@@ -1085,8 +1085,14 @@ static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)

 {

     AVFormatContext *is = ifile->ctx;

     AVFormatContext *os = ofile->ctx;

+    AVChapter **tmp;

     int i;

+    tmp = av_realloc(os->chapters, sizeof(*os->chapters) * (is->nb_chapters + os->nb_chapters));

+    if (!tmp)

+        return AVERROR(ENOMEM);

+    os->chapters = tmp;

+

     for (i = 0; i < is->nb_chapters; i++) {

         AVChapter *in_ch = is->chapters[i], *out_ch;

         int64_t ts_off   = av_rescale_q(ofile->start_time - ifile->ts_offset,

@@ -1112,11 +1118,7 @@ static int copy_chapters(InputFile *ifile, OutputFile *ofile, int copy_metadata)

         if (copy_metadata)

             av_dict_copy(&out_ch->metadata, in_ch->metadata, 0);

-        os->nb_chapters++;

-        os->chapters = av_realloc(os->chapters, sizeof(AVChapter) * os->nb_chapters);

-        if (!os->chapters)

-            return AVERROR(ENOMEM);

-        os->chapters[os->nb_chapters - 1] = out_ch;

+        os->chapters[os->nb_chapters++] = out_ch;

     }

     return 0;

 }