diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index ade8df6abc..ea25dd0d64 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -1971,6 +1971,12 @@ static void do_streamcopy(InputStream *ist, OutputStream *ost, const AVPacket *p
     int64_t ost_tb_start_time = av_rescale_q(start_time, AV_TIME_BASE_Q, ost->mux_timebase);
     AVPacket opkt;
 
+    // EOF: flush output bitstream filters.
+    if (!pkt) {
+        output_packet(of, &opkt, ost, 1);
+        return;
+    }
+
     av_init_packet(&opkt);
 
     if ((!ost->frame_number && !(pkt->flags & AV_PKT_FLAG_KEY)) &&
@@ -2706,7 +2712,7 @@ static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eo
                 AVRational time_base_q = AV_TIME_BASE_Q;
                 int64_t next_dts = av_rescale_q(ist->next_dts, time_base_q, av_inv_q(ist->framerate));
                 ist->next_dts = av_rescale_q(next_dts + 1, av_inv_q(ist->framerate), time_base_q);
-            } else if (pkt->duration) {
+            } else if (pkt && pkt->duration) {
                 ist->next_dts += av_rescale_q(pkt->duration, ist->st->time_base, AV_TIME_BASE_Q);
             } else if(ist->dec_ctx->framerate.num != 0) {
                 int ticks= av_stream_get_parser(ist->st) ? av_stream_get_parser(ist->st)->repeat_pict + 1 : ist->dec_ctx->ticks_per_frame;
@@ -2719,7 +2725,7 @@ static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eo
         ist->pts = ist->dts;
         ist->next_pts = ist->next_dts;
     }
-    for (i = 0; pkt && i < nb_output_streams; i++) {
+    for (i = 0; i < nb_output_streams; i++) {
         OutputStream *ost = output_streams[i];
 
         if (!check_output_constraints(ist, ost) || ost->encoding_needed)
@@ -4600,7 +4606,7 @@ static int transcode(void)
     /* at the end of stream, we must flush the decoder buffers */
     for (i = 0; i < nb_input_streams; i++) {
         ist = input_streams[i];
-        if (!input_files[ist->file_index]->eof_reached && ist->decoding_needed) {
+        if (!input_files[ist->file_index]->eof_reached) {
             process_input_packet(ist, NULL, 0);
         }
     }