@@ -91,7 +91,7 @@ char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigne

     ss = frame_num / fps        % 60;

     mm = frame_num / (fps*60)   % 60;

     hh = frame_num / (fps*3600) % 24;

-    snprintf(buf, sizeof("hh:mm:ss.ff"), "%02d:%02d:%02d%c%02d",

+    snprintf(buf, 16, "%02d:%02d:%02d%c%02d",

              hh, mm, ss, tc->drop ? ';' : ':', ff);

     return buf;

 }

@@ -67,8 +67,8 @@ uint32_t avpriv_framenum_to_smpte_timecode(unsigned frame, int fps, int drop);

  * @param tc    Timecode struct pointer

  * @param frame Frame id (timecode frame is computed with tc->start+frame)

  * @return a pointer to the buf parameter

- * @note  buf must have enough space to store the timecode representation

- *        (sizeof("hh:mm:ss.ff"))

+ * @note  buf must have enough space to store the timecode representation: 16

+ *        bytes is the minimum required size.

  */

 char *avpriv_timecode_to_string(char *buf, const struct ff_timecode *tc, unsigned frame);

@@ -731,7 +731,7 @@ static int draw_text(AVFilterContext *ctx, AVFilterBufferRef *picref,

 #if CONFIG_AVCODEC

     if (dtext->tc.str) {

-        char tcbuf[sizeof("hh:mm:ss.ff")];

+        char tcbuf[16];

         avpriv_timecode_to_string(tcbuf, &dtext->tc, dtext->frame_id++);

         buf = av_asprintf("%s%s", dtext->text, tcbuf);

     }