avformat/utils: Free new streams in ff_add_attached_pic on error

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/libavformat/internal.h b/libavformat/internal.h
index b3c5d8a1d5..a6987619f7 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -678,6 +678,9 @@ int ff_read_packet(AVFormatContext *s, AVPacket *pkt);
  * @param buf  if set, it contains the data and size information to be used
  *             for the attached pic; if unset, data is read from pb.
  * @param size the size of the data to read if buf is unset.
+ *
+ * @return 0 on success, < 0 on error. On error, this function removes
+ *         the stream it has added (if any).
  */
 int ff_add_attached_pic(AVFormatContext *s, AVStream *st, AVIOContext *pb,
                         AVBufferRef **buf, int size);