diff options
| author | Moritz Barsnick <barsnick@gmx.net> | 2016-12-30 18:08:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2016-12-31 17:20:06 +0100 |
| commit | 6c442e1584599471d1d43df2880feb9bda215163 (patch) | |
| tree | 798a1f1f635199d7bec7738dd42a37441533174e | |
| parent | 1bfb4587a2e5b25ed15f742149e555efc8f305ae (diff) | |
| download | ffmpeg-6c442e1584599471d1d43df2880feb9bda215163.tar.gz | |
lavc/libmp3lame: add support for cutoff
Pass the cutoff option from lavc's avcodec_options[] to libmp3lame's
lowpass option, without allowing to adjust its default behavior.
Signed-off-by: Moritz Barsnick <barsnick@gmx.net>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | doc/encoders.texi | 4 | ||||
| -rw-r--r-- | libavcodec/libmp3lame.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/doc/encoders.texi b/doc/encoders.texi index cbb8d8ee25..5e311cb38a 100644 --- a/doc/encoders.texi +++ b/doc/encoders.texi @@ -817,6 +817,10 @@ Set algorithm quality. Valid arguments are integers in the 0-9 range, with 0 meaning highest quality but slowest, and 9 meaning fastest while producing the worst quality. +@item cutoff (@emph{--lowpass}) +Set lowpass cutoff frequency. If unspecified, the encoder dynamically +adjusts the cutoff. + @item reservoir Enable use of bit reservoir when set to 1. Default value is 1. LAME has this enabled by default, but can be overridden by use diff --git a/libavcodec/libmp3lame.c b/libavcodec/libmp3lame.c index e55aa8537a..5e26743f29 100644 --- a/libavcodec/libmp3lame.c +++ b/libavcodec/libmp3lame.c @@ -125,6 +125,10 @@ static av_cold int mp3lame_encode_init(AVCodecContext *avctx) } } + /* lowpass cutoff frequency */ + if (avctx->cutoff) + lame_set_lowpassfreq(s->gfp, avctx->cutoff); + /* do not get a Xing VBR header frame from LAME */ lame_set_bWriteVbrTag(s->gfp,0); |