diff options
| author | Muhammad Faiz <mfcc64@gmail.com> | 2016-06-12 05:19:20 +0700 |
|---|---|---|
| committer | Muhammad Faiz <mfcc64@gmail.com> | 2016-06-13 12:36:01 +0700 |
| commit | b8c6e5a6618337a82ea9d0bafb471eeecc51b919 (patch) | |
| tree | 2e3f169f004747e59cde3043312446deec719711 /libswresample/options.c | |
| parent | 5ca44ebd99937b0038c25784570fa80d158b21fb (diff) | |
swresample: add exact_rational option
give high quality resampling
as good as with linear_interp=on
as fast as without linear_interp=on
tested visually with ffplay
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000, showcqt=gamma=5"
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000:linear_interp=on, showcqt=gamma=5"
ffplay -f lavfi "aevalsrc='sin(10000*t*t)', aresample=osr=48000:exact_rational=on, showcqt=gamma=5"
slightly speed improvement
for fair comparison with -cpuflags 0
audio.wav is ~ 1 hour 44100 stereo 16bit wav file
ffmpeg -i audio.wav -af aresample=osr=48000 -f null -
old new
real 13.498s 13.121s
user 13.364s 12.987s
sys 0.131s 0.129s
linear_interp=on
old new
real 23.035s 23.050s
user 22.907s 22.917s
sys 0.119s 0.125s
exact_rational=on
real 12.418s
user 12.298s
sys 0.114s
possibility to decrease memory usage if soft compensation is ignored
Signed-off-by: Muhammad Faiz <mfcc64@gmail.com>
Diffstat (limited to 'libswresample/options.c')
| -rw-r--r-- | libswresample/options.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libswresample/options.c b/libswresample/options.c index eac1a7c91f..816ce47750 100644 --- a/libswresample/options.c +++ b/libswresample/options.c @@ -85,6 +85,7 @@ static const AVOption options[]={ {"filter_size" , "set swr resampling filter size", OFFSET(filter_size) , AV_OPT_TYPE_INT , {.i64=32 }, 0 , INT_MAX , PARAM }, {"phase_shift" , "set swr resampling phase shift", OFFSET(phase_shift) , AV_OPT_TYPE_INT , {.i64=10 }, 0 , 24 , PARAM }, {"linear_interp" , "enable linear interpolation" , OFFSET(linear_interp) , AV_OPT_TYPE_BOOL , {.i64=0 }, 0 , 1 , PARAM }, +{"exact_rational" , "enable exact rational" , OFFSET(exact_rational) , AV_OPT_TYPE_BOOL , {.i64=0 }, 0 , 1 , PARAM }, {"cutoff" , "set cutoff frequency ratio" , OFFSET(cutoff) , AV_OPT_TYPE_DOUBLE,{.dbl=0. }, 0 , 1 , PARAM }, /* duplicate option in order to work with avconv */ |