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| author | Alexander Strasser <eclipse7@gmx.net> | 2012-12-25 23:14:09 +0100 |
|---|---|---|
| committer | Alexander Strasser <eclipse7@gmx.net> | 2013-01-04 16:47:57 +0100 |
| commit | ac25b31ede03ef4f89175cb3c293ff6b5609e6c2 (patch) | |
| tree | f6e60c471b2dcee274deecf1b6384bed9d87428e /doc | |
| parent | a08194b4c51ebc7024f50eed0f09aa74058e15bb (diff) | |
| download | ffmpeg-ac25b31ede03ef4f89175cb3c293ff6b5609e6c2.tar.gz | |
lswr: Improve default resampler's default parameters
After making some blind tests on a small collection of music
samples for home usage. It turned out that the default cutoff
was too low.
The impact of filter_size was not clearly distinguishable (the
results were on the edge) with the music samples but turned out
to be clearly audible in some synthetic samples.
Thanks to Daniel for helping out with the listening tests.
Signed-off-by: Alexander Strasser <eclipse7@gmx.net>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/ffmpeg-resampler.texi | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/doc/ffmpeg-resampler.texi b/doc/ffmpeg-resampler.texi index 45e42f9255..92588131b3 100644 --- a/doc/ffmpeg-resampler.texi +++ b/doc/ffmpeg-resampler.texi @@ -121,7 +121,7 @@ case. @end table @item filter_size -For swr only, set resampling filter size, default value is 16. +For swr only, set resampling filter size, default value is 32. @item phase_shift For swr only, set resampling phase shift, default value is 10, must be included @@ -132,7 +132,7 @@ Use Linear Interpolation if set to 1, default value is 0. @item cutoff Set cutoff frequency (swr: 6dB point; soxr: 0dB point) ratio; must be a float -value between 0 and 1. Default value is 0.8 with swr, and 0.91 with soxr +value between 0 and 1. Default value is 0.97 with swr, and 0.91 with soxr (which, with a sample-rate of 44100, preserves the entire audio band to 20kHz). @item precision |