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| author | Tristan Schmelcher <tschmelcher@google.com> | 2022-09-26 17:14:09 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2022-09-27 00:07:43 +0200 |
| commit | 179830108dbeb1c6b73105ae2234cf04874728b4 (patch) | |
| tree | 6a2e97cb5667d9a322d1bfd1f61082244a786811 /libavfilter/scale_eval.h | |
| parent | 543a46b4b2ff0f02fa85e45d7b7bcda19d3be9b4 (diff) | |
| download | ffmpeg-179830108dbeb1c6b73105ae2234cf04874728b4.tar.gz | |
avfilter/scale_eval: Reduce rounding error.
When force_original_aspect_ratio and force_divisible_by are both
used, dimensions are now rounded to the nearest allowed multiple of
force_divisible_by rather than first rounding to the nearest integer and
then rounding in a static direction. This results in less distortion of
the aspect ratio.
Reviewed-by: Thierry Foucu <tfoucu@google.com>
Signed-off-by: Tristan Schmelcher <tschmelcher@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavfilter/scale_eval.h')
| -rw-r--r-- | libavfilter/scale_eval.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libavfilter/scale_eval.h b/libavfilter/scale_eval.h index fceb023fec..2eb6970aad 100644 --- a/libavfilter/scale_eval.h +++ b/libavfilter/scale_eval.h @@ -38,7 +38,8 @@ int ff_scale_eval_dimensions(void *ctx, * Transform evaluated width and height obtained from ff_scale_eval_dimensions * into actual target width and height for scaling. Adjustment can occur if one * or both of the evaluated values are of the form '-n' or if - * force_original_aspect_ratio is set. + * force_original_aspect_ratio is set. force_divisible_by is used only when + * force_original_aspect_ratio is set and must be at least 1. * * Returns 0. */ |