ffplay: disallow seeking before the start of the file

In timestamp based seeking we update the external clock to the seek target,
therefore we should use sane timestamps even if libavformat could handle
seeking before the start of the file.

Signed-off-by: Marton Balint <cus@passwd.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/ffplay.c b/ffplay.c
index 5ba5164173..c5ad70fd43 100644
--- a/ffplay.c
+++ b/ffplay.c
@@ -2984,6 +2984,8 @@ static void event_loop(VideoState *cur_stream)
                     } else {
                         pos = get_master_clock(cur_stream);
                         pos += incr;
+                        if (cur_stream->ic->start_time != AV_NOPTS_VALUE && pos < cur_stream->ic->start_time / (double)AV_TIME_BASE)
+                            pos = cur_stream->ic->start_time / (double)AV_TIME_BASE;
                         stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE), (int64_t)(incr * AV_TIME_BASE), 0);
                     }
                 break;