---
libavutil/frame.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/libavutil/frame.h b/libavutil/frame.h
index 392315f40f..f3e664bbc9 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -437,7 +437,12 @@ typedef struct AVFrame {
int quality;
/**
- * for some private data of the user
+ * Frame owner's private data.
+ *
+ * This field may be set by the code that allocates/owns the frame data.
+ * It is then not touched by any library functions, except:
+ * - it is copied to other references by av_frame_ref()
+ * - it is set to NULL when the frame is cleared by av_frame_unref()
*/
void *opaque;
--
2.28.0
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