[FFmpeg-devel] [PATCH] avfilter: Fix handling duplicate classes

[Michael Niedermayer]

Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
---
 libavfilter/avfilter.c |    9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libavfilter/avfilter.c b/libavfilter/avfilter.c
index f392613..35250f1 100644
--- a/libavfilter/avfilter.c
+++ b/libavfilter/avfilter.c
@@ -477,8 +477,13 @@ static const AVClass *filter_child_class_next(const AVClass *prev)
 
     /* find next filter with specific options */
     while ((f = avfilter_next(f)))
-        if (f->priv_class)
-            return f->priv_class;
+        if (f->priv_class) {
+            AVFilter *f2 = NULL;
+            while ((f2 = avfilter_next(f2)) && f->priv_class!=f2->priv_class)
+                ;
+            if(f==f2)
+                return f->priv_class;
+        }
 
     return NULL;
 }
-- 
1.7.9.5