diff --git a/libavfilter/vf_showinfo.c b/libavfilter/vf_showinfo.c
index 6c412e5abc..dd97843b96 100644
--- a/libavfilter/vf_showinfo.c
+++ b/libavfilter/vf_showinfo.c
@@ -35,13 +35,6 @@ typedef struct {
     unsigned int frame;
 } ShowInfoContext;
 
-static av_cold int init(AVFilterContext *ctx, const char *args)
-{
-    ShowInfoContext *showinfo = ctx->priv;
-    showinfo->frame = 0;
-    return 0;
-}
-
 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
 {
     AVFilterContext *ctx = inlink->dst;
@@ -111,7 +104,6 @@ AVFilter avfilter_vf_showinfo = {
     .description = NULL_IF_CONFIG_SMALL("Show textual information for each video frame."),
 
     .priv_size = sizeof(ShowInfoContext),
-    .init      = init,
 
     .inputs    = avfilter_vf_showinfo_inputs,
 
diff --git a/libavutil/opt.c b/libavutil/opt.c
index f91d18b198..e1384022ef 100644
--- a/libavutil/opt.c
+++ b/libavutil/opt.c
@@ -177,7 +177,7 @@ static int set_string(void *obj, const AVOption *o, const char *val, uint8_t **d
                               opt->type == AV_OPT_TYPE_INT) ? \
                              opt->default_val.i64 : opt->default_val.dbl)
 
-static int set_string_number(void *obj, const AVOption *o, const char *val, void *dst)
+static int set_string_number(void *obj, void *target_obj, const AVOption *o, const char *val, void *dst)
 {
     int ret = 0, notfirst = 0;
     for (;;) {
@@ -200,7 +200,7 @@ static int set_string_number(void *obj, const AVOption *o, const char *val, void
         buf[i] = 0;
 
         {
-            const AVOption *o_named = av_opt_find(obj, buf, o->unit, 0, 0);
+            const AVOption *o_named = av_opt_find(target_obj, buf, o->unit, 0, 0);
             if (o_named && o_named->type == AV_OPT_TYPE_CONST)
                 d = DEFAULT_NUMVAL(o_named);
             else if (!strcmp(buf, "default")) d = DEFAULT_NUMVAL(o);
@@ -268,7 +268,7 @@ int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
     case AV_OPT_TYPE_INT64:
     case AV_OPT_TYPE_FLOAT:
     case AV_OPT_TYPE_DOUBLE:
-    case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, o, val, dst);
+    case AV_OPT_TYPE_RATIONAL: return set_string_number(obj, target_obj, o, val, dst);
     case AV_OPT_TYPE_IMAGE_SIZE:
         if (!val || !strcmp(val, "none")) {
             *(int *)dst = *((int *)dst + 1) = 0;
@@ -321,7 +321,7 @@ int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
     {\
         if (!o || o->type != opttype)\
             return AVERROR(EINVAL);\
-        return set_string_number(obj, o, val, name ## _out);\
+        return set_string_number(obj, obj, o, val, name ## _out);\
     }
 
 OPT_EVAL_NUMBER(flags,  AV_OPT_TYPE_FLAGS,    int)