---
libavfilter/vf_interlace.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/libavfilter/vf_interlace.c b/libavfilter/vf_interlace.c
index d654739..2f4270c 100644
--- a/libavfilter/vf_interlace.c
+++ b/libavfilter/vf_interlace.c
@@ -181,6 +181,15 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
if (!s->cur || !s->next)
return 0;
+ if (s->cur->interlaced_frame) {
+ av_log(ctx, AV_LOG_WARNING, "video is already interlaced, adjusting
framerate only\n");
+ out = av_frame_clone(s->cur);
+ out->pts /= 2; // adjust pts to new framerate
+ ret = ff_filter_frame(outlink, out);
+ s->got_output = 1;
+ return ret;
+ }
+
tff = (s->scan == MODE_TFF);
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out)
--
1.7.9.5
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