diff --git a/libavfilter/buffersink.h b/libavfilter/buffersink.h
index 73926a4539..cf6bd69612 100644
--- a/libavfilter/buffersink.h
+++ b/libavfilter/buffersink.h
@@ -63,6 +63,13 @@ AVABufferSinkParams *av_abuffersink_params_alloc(void);
  */
 #define AV_BUFFERSINK_FLAG_PEEK 1
 
+/**
+ * Tell av_buffersink_get_buffer_ref() not to request a frame fom its input.
+ * If a frame is already buffered, it is read (and removed from the buffer),
+ * but if no frame is present, return AVERROR(EAGAIN).
+ */
+#define AV_BUFFERSINK_FLAG_NO_REQUEST 2
+
 /**
  * Get an audio/video buffer data from buffer_sink and put it in bufref.
  *
diff --git a/libavfilter/sink_buffer.c b/libavfilter/sink_buffer.c
index 8eb695e167..b0cc519217 100644
--- a/libavfilter/sink_buffer.c
+++ b/libavfilter/sink_buffer.c
@@ -126,6 +126,8 @@ int av_buffersink_get_buffer_ref(AVFilterContext *ctx,
 
     /* no picref available, fetch it from the filterchain */
     if (!av_fifo_size(buf->fifo)) {
+        if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST)
+            return AVERROR(EAGAIN);
         if ((ret = avfilter_request_frame(inlink)) < 0)
             return ret;
     }
diff --git a/libavfilter/version.h b/libavfilter/version.h
index 361155fe33..0f7ea501e6 100644
--- a/libavfilter/version.h
+++ b/libavfilter/version.h
@@ -29,8 +29,8 @@
 #include "libavutil/avutil.h"
 
 #define LIBAVFILTER_VERSION_MAJOR  2
-#define LIBAVFILTER_VERSION_MINOR 71
-#define LIBAVFILTER_VERSION_MICRO 102
+#define LIBAVFILTER_VERSION_MINOR 72
+#define LIBAVFILTER_VERSION_MICRO 100
 
 #define LIBAVFILTER_VERSION_INT AV_VERSION_INT(LIBAVFILTER_VERSION_MAJOR, \
                                                LIBAVFILTER_VERSION_MINOR, \