avformat: Fix decoder search in find stream info

Fixes Ticket3548

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 6 insertions, 0 deletions

diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index a1185cafcb..7d2db6a3a0 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -891,6 +891,12 @@ typedef struct AVStream {
         double (*duration_error)[2][MAX_STD_TIMEBASES];
         int64_t codec_info_duration;
         int64_t codec_info_duration_fields;
+
+        /**
+         * 0  -> decoder has not been searched for yet.
+         * >0 -> decoder found
+         * <0 -> decoder with codec_id == -found_decoder has not been found
+         */
         int found_decoder;
 
         int64_t last_duration;