[FFmpeg-user] Silence Removal

[Paul B Mahol]

On 6/27/15, sk8f <teju_kurnool-at-yahoo.com at ffmpeg.org> wrote:
> I have an audio file which has the following specifications.
> Codec: MPEG AAC Audio (mp4a)
> Channels: Stereo
> Sample rate: 44100 Hz
> Bitrate: 253 kbps
>
> It has both leading and trailing silence.
> I want to remove the silences AND keep the quality intact.
>
> So far I've tried
> ffmpeg -i 1.m4a -af silenceremove=1:0.5:0:1:0.5:0 2.m4a
> This is supposed to remove both the leading and trailing silences.
> But for some reason it doesn't remove the trailing silence.
> There is a similar thread on this mailing list that has the same problem.
> Also, it reduces the bitrate to 128kbps. This I could fix by adding the -ab
> 253k and making the command:
> ffmpeg -i 1.m4a -af silenceremove=1:0.5:0:1:0.5:0 *-ab 253k* 3.m4a
> Now the problem is that the trailing silence isn't removed and when I want
> to process a batch of files I can't use the same bitrate (like 253kbps )
> for
> every file.
>
> Any help will be appreciated.
> Thanks.

Perhaps you could use silencedetect and then trim audio you do not
need while keeping
same quality.

>
>
>
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