X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Fmpegenc.c;h=b467bb5de5fe21d567fd5a9b6486d5cbf2c777ac;hb=1ac5a8d7e3343718b0e86b44013742b7ca413c38;hp=e2a96bc63128922f24461ea5560871dd898a5c7a;hpb=98275283d52622c16a6d59f508de7d40216e8b63;p=ffmpeg

diff --git a/libavformat/mpegenc.c b/libavformat/mpegenc.c
index e2a96bc6312..b467bb5de5f 100644
--- a/libavformat/mpegenc.c
+++ b/libavformat/mpegenc.c
@@ -482,7 +482,7 @@ static int mpeg_mux_init(AVFormatContext *ctx)
         stream->packet_number = 0;
     }
     s->system_header_size = get_system_header_size(ctx);
-    s->last_scr = 0;
+    s->last_scr = AV_NOPTS_VALUE;
     return 0;
  fail:
     for(i=0;i<ctx->nb_streams;i++) {
@@ -1061,13 +1061,22 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
     pts= pkt->pts;
     dts= pkt->dts;
 
-    if(pts != AV_NOPTS_VALUE) pts += 2*preload;
-    if(dts != AV_NOPTS_VALUE){
-        if(!s->last_scr)
-            s->last_scr= dts + preload;
-        dts += 2*preload;
+    if (s->last_scr == AV_NOPTS_VALUE) {
+        if (dts == AV_NOPTS_VALUE || (dts < preload && ctx->avoid_negative_ts) || s->is_dvd) {
+            if (dts != AV_NOPTS_VALUE)
+                s->preload += av_rescale(-dts, AV_TIME_BASE, 90000);
+            s->last_scr = 0;
+        } else {
+            s->last_scr = dts - preload;
+            s->preload = 0;
+        }
+        preload = av_rescale(s->preload, 90000, AV_TIME_BASE);
+        av_log(ctx, AV_LOG_DEBUG, "First SCR: %"PRId64" First DTS: %"PRId64"\n", s->last_scr, dts + preload);
     }
 
+    if (dts != AV_NOPTS_VALUE) dts += preload;
+    if (pts != AV_NOPTS_VALUE) pts += preload;
+
     av_dlog(ctx, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n",
             dts / 90000.0, pts / 90000.0, pkt->flags,
             pkt->stream_index, pts != AV_NOPTS_VALUE);