[FFmpeg-devel] [PATCH] avfilter/af_tremolo: fix envelope phase

[Paul B Mahol]

On 9/22/15, Kyle Swanson <k at ylo.ph> wrote:
> Signed-off-by: Kyle Swanson <k at ylo.ph>
> ---
>  libavfilter/af_tremolo.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavfilter/af_tremolo.c b/libavfilter/af_tremolo.c
> index 6335401..69eaa34 100644
> --- a/libavfilter/af_tremolo.c
> +++ b/libavfilter/af_tremolo.c
> @@ -138,7 +138,7 @@ static int config_input(AVFilterLink *inlink)
>      if (!s->wave_table)
>          return AVERROR(ENOMEM);
>
> -    ff_generate_wave_table(WAVE_SIN, AV_SAMPLE_FMT_DBL, s->wave_table,
> s->sample_rate / s->freq, 0.0, 1.0, 0.0);
> +    ff_generate_wave_table(WAVE_SIN, AV_SAMPLE_FMT_DBL, s->wave_table,
> s->sample_rate / s->freq, 0.0, 1.0, 3.0 * M_PI / 2.0);
>      s->wave_table_index = 0;
>      return 0;
>  }
> --
> 1.8.4
>

Why? This worsen psnr between sox and us.