From 5ccd8f492bc807dbf084bf13f3f288b2f4ac41f1 Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Mon, 9 May 2022 21:59:03 +0200 Subject: avfilter/af_crossfeed: add option for linear phase filtering But at expense of additional delay. --- doc/filters.texi | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'doc') diff --git a/doc/filters.texi b/doc/filters.texi index 468c277798..22a88d7f58 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -4205,6 +4205,13 @@ Set input gain. Default is 0.9. @item level_out Set output gain. Default is 1. + +@item block_size +Set block size used for reverse IIR processing. If this value is set to high enough +value (higher than impulse response length truncated when reaches near zero values) filtering +will become linear phase otherwise if not big enough it will just produce nasty artifacts. + +Note that filter delay will be exactly this many samples when set to non-zero value. @end table @subsection Commands -- cgit v1.2.3