
   spa_pod_builder_pop (&b, &frame[0]);
 
-  spa_debug_pod (&fmt->pod);
+  spa_debug_pod (&fmt->obj.pod);
 
   memset (&b, 0, sizeof(b));
   b.data = buffer;
@@ -183,10 +184,10 @@ main (int argc, char *argv[])
            0);
 
   fmt = SPA_MEMBER (buffer, o, SpaFormat);
-  spa_debug_pod (&fmt->pod);
+  spa_debug_pod (&fmt->obj.pod);
   spa_debug_format (fmt);
 
-  spa_debug_pod (&test_format.fmt.pod);
+  spa_debug_pod (&test_format.fmt.obj.pod);
   spa_debug_format (&test_format.fmt);
 
   return 0;