diff --git a/avconv.c b/avconv.c
index b29f2006a7..13968da4f9 100644
--- a/avconv.c
+++ b/avconv.c
@@ -428,13 +428,7 @@ static void do_audio_out(AVFormatContext *s, OutputStream *ost,
     }
 
     if (got_packet) {
-        if (pkt.pts != AV_NOPTS_VALUE)
-            pkt.pts      = av_rescale_q(pkt.pts,      enc->time_base, ost->st->time_base);
-        if (pkt.dts != AV_NOPTS_VALUE)
-            pkt.dts      = av_rescale_q(pkt.dts,      enc->time_base, ost->st->time_base);
-        if (pkt.duration > 0)
-            pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
-
+        av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
         write_frame(s, &pkt, ost);
     }
 }
@@ -587,11 +581,7 @@ static void do_video_out(AVFormatContext *s,
         }
 
         if (got_packet) {
-            if (pkt.pts != AV_NOPTS_VALUE)
-                pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
-            if (pkt.dts != AV_NOPTS_VALUE)
-                pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
-
+            av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
             write_frame(s, &pkt, ost);
             *frame_size = pkt.size;
 
@@ -1044,12 +1034,7 @@ static void flush_encoders(void)
                     stop_encoding = 1;
                     break;
                 }
-                if (pkt.pts != AV_NOPTS_VALUE)
-                    pkt.pts = av_rescale_q(pkt.pts, enc->time_base, ost->st->time_base);
-                if (pkt.dts != AV_NOPTS_VALUE)
-                    pkt.dts = av_rescale_q(pkt.dts, enc->time_base, ost->st->time_base);
-                if (pkt.duration > 0)
-                    pkt.duration = av_rescale_q(pkt.duration, enc->time_base, ost->st->time_base);
+                av_packet_rescale_ts(&pkt, enc->time_base, ost->st->time_base);
                 write_frame(os, &pkt, ost);
             }
 
diff --git a/doc/examples/output.c b/doc/examples/output.c
index dd0e6a224e..0239791e3d 100644
--- a/doc/examples/output.c
+++ b/doc/examples/output.c
@@ -362,14 +362,7 @@ static void write_video_frame(AVFormatContext *oc, AVStream *st)
         ret = avcodec_encode_video2(c, &pkt, picture, &got_packet);
         /* If size is zero, it means the image was buffered. */
         if (!ret && got_packet && pkt.size) {
-            if (pkt.pts != AV_NOPTS_VALUE) {
-                pkt.pts = av_rescale_q(pkt.pts,
-                                       c->time_base, st->time_base);
-            }
-            if (pkt.dts != AV_NOPTS_VALUE) {
-                pkt.dts = av_rescale_q(pkt.dts,
-                                       c->time_base, st->time_base);
-            }
+            av_packet_rescale_ts(&pkt, c->time_base, st->time_base);
             pkt.stream_index = st->index;
 
             /* Write the compressed frame to the media file. */