On Sat, Apr 1, 2017 at 1:21 PM, Cecil Westerhof <ce...@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 speakerAudioInc.MP4 > > 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 engineer: 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. -- *William Caulfield *| *ContentBridge Systems* Product Manager, Digital Media & Systems | www.contentbridge.tv _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
