<p>I am trying to convert a DTS stream to AAC(stereo) using the following command:</p>
<pre><code>ffmpeg -i &quot;input.mkv&quot;  
-c:v copy  
-c:a aac -q:a 2 -ac 2 -ar 48000  
  &quot;output.mp4&quot;
</code></pre>
<p>[ffmpeg version : 3.4.8]</p>
<p>Here q:a 2 controls the output bitrate or quality of the audio stream (VBR). In FFmpeg docs its effective range is given as 0.1-2 where 2 is the best quality. But I have tried increasing this number up to 5 or 6 and the bitrate of output stream keeps increasing.</p>
<p>So I want to know the best possible way to convert the DTS   stream to AAC stream with the highest quality. For example, is there a number <strong>n</strong>  such that q:<strong>n</strong> will set the highest quality conversion?</p>
<p>Thanks.</p>

CC BY-SA 4.0
2021-03-07T04:44:40.823Z
The native AAC encoder goes upto ~260 kbps. Set it usising bitrate.
Gyan
CC BY-SA 4.0
2021-03-07T05:53:29.713Z
Thanks @Gyan  I will try it using bitrate.
Lalit Kumar
<ffmpeg><encoding><audio-quality>
Quality control in DTS to AAC(stereo) conversion using ffmpeg
Lalit Kumar
# Quality control in DTS to AAC(stereo) conversion using ffmpeg

(Asked by: username_0 on 2021-03-06)

I am trying to convert a DTS stream to AAC(stereo) using the following command:
ffmpeg -i "input.mkv"  
-c:v copy  
-c:a aac -q:a 2 -ac 2 -ar 48000  
  "output.mp4"

[ffmpeg version : 3.4.8]
Here q:a 2 controls the output bitrate or quality of the audio stream (VBR). In FFmpeg docs its effective range is given as 0.1-2 where 2 is the best quality. But I have tried increasing this number up to 5 or 6 and the bitrate of output stream keeps increasing.
So I want to know the best possible way to convert the DTS   stream to AAC stream with the highest quality. For example, is there a number n  such that q:n will set the highest quality conversion?
Thanks.

**Tags:** ffmpeg, encoding, audio-quality

> **Comments:**
> **username_1**: The native AAC encoder goes upto ~260 kbps. Set it usising bitrate.  
> **username_0**: Thanks @username_1  I will try it using bitrate.  

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## 0 answers

