Fix T53808: VSE doesn't show scene strip markers

source/blender/blenkernel/intern/scene.c

@@ -1139,6 +1139,10 @@ Object *BKE_scene_camera_find(Scene *sc)
 #ifdef DURIAN_CAMERA_SWITCH
 Object *BKE_scene_camera_switch_find(Scene *scene)
 {
+	if (scene->r.mode & R_NO_CAMERA_SWITCH) {
+		return NULL;
+	}
+
 	TimeMarker *m;
 	int cfra = scene->r.cfra;
 	int frame = -(MAXFRAME + 1);

source/blender/blenkernel/intern/sequencer.c

@@ -3199,11 +3199,12 @@ static ImBuf *seq_render_scene_strip(const SeqRenderData *context, Sequence *seq
 		int scemode;
 		int cfra;
 		float subframe;
+
 #ifdef DURIAN_CAMERA_SWITCH
-		ListBase markers;
+		int mode;
 #endif
 	} orig_data;
-	
+
 	/* Old info:
 	 * Hack! This function can be called from do_render_seq(), in that case
 	 * the seq->scene can already have a Render initialized with same name,
@@ -3263,7 +3264,7 @@ static ImBuf *seq_render_scene_strip(const SeqRenderData *context, Sequence *seq
 	orig_data.cfra = scene->r.cfra;
 	orig_data.subframe = scene->r.subframe;
 #ifdef DURIAN_CAMERA_SWITCH
-	orig_data.markers = scene->markers;
+	orig_data.mode = scene->r.mode;
 #endif
 
 	BKE_scene_frame_set(scene, frame);
@@ -3286,10 +3287,10 @@ static ImBuf *seq_render_scene_strip(const SeqRenderData *context, Sequence *seq
 
 	/* prevent eternal loop */
 	scene->r.scemode &= ~R_DOSEQ;
-	
+
 #ifdef DURIAN_CAMERA_SWITCH
 	/* stooping to new low's in hackyness :( */
-	BLI_listbase_clear(&scene->markers);
+	scene->r.mode |= R_NO_CAMERA_SWITCH;
 #endif
 
 	is_frame_update = (orig_data.cfra != scene->r.cfra) || (orig_data.subframe != scene->r.subframe);
@@ -3409,7 +3410,7 @@ finally:
 
 #ifdef DURIAN_CAMERA_SWITCH
 	/* stooping to new low's in hackyness :( */
-	scene->markers = orig_data.markers;
+	scene->r.mode &= ~(orig_data.mode & R_NO_CAMERA_SWITCH);
 #endif
 
 	return ibuf;

source/blender/blenloader/intern/readfile.c

@@ -6174,7 +6174,12 @@ static void direct_link_scene(FileData *fd, Scene *sce)
 			}
 		}
 	}
-	
+
+#ifdef DURIAN_CAMERA_SWITCH
+	/* Runtime */
+	sce->r.mode &= ~R_NO_CAMERA_SWITCH;
+#endif
+
 	sce->r.avicodecdata = newdataadr(fd, sce->r.avicodecdata);
 	if (sce->r.avicodecdata) {
 		sce->r.avicodecdata->lpFormat = newdataadr(fd, sce->r.avicodecdata->lpFormat);

source/blender/makesdna/DNA_scene_types.h

@@ -1729,7 +1729,8 @@ typedef struct Scene {
 #define R_BORDER		0x0200
 #define R_PANORAMA		0x0400	/* deprecated as scene option, still used in renderer */
 #define R_CROP			0x0800
-/*#define R_COSMO			0x1000 deprecated */
+		/* Disable camera switching: runtime (DURIAN_CAMERA_SWITCH) */
+#define R_NO_CAMERA_SWITCH	0x1000
 #define R_ODDFIELD		0x2000
 #define R_MBLUR			0x4000
 		/* unified was here */