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-rw-r--r--libavformat/avformat.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 073ca67afc..2bf03e1bd8 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -547,7 +547,12 @@ typedef struct AVIndexEntry {
*/
typedef struct AVStream {
int index; /**< stream index in AVFormatContext */
- int id; /**< format-specific stream ID */
+ /**
+ * Format-specific stream ID.
+ * decoding: set by libavformat
+ * encoding: set by the user
+ */
+ int id;
AVCodecContext *codec; /**< codec context */
/**
* Real base framerate of the stream.