diff --git a/spa/include/spa/param/video/format-utils.h b/spa/include/spa/param/video/format-utils.h
index 339e7e523..6f7b11a84 100644
--- a/spa/include/spa/param/video/format-utils.h
+++ b/spa/include/spa/param/video/format-utils.h
@@ -42,7 +42,9 @@ static inline int
 spa_format_video_raw_parse(const struct spa_pod *format,
 			   struct spa_video_info_raw *info)
 {
-	return spa_pod_parse_object(format,
+	int res;
+
+	res = spa_pod_parse_object(format,
 		SPA_TYPE_OBJECT_Format, NULL,
 		SPA_FORMAT_VIDEO_format,		SPA_POD_OPT_Id(&info->format),
 		SPA_FORMAT_VIDEO_modifier,		SPA_POD_OPT_Long(&info->modifier),
@@ -59,16 +61,26 @@ spa_format_video_raw_parse(const struct spa_pod *format,
 		SPA_FORMAT_VIDEO_colorMatrix,		SPA_POD_OPT_Id(&info->color_matrix),
 		SPA_FORMAT_VIDEO_transferFunction,	SPA_POD_OPT_Id(&info->transfer_function),
 		SPA_FORMAT_VIDEO_colorPrimaries,	SPA_POD_OPT_Id(&info->color_primaries));
+
+	info->use_modifier = spa_pod_find_prop (format, NULL, SPA_FORMAT_VIDEO_modifier) ? true : false;
+
+	return res;
 }
 
 static inline int
 spa_format_video_dsp_parse(const struct spa_pod *format,
 			   struct spa_video_info_dsp *info)
 {
-	return spa_pod_parse_object(format,
+	int res;
+
+	res = spa_pod_parse_object(format,
 		SPA_TYPE_OBJECT_Format, NULL,
 		SPA_FORMAT_VIDEO_format,		SPA_POD_OPT_Id(&info->format),
 		SPA_FORMAT_VIDEO_modifier,		SPA_POD_OPT_Long(&info->modifier));
+
+	info->use_modifier = spa_pod_find_prop (format, NULL, SPA_FORMAT_VIDEO_modifier) ? true : false;
+
+	return res;
 }
 
 static inline struct spa_pod *
@@ -90,7 +102,7 @@ spa_format_video_raw_build(struct spa_pod_builder *builder, uint32_t id,
 	if (info->framerate.denom != 0)
 		spa_pod_builder_add(builder,
 			SPA_FORMAT_VIDEO_framerate,	SPA_POD_Fraction(&info->framerate), 0);
-	if (info->modifier != 0)
+	if (info->use_modifier)
 		spa_pod_builder_add(builder,
 			SPA_FORMAT_VIDEO_modifier,	SPA_POD_Long(info->modifier), 0);
 	if (info->max_framerate.denom != 0)
@@ -142,7 +154,7 @@ spa_format_video_dsp_build(struct spa_pod_builder *builder, uint32_t id,
 	if (info->format != SPA_VIDEO_FORMAT_UNKNOWN)
 		spa_pod_builder_add(builder,
 			SPA_FORMAT_VIDEO_format,	SPA_POD_Id(info->format), 0);
-	if (info->modifier)
+	if (info->use_modifier)
 		spa_pod_builder_add(builder,
 			SPA_FORMAT_VIDEO_modifier,	SPA_POD_Long(info->modifier), 0);
 	return (struct spa_pod*)spa_pod_builder_pop(builder, &f);
diff --git a/spa/include/spa/param/video/raw.h b/spa/include/spa/param/video/raw.h
index 47fbd19b3..2beed4456 100644
--- a/spa/include/spa/param/video/raw.h
+++ b/spa/include/spa/param/video/raw.h
@@ -186,7 +186,9 @@ enum spa_video_interlace_mode {
  */
 struct spa_video_info_raw {
 	enum spa_video_format format;				/**< the format */
-	int64_t modifier;					/**< format modifier
+
+	bool use_modifier;					/**< whether the modifier field has a valid value */
+	uint64_t modifier;					/**< format modifier
 								  * only used with DMA-BUF */
 	struct spa_rectangle size;				/**< the frame size of the video */
 	struct spa_fraction framerate;				/**< the framerate of the video, 0/1 means variable rate */
@@ -210,7 +212,8 @@ struct spa_video_info_raw {
 
 struct spa_video_info_dsp {
 	enum spa_video_format format;
-	int64_t modifier;
+	bool use_modifier;
+	uint64_t modifier;
 };
 
 #define SPA_VIDEO_INFO_DSP_INIT(...)	((struct spa_video_info_dsp) { __VA_ARGS__ })
diff --git a/spa/plugins/libcamera/libcamera-source.cpp b/spa/plugins/libcamera/libcamera-source.cpp
index 26ef14874..62a73281d 100644
--- a/spa/plugins/libcamera/libcamera-source.cpp
+++ b/spa/plugins/libcamera/libcamera-source.cpp
@@ -676,7 +676,10 @@ static int port_set_format(struct impl *impl, struct port *port,
 			    info.media_subtype == port->current_format->media_subtype &&
 			    info.info.raw.format == port->current_format->info.raw.format &&
 			    info.info.raw.size.width == port->current_format->info.raw.size.width &&
-			    info.info.raw.size.height == port->current_format->info.raw.size.height)
+			    info.info.raw.size.height == port->current_format->info.raw.size.height &&
+			    info.info.raw.use_modifier == port->current_format->info.raw.use_modifier &&
+			    (!info.info.raw.use_modifier ||
+			     info.info.raw.modifier == port->current_format->info.raw.modifier))
 				return 0;
 			break;
 		case SPA_MEDIA_SUBTYPE_mjpg: