lavfi/blend: fix SW/SH calculation

Signed-off-by: Paul B Mahol <onemda@gmail.com>
12 years ago · af12573938
parent bca59d7745
commit af12573938
1 changed files with 2 additions and 2 deletions
--- a/libavfilter/vf_blend.c
+++ b/libavfilter/vf_blend.c
@ -383,8 +383,8 @@ static void blend_frame(AVFilterContext *ctx,
        param->values[VAR_T]  = dst_buf->pts == AV_NOPTS_VALUE ? NAN : dst_buf->pts * av_q2d(inlink->time_base);
        param->values[VAR_W]  = outw;
        param->values[VAR_H]  = outh;
-        param->values[VAR_SW] = outw / dst_buf->width;
-        param->values[VAR_SH] = outh / dst_buf->height;
+        param->values[VAR_SW] = outw / (double)dst_buf->width;
+        param->values[VAR_SH] = outh / (double)dst_buf->height;
        param->blend(top, top_buf->linesize[plane],
                     bottom, bottom_buf->linesize[plane],
                     dst, dst_buf->linesize[plane], outw, outh, param);