@@ -393,6 +393,8 @@ static av_cold int init_subtitles(AVFilterContext *ctx)

     }

     if (ass->charenc)

         av_dict_set(&codec_opts, "sub_charenc", ass->charenc, 0);

+    if (LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57,25,100))

+        av_dict_set(&codec_opts, "sub_text_format", "ass", 0);

     ret = avcodec_open2(dec_ctx, dec, &codec_opts);

     if (ret < 0)

         goto end;

@@ -436,11 +438,17 @@ static av_cold int init_subtitles(AVFilterContext *ctx)

                 av_log(ctx, AV_LOG_WARNING, "Error decoding: %s (ignored)\n",

                        av_err2str(ret));

             } else if (got_subtitle) {

+                const int64_t start_time = av_rescale_q(sub.pts, AV_TIME_BASE_Q, av_make_q(1, 1000));

+                const int64_t duration   = sub.end_display_time;

                 for (i = 0; i < sub.num_rects; i++) {

                     char *ass_line = sub.rects[i]->ass;

                     if (!ass_line)

                         break;

-                    ass_process_data(ass->track, ass_line, strlen(ass_line));

+                    if (LIBAVCODEC_VERSION_INT < AV_VERSION_INT(57,25,100))

+                        ass_process_data(ass->track, ass_line, strlen(ass_line));

+                    else

+                        ass_process_chunk(ass->track, ass_line, strlen(ass_line),

+                                          start_time, duration);

                 }

             }

         }