diff --git a/configure.ac b/configure.ac
index 2c090a6a2..c8383318f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -327,7 +327,7 @@ AC_SUBST(common_lib_abi_version)
 AC_SUBST(COMMON_LIB_TARGET, "lib/ultragrid/ug_lib_common.so.$common_lib_abi_version")
 LIB_TARGETS="$LIB_TARGETS $COMMON_LIB_TARGET"
 
-video_display_abi_version=2
+video_display_abi_version=3
 video_capture_abi_version=2
 video_compress_abi_version=1
 video_decompress_abi_version=2
diff --git a/src/main.c b/src/main.c
index 9a518a6ff..48e14a4b7 100644
--- a/src/main.c
+++ b/src/main.c
@@ -647,7 +647,7 @@ static void *receiver_thread(void *arg)
                                         gettimeofday(&uv->curr_time, NULL);
                                         fr = 1;
                                         display_put_frame(uv->display_device,
-                                                          (char *) cp->video_decoder_state->frame_buffer);
+                                                          cp->video_decoder_state->frame_buffer);
                                         cp->video_decoder_state->frame_buffer =
                                             display_get_frame(uv->display_device);
                                 }
diff --git a/src/video_display.c b/src/video_display.c
index 57f6490de..57bfdc608 100644
--- a/src/video_display.c
+++ b/src/video_display.c
@@ -89,7 +89,7 @@ typedef struct {
         const char               *func_finish_str;
         struct video_frame     *(*func_getf) (void *state);
         const char               *func_getf_str;
-        int                     (*func_putf) (void *state, char *frame);
+        int                     (*func_putf) (void *state, struct video_frame *frame);
         const char               *func_putf_str;
         int                     (*func_reconfigure)(void *state, struct video_desc desc);
         const char               *func_reconfigure_str;
@@ -461,7 +461,7 @@ struct video_frame *display_get_frame(struct display *d)
         return display_device_table[d->index].func_getf(d->state);
 }
 
-void display_put_frame(struct display *d, char *frame)
+void display_put_frame(struct display *d, struct video_frame *frame)
 {
         perf_record(UVP_PUTFRAME, frame);
         assert(d->magic == DISPLAY_MAGIC);
diff --git a/src/video_display.h b/src/video_display.h
index f49a0eba8..d2ac36404 100644
--- a/src/video_display.h
+++ b/src/video_display.h
@@ -131,13 +131,19 @@ void 		         display_finish(struct display *d);
 
 /**
  * Returns video frame which will be written to.
+ * Currently there is a restriction on number of concurrently acquired frames - only one frame
+ * can be hold at the moment.
+ *
+ * @return               video frame
  */
 struct video_frame      *display_get_frame(struct display *d);
 /* TODO: figure out what with frame parameter, which is no longer used. Leave out? */
 /**
  * Puts filled video frame.
+ * Currnetly, it must be the frame previously obtained by display_get_frame. Moreover, every frame
+ * acquired from video display should be put.
  */
-void 		         display_put_frame(struct display *d, char *frame);
+void 		         display_put_frame(struct display *d, struct video_frame *frame);
 /**
  * Tells display to reconfigure according to video description
  */
diff --git a/src/video_display/aggregate.c b/src/video_display/aggregate.c
index 5fbcbca37..c97a266be 100644
--- a/src/video_display/aggregate.c
+++ b/src/video_display/aggregate.c
@@ -236,7 +236,7 @@ struct video_frame *display_aggregate_getf(void *state)
         return s->frame;
 }
 
-int display_aggregate_putf(void *state, char *frame)
+int display_aggregate_putf(void *state, struct video_frame *frame)
 {
         unsigned int i;
         struct display_aggregate_state *s = (struct display_aggregate_state *)state;
diff --git a/src/video_display/aggregate.h b/src/video_display/aggregate.h
index ca374044b..3e9b5f446 100644
--- a/src/video_display/aggregate.h
+++ b/src/video_display/aggregate.h
@@ -57,7 +57,7 @@ void 			 display_aggregate_run(void *state);
 void 			 display_aggregate_finish(void *state);
 void 			 display_aggregate_done(void *state);
 struct video_frame	*display_aggregate_getf(void *state);
-int  			 display_aggregate_putf(void *state, char *frame);
+int  			 display_aggregate_putf(void *state, struct video_frame *frame);
 int                      display_aggregate_reconfigure(void *state, struct video_desc desc);
 int                      display_aggregate_get_property(void *state, int property, void *val, size_t *len);
 
diff --git a/src/video_display/decklink.cpp b/src/video_display/decklink.cpp
index 80dcd1aec..8156a108d 100644
--- a/src/video_display/decklink.cpp
+++ b/src/video_display/decklink.cpp
@@ -409,7 +409,7 @@ static void update_timecode(DeckLinkTimecode *tc, double fps)
         tc->SetBCD(bcd);
 }
 
