theora - Sep 2010 - normalization of audio when using ffmpeg2theora?

Hello,

We created some amateurish videos during Software Freedom Day. I like to publish
them, but some are too quiet. How I can normalize the audio, when using
ffmpeg2theora? Are you using some scripts to split audio and video and combine
them back or what is the "automated way", how to achieve that?
Enhancement of video will be useful too, but audio is critical.

Thank you,
Jiri

--
Jiri Navratil, http://www.navratil.cz,  +420 777 224 245

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> We created some amateurish videos during Software Freedom Day. I like to
> publish them, but some are too quiet. How I can normalize the audio,
> when using ffmpeg2theora? Are you using some scripts to split audio and
> video and combine them back or what is the "automated way", how
to
> achieve that? Enhancement of video will be useful too, but audio is
> critical.
Hi,
you have to split audio into an extra file, with that you could use
normalize-audio to adjust sound, something like this:

ffmpeg -i $input $input.wav
normalize-audio $input.wav
ffmpeg -i $input -i $input.wav -map 0.0:0.0 \
                               -map 1.0:0.1 \
       -vcodec copy -acodec copy \
       $input.normalized-audio.mkv
ffmpeg2theora $input.normalize-audio.mkv

ffmpeg2theora itself does not have any audio postprocessing, there are
some options for video check --pp help

j

Hi,

Thank you for quick and helpful response.

Regarding video checks, I will try --pp autolevels  (as only option I understand
the indention :)

Thx again,
Jiri

--
Jiri Navratil, http://www.navratil.cz,  +420 777 224 245

On 19.9.2010, at 22:33, j at v2v.cc wrote:
> Hi,
> you have to split audio into an extra file, with that you could use
> normalize-audio to adjust sound, something like this:
> 
> ffmpeg -i $input $input.wav
> normalize-audio $input.wav
> ffmpeg -i $input -i $input.wav -map 0.0:0.0 \
>                               -map 1.0:0.1 \
>       -vcodec copy -acodec copy \
>       $input.normalized-audio.mkv
> ffmpeg2theora $input.normalize-audio.mkv
> 
> ffmpeg2theora itself does not have any audio postprocessing, there are
> some options for video check --pp help
> 
> j
> _______________________________