diff --git a/src/dump/file.c b/src/dump/file.c
index 5111054..43e7bcd 100644
--- a/src/dump/file.c
+++ b/src/dump/file.c
@@ -52,11 +52,11 @@ void us_output_file_write(void *v_output, const us_frame_s *frame) {
 		us_base64_encode(frame->data, frame->used, &output->base64_data, &output->base64_allocated);
 		fprintf(output->fp,
 			"{\"size\": %zu, \"width\": %u, \"height\": %u,"
-			" \"format\": %u, \"stride\": %u, \"online\": %u,"
+			" \"format\": %u, \"stride\": %u, \"online\": %u, \"key\": %u,"
 			" \"grab_ts\": %.3Lf, \"encode_begin_ts\": %.3Lf, \"encode_end_ts\": %.3Lf,"
 			" \"data\": \"%s\"}\n",
 			frame->used, frame->width, frame->height,
-			frame->format, frame->stride, frame->online,
+			frame->format, frame->stride, frame->online, frame->key,
 			frame->grab_ts, frame->encode_begin_ts, frame->encode_end_ts,
 			output->base64_data);
 	} else {
diff --git a/src/dump/main.c b/src/dump/main.c
index c59f689..d09bff9 100644
--- a/src/dump/main.c
+++ b/src/dump/main.c
@@ -251,7 +251,8 @@ static int _dump_sink(
 	long double last_ts = 0;
 
 	while (!_g_stop) {
-		const int error = us_memsink_client_get(sink, frame, key_required);
+		bool key_requested;
+		const int error = us_memsink_client_get(sink, frame, &key_requested, key_required);
 		if (error == 0) {
 			key_required = false;
 
@@ -259,11 +260,12 @@ static int _dump_sink(
 			const long long now_second = us_floor_ms(now);
 
 			char fourcc_str[8];
-			US_LOG_VERBOSE("Frame: size=%zu, res=%ux%u, fourcc=%s, stride=%u, online=%d, key=%d, latency=%.3Lf, diff=%.3Lf",
-				frame->used, frame->width, frame->height,
+			US_LOG_VERBOSE("Frame: res=%ux%u, fmt=%s, stride=%u, online=%d, key=%d, kr=%d, latency=%.3Lf, diff=%.3Lf, size=%zu",
+				frame->width, frame->height,
 				us_fourcc_to_string(frame->format, fourcc_str, 8),
-				frame->stride, frame->online, frame->key,
-				now - frame->grab_ts, (last_ts ? now - last_ts : 0));
+				frame->stride, frame->online, frame->key, key_requested,
+				now - frame->grab_ts, (last_ts ? now - last_ts : 0),
+				frame->used);
 			last_ts = now;
 
 			US_LOG_DEBUG("       grab_ts=%.3Lf, encode_begin_ts=%.3Lf, encode_end_ts=%.3Lf",
diff --git a/src/libs/memsink.c b/src/libs/memsink.c
index 739412f..c35cfaa 100644
--- a/src/libs/memsink.c
+++ b/src/libs/memsink.c
@@ -136,9 +136,7 @@ int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *con
 		if (sink->mem->key_requested && frame->key) {
 			sink->mem->key_requested = false;
 		}
-		if (key_requested != NULL) {
-			*key_requested = sink->mem->key_requested;
-		}
+		*key_requested = sink->mem->key_requested;
 
 		memcpy(sink->mem->data, frame->data, frame->used);
 		sink->mem->used = frame->used;
@@ -166,7 +164,7 @@ int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *con
 	return 0;
 }
 
-int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool key_required) { // cppcheck-suppress unusedFunction
+int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *const key_requested, bool key_required) { // cppcheck-suppress unusedFunction
 	assert(!sink->server); // Client only
 
 	if (us_flock_timedwait_monotonic(sink->fd, sink->timeout) < 0) {
@@ -189,6 +187,7 @@ int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool key_requir
 			sink->last_id = sink->mem->id;
 			us_frame_set_data(frame, sink->mem->data, sink->mem->used);
 			US_FRAME_COPY_META(sink->mem, frame);
+			*key_requested = sink->mem->key_requested;
 			retval = 0;
 		}
 		sink->mem->last_client_ts = us_get_now_monotonic();
diff --git a/src/libs/memsink.h b/src/libs/memsink.h
index 79cf3c8..16d0aaf 100644
--- a/src/libs/memsink.h
+++ b/src/libs/memsink.h
@@ -65,4 +65,4 @@ void us_memsink_destroy(us_memsink_s *sink);
 bool us_memsink_server_check(us_memsink_s *sink, const us_frame_s *frame);
 int us_memsink_server_put(us_memsink_s *sink, const us_frame_s *frame, bool *const key_requested);
 
-int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool key_required);
+int us_memsink_client_get(us_memsink_s *sink, us_frame_s *frame, bool *const key_requested, bool key_required);
diff --git a/src/ustreamer/stream.c b/src/ustreamer/stream.c
index fdf31dd..94a5279 100644
--- a/src/ustreamer/stream.c
+++ b/src/ustreamer/stream.c
@@ -32,7 +32,8 @@ static void _stream_expose_frame(us_stream_s *stream, us_frame_s *frame, unsigne
 
 #define _SINK_PUT(x_sink, x_frame) { \
 		if (stream->x_sink && us_memsink_server_check(stream->x_sink, x_frame)) {\
-			us_memsink_server_put(stream->x_sink, x_frame, NULL); \
+			bool m_key_requested; /* Unused */ \
+			us_memsink_server_put(stream->x_sink, x_frame, &m_key_requested); \
 		} \
 	}