diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 9a3fdc636d..98e175068e 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -845,10 +845,11 @@ static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int u
 
     if (debug_ts) {
         av_log(NULL, AV_LOG_INFO, "muxer <- type:%s "
-                "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s size:%d\n",
+                "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s size:%d\n",
                 av_get_media_type_string(ost->enc_ctx->codec_type),
                 av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->st->time_base),
                 av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->st->time_base),
+                av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ost->st->time_base),
                 pkt->size
               );
     }
@@ -1036,9 +1037,11 @@ static void do_audio_out(OutputFile *of, OutputStream *ost,
 
         if (debug_ts) {
             av_log(NULL, AV_LOG_INFO, "encoder -> type:audio "
-                   "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
+                   "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s "
+                   "duration:%s duration_time:%s\n",
                    av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &enc->time_base),
-                   av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base));
+                   av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base),
+                   av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base));
         }
 
         output_packet(of, pkt, ost, 0);
@@ -1360,9 +1363,11 @@ static void do_video_out(OutputFile *of,
 
             if (debug_ts) {
                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
-                       "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
+                       "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s "
+                       "duration:%s duration_time:%s\n",
                        av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &enc->time_base),
-                       av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base));
+                       av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &enc->time_base),
+                       av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &enc->time_base));
             }
 
             if (pkt->pts == AV_NOPTS_VALUE && !(enc->codec->capabilities & AV_CODEC_CAP_DELAY))
@@ -1372,9 +1377,11 @@ static void do_video_out(OutputFile *of,
 
             if (debug_ts) {
                 av_log(NULL, AV_LOG_INFO, "encoder -> type:video "
-                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s\n",
+                    "pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s "
+                    "duration:%s duration_time:%s\n",
                     av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ost->mux_timebase),
-                    av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->mux_timebase));
+                    av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ost->mux_timebase),
+                    av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ost->mux_timebase));
             }
 
             frame_size = pkt->size;
@@ -4304,12 +4311,13 @@ static int process_input(int file_index)
 
     if (debug_ts) {
         av_log(NULL, AV_LOG_INFO, "demuxer -> ist_index:%d type:%s "
-               "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
+               "next_dts:%s next_dts_time:%s next_pts:%s next_pts_time:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s off:%s off_time:%s\n",
                ifile->ist_index + pkt->stream_index, av_get_media_type_string(ist->dec_ctx->codec_type),
                av_ts2str(ist->next_dts), av_ts2timestr(ist->next_dts, &AV_TIME_BASE_Q),
                av_ts2str(ist->next_pts), av_ts2timestr(ist->next_pts, &AV_TIME_BASE_Q),
                av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ist->st->time_base),
                av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ist->st->time_base),
+               av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ist->st->time_base),
                av_ts2str(input_files[ist->file_index]->ts_offset),
                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
     }
@@ -4460,10 +4468,11 @@ static int process_input(int file_index)
         ifile->last_ts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);
 
     if (debug_ts) {
-        av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s off:%s off_time:%s\n",
+        av_log(NULL, AV_LOG_INFO, "demuxer+ffmpeg -> ist_index:%d type:%s pkt_pts:%s pkt_pts_time:%s pkt_dts:%s pkt_dts_time:%s duration:%s duration_time:%s off:%s off_time:%s\n",
                ifile->ist_index + pkt->stream_index, av_get_media_type_string(ist->dec_ctx->codec_type),
                av_ts2str(pkt->pts), av_ts2timestr(pkt->pts, &ist->st->time_base),
                av_ts2str(pkt->dts), av_ts2timestr(pkt->dts, &ist->st->time_base),
+               av_ts2str(pkt->duration), av_ts2timestr(pkt->duration, &ist->st->time_base),
                av_ts2str(input_files[ist->file_index]->ts_offset),
                av_ts2timestr(input_files[ist->file_index]->ts_offset, &AV_TIME_BASE_Q));
     }
