avfilter/split: use av_asprintf()

libavfilter/split.c

@@ -26,6 +26,7 @@
 #include <stdio.h>
 
 #include "libavutil/attributes.h"
+#include "libavutil/avstring.h"
 #include "libavutil/internal.h"
 #include "libavutil/mem.h"
 #include "libavutil/opt.h"
@@ -48,12 +49,10 @@ static av_cold int split_init(AVFilterContext *ctx)
     int i, ret;
 
     for (i = 0; i < s->nb_outputs; i++) {
-        char name[32];
         AVFilterPad pad = { 0 };
 
-        snprintf(name, sizeof(name), "output%d", i);
         pad.type = ctx->filter->inputs[0].type;
-        pad.name = av_strdup(name);
+        pad.name = av_asprintf("output%d", i);
         if (!pad.name)
             return AVERROR(ENOMEM);