<p>The setup that i use for something similar is:</p>

<p><strong>Step 1</strong> - demux</p>

<pre><code>avconv -i in.mts -an -c:a copy video.mkv -c:a copy audio.ac3
</code></pre>

<p><strong>Step 2</strong> - audio editing</p>

<p>For this i just open my audio.ac3 in Audacity and normalise the sound. At this time it may be a good idea to try to remove the noise. I reencode into Vorbis, but it is up to you what you wish to do. Let's say you save into audio.oga</p>

<p><strong>Step 3</strong> - mux</p>

<pre><code>avconv -i video.mkv -i audio.oga -c:v copy -c:a copy out.mkv
</code></pre>

<p><strong>Notes</strong></p>

<ol>
<li>Video was getting copied all the time. So no quality loss is possible from that.</li>
<li>You can drop the video demuxing, and just grab it directly from the original in the third step. But i find it just makes the process much cleaner when you know where everything is.</li>
</ol>

CC BY-SA 3.0
2014-07-17T16:11:34.163Z
2014-07-17T16:11:34.163Z
v010dya
<p>I need just increase sound of my MTS video. But I'm very afraid to lose the quality of video because it is classical music and intonation is very important.</p>

CC BY-SA 3.0
2014-07-08T06:24:44.560Z
Is it sound that you can pull from another source, simply gaining up the sound will likely have noise floor problems if it is too low.  You can demux the audio from the video and then boost and re-encode only the audio.
AJ Henderson
<audio>
What is the best tool to increase sound of MTS video without need to re-encoding this video?
Light Harut
# What is the best tool to increase sound of MTS video without need to re-encoding this video?

(Asked by: username_0 on 2014-07-08)

I need just increase sound of my MTS video. But I'm very afraid to lose the quality of video because it is classical music and intonation is very important.

**Tags:** audio

> **Comments:**
> **username_1**: Is it sound that you can pull from another source, simply gaining up the sound will likely have noise floor problems if it is too low.  You can demux the audio from the video and then boost and re-encode only the audio.  

---

## 1 answers

### Answer by username_2 on 2014-07-17. Score: 1

The setup that i use for something similar is:
Step 1 - demux
avconv -i in.mts -an -c:a copy video.mkv -c:a copy audio.ac3

Step 2 - audio editing
For this i just open my audio.ac3 in Audacity and normalise the sound. At this time it may be a good idea to try to remove the noise. I reencode into Vorbis, but it is up to you what you wish to do. Let's say you save into audio.oga
Step 3 - mux
avconv -i video.mkv -i audio.oga -c:v copy -c:a copy out.mkv

Notes

Video was getting copied all the time. So no quality loss is possible from that.
You can drop the video demuxing, and just grab it directly from the original in the third step. But i find it just makes the process much cleaner when you know where everything is.


---

