[FFmpeg-user] Increasing audio
Cecil at decebal.nl
Tue Apr 4 00:39:51 EEST 2017
On Monday 3 Apr 2017 21:06 CEST, Paul B. Mahol wrote:
> On 4/3/17, William Caulfield <william.caulfield at contentbridge.tv> wrote:
>> On Sat, Apr 1, 2017 at 1:21 PM, Cecil Westerhof <Cecil at decebal.nl> wrote:
>>> I was asked to make videos during a ToastMasters contest. I had
>>> ordered a microphone for this, but sadly it did not arrive in
>>> time. So I needed to use the internal microphone from my Canon
>>> HS60 SX. Being away about ten meters from the speakers, their
>>> voices are much to soft. So I needed to pump up the audio. I did
>>> this with: ffmpeg -y -i speaker.MP4 -vcodec copy -af volume=3
>>> Is that the correct way, or is there a better way?
>>> Cecil Westerhof
>>> Senior Software Engineer
>>> LinkedIn: http://www.linkedin.com/in/cecilwesterhof
>> Not really an answer to your question, but speaking as an audio
>> The boost you want is around 2.5Khz. That's where vocals are
>> understood. 700hz up to 3.5khz is probably a good range. Avoid
>> boosting below 400hz (muddy) and above 10Khz (zingy).
>> I guess I'm suggesting some sort of EQ before the volume increase.
>> Not sure how that is done in FFMPEG.
I tried several things. For example:
But just volume=3 sounds (mostly) better.
Senior Software Engineer
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