-int display_decklink_putf(void *state, char *frame)
+int display_decklink_putf(void *state, struct video_frame *frame)
 {
         int tmp;
         struct state_decklink *s = (struct state_decklink *)state;
diff --git a/src/video_display/decklink.h b/src/video_display/decklink.h
index b27ab7cc1..bb78d1c1d 100644
--- a/src/video_display/decklink.h
+++ b/src/video_display/decklink.h
@@ -55,7 +55,7 @@ void                 display_decklink_run(void *state);
 void                 display_decklink_finish(void *state);
 void                 display_decklink_done(void *state);
 struct video_frame  *display_decklink_getf(void *state);
-int                  display_decklink_putf(void *state, char *frame);
+int                  display_decklink_putf(void *state, struct video_frame *frame);
 int                  display_decklink_reconfigure(void *state,
                                 struct video_desc desc);
 int                  display_decklink_get_property(void *state, int property, void *val, size_t *len);
diff --git a/src/video_display/deltacast.cpp b/src/video_display/deltacast.cpp
index ca12c6310..f1d3c1a4a 100644
--- a/src/video_display/deltacast.cpp
+++ b/src/video_display/deltacast.cpp
@@ -165,7 +165,7 @@ display_deltacast_getf(void *state)
         return s->frame;
 }
 
-int display_deltacast_putf(void *state, char *frame)
+int display_deltacast_putf(void *state, struct video_frame *frame)
 {
         int tmp;
         struct state_deltacast *s = (struct state_deltacast *)state;
diff --git a/src/video_display/deltacast.h b/src/video_display/deltacast.h
index 6dfcb8cf2..c6718744a 100644
--- a/src/video_display/deltacast.h
+++ b/src/video_display/deltacast.h
@@ -68,7 +68,7 @@ void                 display_deltacast_run(void *state);
 void                 display_deltacast_finish(void *state);
 void                 display_deltacast_done(void *state);
 struct video_frame  *display_deltacast_getf(void *state);
-int                  display_deltacast_putf(void *state, char *frame);
+int                  display_deltacast_putf(void *state, struct video_frame *frame);
 int                  display_deltacast_reconfigure(void *state,
                                 struct video_desc desc);
 int                  display_deltacast_get_property(void *state, int property, void *val, size_t *len);
diff --git a/src/video_display/dvs.c b/src/video_display/dvs.c
index 0be31cb07..f35396b4a 100644
--- a/src/video_display/dvs.c
+++ b/src/video_display/dvs.c
@@ -493,7 +493,7 @@ display_dvs_getf(void *state)
         return s->frame;
 }
 
-int display_dvs_putf(void *state, char *frame)
+int display_dvs_putf(void *state, struct video_frame *frame)
 {
         struct state_hdsp *s = (struct state_hdsp *)state;
         struct timeval t;
diff --git a/src/video_display/dvs.h b/src/video_display/dvs.h
index 2eacb0074..3c0ef0ef0 100644
--- a/src/video_display/dvs.h
+++ b/src/video_display/dvs.h
@@ -63,7 +63,7 @@ void                 display_dvs_run(void *state);
 void                 display_dvs_finish(void *state);
 void                 display_dvs_done(void *state);
 struct video_frame  *display_dvs_getf(void *state);
-int                  display_dvs_putf(void *state, char *frame);
+int                  display_dvs_putf(void *state, struct video_frame *frame);
 int                  display_dvs_reconfigure(void *state,
                                 struct video_desc desc);
 int                  display_dvs_get_property(void *state, int property, void *val, size_t *len);
diff --git a/src/video_display/gl.c b/src/video_display/gl.c
index b6986d797..c6770f773 100644
--- a/src/video_display/gl.c
+++ b/src/video_display/gl.c
@@ -1100,7 +1100,7 @@ struct video_frame * display_gl_getf(void *state)
         return s->frame;
 }
 
-int display_gl_putf(void *state, char *frame)
+int display_gl_putf(void *state, struct video_frame *frame)
 {
         struct state_gl *s = (struct state_gl *) state;
 
diff --git a/src/video_display/gl.h b/src/video_display/gl.h
index d6688abba..5a3a260d5 100644
--- a/src/video_display/gl.h
+++ b/src/video_display/gl.h
@@ -58,7 +58,7 @@ void                     display_gl_run(void *state);
 void                     display_gl_done(void *state);
 void                     display_gl_finish(void *state);
 struct video_frame      *display_gl_getf(void *state);
-int                      display_gl_putf(void *state, char *frame);
+int                      display_gl_putf(void *state, struct video_frame *frame);
 int                      display_gl_reconfigure(void *state, struct video_desc desc);
 int                      display_gl_get_property(void *state, int property, void *val, size_t *len);
 
diff --git a/src/video_display/null.c b/src/video_display/null.c
index b8eef3263..f09357499 100644
--- a/src/video_display/null.c
+++ b/src/video_display/null.c
@@ -93,7 +93,7 @@ struct video_frame *display_null_getf(void *state)
         return NULL;
 }
 
