[FFmpeg-cvslog] lavfi/separatefields: adjust tb to avoid rounding errors.

[Clément Bœsch]

ffmpeg | branch: master | Clément Bœsch <ubitux at gmail.com> | Wed Apr 10 02:38:07 2013 +0200| [d2e051e30c0ffc1e80a7e7e76ccdfbeb2956daa6] | committer: Clément Bœsch

lavfi/separatefields: adjust tb to avoid rounding errors.

Since the PTS need double accuracy, the timebase denominator is doubled
as well, and this new time base is used for the timestamp unit.

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d2e051e30c0ffc1e80a7e7e76ccdfbeb2956daa6
---

 libavfilter/vf_separatefields.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavfilter/vf_separatefields.c b/libavfilter/vf_separatefields.c
index 81f37cf..5849b62 100644
--- a/libavfilter/vf_separatefields.c
+++ b/libavfilter/vf_separatefields.c
@@ -41,11 +41,13 @@ static int config_props_output(AVFilterLink *outlink)
         return AVERROR_INVALIDDATA;
     }
 
+    outlink->time_base.num = inlink->time_base.num;
+    outlink->time_base.den = inlink->time_base.den * 2;
     outlink->frame_rate.num = inlink->frame_rate.num * 2;
     outlink->frame_rate.den = inlink->frame_rate.den;
     outlink->w = inlink->w;
     outlink->h = inlink->h / 2;
-    sf->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, inlink->time_base)));
+    sf->ts_unit = av_q2d(av_inv_q(av_mul_q(outlink->frame_rate, outlink->time_base)));
 
     return 0;
 }