[FFmpeg-cvslog] ffmpeg.c: Fallback to duration_dts, when duration_pts can't be determined.

[Sasi Inguva]

ffmpeg | branch: release/3.4 | Sasi Inguva <isasi-at-google.com at ffmpeg.org> | Tue Oct 10 10:36:58 2017 -0700| [8500de89ea9111e859c1ca8c51e7a3ed2ff76846] | committer: Michael Niedermayer

ffmpeg.c: Fallback to duration_dts, when duration_pts can't be determined.

This is required for FLV files, for which duration_pts comes out to be zero.

Signed-off-by: Sasi Inguva <isasi at google.com>
Reviewed-by: Thomas Mundt <tmundt75 at gmail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 2b006ccf8318d84101ed83b75df4c9682a963217)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8500de89ea9111e859c1ca8c51e7a3ed2ff76846
---

 fftools/ffmpeg.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index 6d64bc1043..3ee31473dc 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -2665,8 +2665,13 @@ static int process_input_packet(InputStream *ist, const AVPacket *pkt, int no_eo
                     ist->next_dts = AV_NOPTS_VALUE;
             }
 
-            if (got_output)
-                ist->next_pts += av_rescale_q(duration_pts, ist->st->time_base, AV_TIME_BASE_Q);
+            if (got_output) {
+                if (duration_pts > 0) {
+                    ist->next_pts += av_rescale_q(duration_pts, ist->st->time_base, AV_TIME_BASE_Q);
+                } else {
+                    ist->next_pts += duration_dts;
+                }
+            }
             break;
         case AVMEDIA_TYPE_SUBTITLE:
             if (repeating)