-int display_null_putf(void *state, char *frame)
+int display_null_putf(void *state, struct video_frame *frame)
 {
         struct state_null *s = (struct state_null *)state;
         assert(s->magic == MAGIC_NULL);
diff --git a/src/video_display/null.h b/src/video_display/null.h
index b8294edd1..e849156a0 100644
--- a/src/video_display/null.h
+++ b/src/video_display/null.h
@@ -54,7 +54,7 @@ void 			 display_null_run(void *state);
 void 			 display_null_finish(void *state);
 void 			 display_null_done(void *state);
 struct video_frame	*display_null_getf(void *state);
-int 			 display_null_putf(void *state, char *frame);
+int 			 display_null_putf(void *state, struct video_frame *frame);
 int                      display_null_reconfigure(void *state, struct video_desc desc);
 int                      display_null_get_property(void *state, int property, void *val, size_t *len);
 
diff --git a/src/video_display/quicktime.c b/src/video_display/quicktime.c
index 2a0e43cc5..9795a37ef 100644
--- a/src/video_display/quicktime.c
+++ b/src/video_display/quicktime.c
@@ -385,7 +385,7 @@ display_quicktime_getf(void *state)
         return &s->frame[0];
 }
 
-int display_quicktime_putf(void *state, char *frame)
+int display_quicktime_putf(void *state, struct video_frame *frame)
 {
         struct state_quicktime *s = (struct state_quicktime *)state;
 
diff --git a/src/video_display/quicktime.h b/src/video_display/quicktime.h
index 190467b4f..0915540fc 100644
--- a/src/video_display/quicktime.h
+++ b/src/video_display/quicktime.h
@@ -68,7 +68,7 @@ void                     display_quicktime_run(void *state);
 void                     display_quicktime_finish(void *state);
 void                     display_quicktime_done(void *state);
 struct video_frame      *display_quicktime_getf(void *state);
-int                      display_quicktime_putf(void *state, char *frame);
+int                      display_quicktime_putf(void *state, struct video_frame *frame);
 int                      display_quicktime_reconfigure(void *state, struct video_desc desc);
 int                      display_quicktime_get_property(void *state, int property, void *val, size_t *len);
 
diff --git a/src/video_display/sage.c b/src/video_display/sage.c
index bce838986..75d93cf42 100644
--- a/src/video_display/sage.c
+++ b/src/video_display/sage.c
@@ -269,7 +269,7 @@ struct video_frame *display_sage_getf(void *state)
         return s->frame;
 }
 
-int display_sage_putf(void *state, char *frame)
+int display_sage_putf(void *state, struct video_frame *frame)
 {
         int tmp;
         struct state_sage *s = (struct state_sage *)state;
diff --git a/src/video_display/sage.h b/src/video_display/sage.h
index 6dca8a2af..df4964248 100644
--- a/src/video_display/sage.h
+++ b/src/video_display/sage.h
@@ -58,7 +58,7 @@ void 			 display_sage_run(void *state);
 void 			 display_sage_done(void *state);
 void 			 display_sage_finish(void *state);
 struct video_frame	*display_sage_getf(void *state);
-int  			 display_sage_putf(void *state, char *frame);
+int  			 display_sage_putf(void *state, struct video_frame *frame);
 int                      display_sage_reconfigure(void *state, struct video_desc desc);
 int                      display_sage_get_property(void *state, int property, void *val, size_t *len);
 
diff --git a/src/video_display/sdl.c b/src/video_display/sdl.c
index f6fdbfe48..fdfc8a0b1 100644
--- a/src/video_display/sdl.c
+++ b/src/video_display/sdl.c
@@ -706,7 +706,7 @@ struct video_frame *display_sdl_getf(void *state)
         return s->frame;
 }
 
-int display_sdl_putf(void *state, char *frame)
+int display_sdl_putf(void *state, struct video_frame *frame)
 {
         int tmp;
         struct state_sdl *s = (struct state_sdl *)state;
diff --git a/src/video_display/sdl.h b/src/video_display/sdl.h
index 7dc408a05..593e9bcf6 100644
--- a/src/video_display/sdl.h
+++ b/src/video_display/sdl.h
@@ -57,7 +57,7 @@ void                    display_sdl_run (void *state);
 void                    display_sdl_finish(void *state);
 void                    display_sdl_done (void *state);
 struct video_frame *    display_sdl_getf (void *state);
-int                     display_sdl_putf (void *state, char *frame);
+int                     display_sdl_putf (void *state, struct video_frame *frame);
 
 int                     display_sdl_reconfigure(void *state, struct video_desc desc);
 int                     display_sdl_get_property(void *state, int property, void *val, size_t *len);