avfilter/avfiltergraph: pass correct audio/video flags

Previously video flags where set for audio option.
Signed-off-by: Paul B Mahol <onemda@gmail.com>

libavfilter/avfiltergraph.c

@@ -43,17 +43,19 @@
 #include "thread.h"
 
 #define OFFSET(x) offsetof(AVFilterGraph, x)
-#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
+#define F AV_OPT_FLAG_FILTERING_PARAM
+#define V AV_OPT_FLAG_VIDEO_PARAM
+#define A AV_OPT_FLAG_AUDIO_PARAM
 static const AVOption filtergraph_options[] = {
     { "thread_type", "Allowed thread types", OFFSET(thread_type), AV_OPT_TYPE_FLAGS,
-        { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, FLAGS, "thread_type" },
-        { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = FLAGS, .unit = "thread_type" },
+        { .i64 = AVFILTER_THREAD_SLICE }, 0, INT_MAX, F|V|A, "thread_type" },
+        { "slice", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = AVFILTER_THREAD_SLICE }, .flags = F|V|A, .unit = "thread_type" },
     { "threads",     "Maximum number of threads", OFFSET(nb_threads),
-        AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, INT_MAX, FLAGS },
+        AV_OPT_TYPE_INT,   { .i64 = 0 }, 0, INT_MAX, F|V|A },
     {"scale_sws_opts"       , "default scale filter options"        , OFFSET(scale_sws_opts)        ,
-        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
+        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|V },
     {"aresample_swr_opts"   , "default aresample filter options"    , OFFSET(aresample_swr_opts)    ,
-        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS },
+        AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, F|A },
     { NULL },
 };