[FFmpeg-user] How to delete digital silence?

Ilir Pruthi ipruthi at gmail.com
Sat Sep 13 10:46:04 CEST 2014


On Sat, Sep 13, 2014 at 4:05 AM, Paul B Mahol <onemda at gmail.com> wrote:

> On 9/11/14, Bart Gopnik <bart.gopnik at gmail.com> wrote:
> >>> Now I'm using proprietary software to delete
> >>> digital silence from the beginning and from the
> >>> end of *.wav file.
> >
> >>> Can I solve this problem using FFMPEG (only)?
> >
> >
> >> Did you already test the silencedetect and
> >> silenceremove filter?
> >> https://ffmpeg.org/ffmpeg-filters.html#silencedetect
> >
> >
> > No, looks like it is new filters.
> >
> > Should I combine these 2 filters (silencedetect and silenceremove) or
> > I can solve my problem using only "silenceremove" filter? I need
> > delete absolute (not noise) digital silence only from beginning and
> > from the end of audio file (not from middle).
> >
> > Could you please help me to create command line to do this?
> >
>
> ffmpeg -i INPUT -af silenceremove=1:0.1:0:1:0.1:0  OUTPUT
>

After running:
ffmpeg -i "udp://@MY_IP:XXX?overrun_nonfatal=1&reuse=1" -map 0:p:11 -af
silenceremove=1:0.1:0:1:0.1:0 -vcodec libx264 -acodec libmp3 -t 30 -f
mpegts -y program11.ts

I get:
[AVFilterGraph @ 0x2b9e360] No such filter: 'silenceremove'

My FFmpeg version is:
ffmpeg version 2.2.git Copyright (c) 2000-2014 the FFmpeg developers
  built on May 11 2014 06:03:44 with gcc 4.7 (Debian 4.7.2-5)
  configuration: --prefix=/home/encuser/ffmpeg_build
--extra-cflags=-I/home/encuser/ffmpeg_build/include
--extra-ldflags=-L/home/encuser/ffmpeg_build/lib --bindir=/home/encuser/bin
--extra-libs=-ldl --enable-gpl --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264
--enable-nonfree

Thanks,

-Ilir



> > Thanks in advance for your help!
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> > ffmpeg-user at ffmpeg.org
> > http://ffmpeg.org/mailman/listinfo/ffmpeg-user
> >
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