Answers.Body: <p>To force to 44100 Hz, command template is</p>
  
  <pre><code>ffmpeg -i old.mp4 -map 0 -c:v copy -c:a aac -ar 44100 new.mp4
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-07-11T12:57:03.950Z
Answers.Text: Is there a way to force the merge?
Answers.UserDisplayName: masterq
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-07-11T13:17:56.707Z
Answers.Text: Using mkvmerge, don't see a way. Playback speed would be wrong for 2nd file even if you could.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-07-11T12:52:27.167Z
Answers.LastActivityDate: 2018-07-11T12:52:27.167Z
Answers.UserDisplayName: Gyan
Body: <p>I'm trying to merge a few video files through <code>mkvmerge</code> but I get the following error after running</p>
  
  <pre><code>mkvmerge -o '/home/videos/marged/new.mp4' '/home/videos/intro.mp4' \+ 'old.mp4' \+ '/home/videos/intro.mp4'
  </code></pre>
  
  <p>Error:</p>
  
  <pre><code>Error: The track number 1 from the file 'old.mp4' cannot be appended to the track number 1 from the file '/home/videos/intro.mp4'. The sample rate of the two audio tracks is different: 44100 and 22050
  </code></pre>
  
  <p>Is there a way to force this? If not how can I change the audio to the same rate as <code>old.mp4</code> in ffmpeg for <code>/home/videos/intro.mp4</code></p>
  
Tags: <ffmpeg><bitrate>
Title: "The sample rate of the two audio tracks is different"
UserDisplayName: masterq
ThreadText: # "The sample rate of the two audio tracks is different"
  
  (Asked by: username_0 on 2018-07-11)
  
  I'm trying to merge a few video files through `mkvmerge` but I get the following error after running
  
  ```
  mkvmerge -o '/home/videos/marged/new.mp4' '/home/videos/intro.mp4' \+ 'old.mp4' \+ '/home/videos/intro.mp4'
  
  ```
  
  Error:
  
  ```
  Error: The track number 1 from the file 'old.mp4' cannot be appended to the track number 1 from the file '/home/videos/intro.mp4'. The sample rate of the two audio tracks is different: 44100 and 22050
  
  ```
  
  Is there a way to force this? If not how can I change the audio to the same rate as `old.mp4` in ffmpeg for `/home/videos/intro.mp4`
  
  **Tags:** ffmpeg, bitrate
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2018-07-11. Score: 2
  
  To force to 44100 Hz, command template is
  
  ```
  ffmpeg -i old.mp4 -map 0 -c:v copy -c:a aac -ar 44100 new.mp4
  
  ```
  
  > **Comments:**
  > **username_0**: Is there a way to force the merge?  
  > **username_1**: Using mkvmerge, don't see a way. Playback speed would be wrong for 2nd file even if you could.  
  
  ---
  
  