Expressions for parameter fontsize of video filter drawtext have been supported since commit 6442e4ab3c (avfilter/vf_drawtext: added expr evaluation to drawtext fontsize, 2017-04-18).
Add an example of using such expressions to documentation. Signed-off-by: Andrei Rybak <rybak....@gmail.com> --- doc/filters.texi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/doc/filters.texi b/doc/filters.texi index fb8757ff8f..ec386a6c55 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -10233,6 +10233,12 @@ Use fontconfig to set the font. Note that the colons need to be escaped. drawtext='fontfile=Linux Libertine O-40\:style=Semibold:text=FFmpeg' @end example +@item +Draw "Test Text" of size, dependent on height of the video. +@example +drawtext="text='Test Text': fontsize=h/30: x=(w-text_w)/2: y=(h-text_h*2)" +@end example + @item Print the date of a real-time encoding (see strftime(3)): @example -- 2.25.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
