---
libavformat/avformat.h | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 525f8ff..a0d8740 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -94,9 +94,15 @@ struct AVFormatContext;
* @{
* @ingroup libavf
* The metadata API allows libavformat to export metadata tags to a client
- * application using a sequence of key/value pairs. Like all strings in Libav,
- * metadata must be stored as UTF-8 encoded Unicode. Note that metadata
+ * application when demuxing. Conversely it allows a client application to
+ * set metadata when muxing.
+ *
+ * Metadata is exported or set as pairs of key/value strings in the 'metadata'
+ * fields of the AVFormatContext, AVStream, AVChapter and AVProgram structs
+ * using the @ref lavu_dict "AVDictionary" API. Like all strings in Libav,
+ * metadata is assumed to be UTF-8 encoded Unicode. Note that metadata
* exported by demuxers isn't checked to be valid UTF-8 in most cases.
+ *
* Important concepts to keep in mind:
* - Keys are unique; there can never be 2 tags with the same key. This is
* also meant semantically, i.e., a demuxer should not knowingly produce
--
1.7.7.3
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