---
libavutil/frame.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/libavutil/frame.h b/libavutil/frame.h
index b2159d3..8685fbb 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -171,7 +171,9 @@ typedef struct AVFrame {
int format;
/**
- * 1 -> keyframe, 0-> not
+ * frame has no reference to other frames other than itself, so it
+ * may be used as a hint for correct input or output.
+ * This corresponds to H264 IDR frames or HEVC IRAP frames.
*/
int key_frame;
--
1.8.5.2 (Apple Git-48)
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