/**
* Copy the frame properties of src to dst, without copying the actual
* image data.
+ *
+ * @return 0 on success, a negative number on error.
*/
int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src);
+/**
+ * Copy the frame properties and data pointers of src to dst, without copying
+ * the actual data.
+ *
+ * @return 0 on success, a negative number on error.
+ */
+int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src);
+
/**
* Create and return a picref reference from the data and properties
* contained in frame.
int avfilter_fill_frame_from_buffer_ref(AVFrame *frame,
const AVFilterBufferRef *ref);
+/**
+ * Add frame data to buffer_src.
+ *
+ * @param buffer_src pointer to a buffer source context
+ * @param frame a frame, or NULL to mark EOF
+ * @param flags a combination of AV_BUFFERSRC_FLAG_*
+ * @return >= 0 in case of success, a negative AVERROR code
+ * in case of failure
+ */
+int av_buffersrc_add_frame(AVFilterContext *buffer_src,
+ const AVFrame *frame, int flags);
+
/**
* Add frame data to buffer_src.
*