It does not make sense in the vast majority of use cases, no currently
defined AV_OPT_TYPE_FLAGS options in Libav set the range to anything
nontrivial, and many of those get it wrong (the "correct" range is
INT_MIN to INT_MAX so that the builtin constant "all" works).
---
 libavutil/opt.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavutil/opt.c b/libavutil/opt.c
index cba5b29..ef6a9de 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -61,7 +61,8 @@ static int read_number(const AVOption *o, void *dst, double 
*num, int *den, int6
 
 static int write_number(void *obj, const AVOption *o, void *dst, double num, 
int den, int64_t intnum)
 {
-    if (o->max*den < num*intnum || o->min*den > num*intnum) {
+    if (o->type != AV_OPT_TYPE_FLAGS &&
+        (o->max*den < num*intnum || o->min*den > num*intnum)) {
         av_log(obj, AV_LOG_ERROR, "Value %f for parameter '%s' out of range\n",
                num*intnum/den, o->name);
         return AVERROR(ERANGE);
-- 
1.7.10.4

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