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| author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-07-30 18:23:24 +0200 |
|---|---|---|
| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2011-07-30 18:31:10 +0200 |
| commit | 3b5ddf07c0c4ab6a0d347d92ff8d9cfbac6b66ed (patch) | |
| tree | 136d82ca4fe44cd2c9e001f2833a299223b971f4 | |
| parent | 9959a76782861a438f5a007086509bbc507022d8 (diff) | |
| download | ffmpeg-3b5ddf07c0c4ab6a0d347d92ff8d9cfbac6b66ed.tar.gz | |
vf_pad: add an example employing the sar variable
| -rw-r--r-- | doc/filters.texi | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/doc/filters.texi b/doc/filters.texi index 68a82b79e8..27474024a9 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -1264,6 +1264,12 @@ pad="max(iw\,ih):ow:(ow-iw)/2:(oh-ih)/2" # pad the input to get a final w/h ratio of 16:9 pad="ih*16/9:ih:(ow-iw)/2:(oh-ih)/2" +# for anamorphic video, in order to set the output display aspect ratio, +# it is necessary to use sar in the expression, according to the relation: +# (ih * X / ih) * sar = output_dar +# X = output_dar / sar +pad="ih*16/9/sar:ih:(ow-iw)/2:(oh-ih)/2" + # double output size and put the input video in the bottom-right # corner of the output padded area pad="2*iw:2*ih:ow-iw:oh-ih" |