hlsenc: Append the last incomplete segment when closing the output

Also avoid comparing NOPTS values.

Bug-id: 551
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/hlsenc.c

@@ -49,6 +49,7 @@ typedef struct HLSContext {
     int has_video;
     int64_t start_pts;
     int64_t end_pts;
+    int64_t duration;      // last segment duration computed so far, in seconds
     int nb_entries;
     ListEntry *list;
     ListEntry *end_list;
@@ -261,16 +262,20 @@ static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
         can_split = st->codec->codec_type == AVMEDIA_TYPE_VIDEO &&
                     pkt->flags & AV_PKT_FLAG_KEY;
     }
+    if (pkt->pts == AV_NOPTS_VALUE)
+        can_split = 0;
+    else
+        hls->duration = av_rescale(pkt->pts - hls->end_pts,
+                                   st->time_base.num, st->time_base.den);
 
     if (can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
                                    end_pts, AV_TIME_BASE_Q) >= 0) {
-        ret = append_entry(hls, av_rescale(pkt->pts - hls->end_pts,
-                                           st->time_base.num,
-                                           st->time_base.den));
+        ret = append_entry(hls, hls->duration);
         if (ret)
             return ret;
 
         hls->end_pts = pkt->pts;
+        hls->duration = 0;
 
         av_write_frame(oc, NULL); /* Flush any buffered data */
         avio_close(oc->pb);
@@ -300,6 +305,7 @@ static int hls_write_trailer(struct AVFormatContext *s)
     avio_closep(&oc->pb);
     avformat_free_context(oc);
     av_free(hls->basename);
+    append_entry(hls, hls->duration);
     hls_window(s, 1);
 
     free_entries(hls);