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lavfi/separatefields: adjust tb to avoid rounding errors.

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Since the PTS need double accuracy, the timebase denominator is doubled
as well, and this new time base is used for the timestamp unit.
This commit is contained in:
Clément Bœsch
2013-04-10 02:38:07 +02:00
parent 685617ac29
commit d2e051e30c
1 changed files with 3 additions and 1 deletions
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4
libavfilter/vf_separatefields.c
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@ -41,11 +41,13 @@ static int config_props_output(AVFilterLink *outlink)
return AVERROR_INVALIDDATA; 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.num = inlink->frame_rate.num * 2;
outlink->frame_rate.den = inlink->frame_rate.den; outlink->frame_rate.den = inlink->frame_rate.den;
outlink->w = inlink->w; outlink->w = inlink->w;
outlink->h = inlink->h / 2; 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; return 0;
} }