Hello, tried but doesn't work correctly:-(
$shell = shell_exec("$ffmpeg_b -i $audio_file_full_path -map 0:a:0 -af
highpass=700,loudnorm=I=-24 -map_metadata -1 -metadata Artist=Someone
-metadata Title=Title -metadata author_url=http://example.com/ -b:a
".$convert_speed."k $audio_output_mp3 2>&1");
Tried with 700 hz
the result is very low in volume
it seems that it normalize to -24 and after apply the highpass
another point I can't fix is the metadata, they works except for the
author:url.
Maybe am I wrong with syntax?
Thanks in advance.
Il giorno gio 1 ott 2020 alle ore 15:40 Marco Mircoli <nuvolab...@gmail.com>
ha scritto:
> Thanks a lot!
>
> Il giorno gio 1 ott 2020 alle ore 14:17 Michael Koch <
> astroelectro...@t-online.de> ha scritto:
>
>> Am 01.10.2020 um 14:06 schrieb Michael Koch:
>> > Am 01.10.2020 um 13:25 schrieb Marco Mircoli:
>> >> Hello',
>> >> I'm a newbie.
>> >> Just bought a php script that use ffmpeg.
>> >> it converts to mp3/96Kbps all media uploaded in a unique format.
>> >> this is the line, and now it normalizes to R128 (thanks Moritz)
>> >>
>> >> $shell = shell_exec("$ffmpeg_b -i $audio_file_full_path -map
>> >> 0:a:0 -af
>> >> loudnorm -b:a 96k $audio_output_mp3 2>&1");
>> >>
>> >> I'm wondering if it is possible to include a simple hi-pass filter
>> >> (highest
>> >> db per octave @ 70Hz)
>> >
>> > add highpass=70, before loudnorm
>> >
>> > This filter attenuated 6dB per octave. If you need higher attenuation,
>> > you can use several highpass filters, for example
>> > highpass=70,highpass=70,highpass=70,loudnorm
>>
>> Correction: The filter has 12dB per octave.
>>
>> Michael
>>
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