On 2/19/20, To ny <[email protected]> wrote: > Hello, and thanks so much for your reply. > > I was actually only requesting help for the silenceremove arguments (or > settings or > however they're called) on the commandline. > > The -20 dB threshold will not be my final settings. It was just to make sure > something is removed. > > I don't know if you only read my additions to the original question (be > replying > to my first original email) or did read my original mail. I tried a few > variations > of the silenceremove filter arguments but with unexpected results.
Silenceremove results are correct and your file(s) are broken. > > Kind regards, > > Tony > > ________________________________ > Van: ffmpeg-user <[email protected]> namens Ted Park > <[email protected]> > Verzonden: woensdag 19 februari 2020 10:11 > Aan: FFmpeg user questions <[email protected]> > Onderwerp: Re: [FFmpeg-user] silenceremove use > >> Is there anyone who has experience with the silenceremove filter? I'm >> trying to remove long silences from recordings i made on my phone. The >> silences are actually a constant noise because of the microphone gain is >> set to 5.0x. (The playback meter in Audacity says the noise is around -48 >> to 42 dB). It is around 9 hours in duration. 1,1 GB large, signed 16 bit >> little endian mono 16 kHz wave file. Audacity says it's 32 bit float wave >> file though. > > Hey there, > As you’ve noticed you pretty much need to know the basic “profile,” I guess, > of the silence in your audio for best results. You could use the show volume > filter with ffplay, > % ffplay -f lavfi -i “amovie=$INPUT,showvolume" > To get a general idea of what the noise is like, and apply the options > accordingly. > e.g. Use the levels of the silence/noise sections for the level options, > setting -20db would cut out a lot more than noise, I think; see if there are > short periods of noise, other than background noise, but still noise, and > see how long those are to set a value for the duration options; also see if > using peak and a window of 10 seconds makes sense (It might not, even if you > set a more sensible value for the threshold, basically I think that would > make it treat anything as silence if in a 10 second window it rises above > the threshold even once) > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
