Answers.Body: <p>An example of adding <a href="https://ffmpeg.org/ffmpeg-filters.html#toc-dilation" rel="nofollow noreferrer">dilation</a> might look like:</p>
  <pre><code>ffmpeg -i example_in.mp3 -filter_complex \
  &quot;[0:a]showwaves=mode=p2p:s=1280x480:colors=Magenta|Azure|White:r=25; \
   [v]dilation=threshold3=10[v]&quot; \
  -map &quot;[v]&quot; -map 0:a -pix_fmt yuv420p \
  -b:a 360k -r:a 44100  example_out.mp4
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-05-09T18:38:44.117Z
Answers.LastActivityDate: 2021-05-09T18:38:44.117Z
Answers.UserDisplayName: MikeiLL
Body: <p>I've been actively playing around with ffmpeg for the past few days, and now I want to make an audio visualiser, just with the <code>showwaves</code> filter (I made it white using p2p mode, and I don't want to use a mode that would just fill the wave with white).</p>
  
  <p>The problem with the showwaves filter is that it creates a very thin 1px line which makes it pretty hard to see when it varies really fast. At a low video bitrate it becomes almost invisible.</p>
  
  <p>So I tried several ways to make this thin white line look thicker, including geq to increase alpha values, gblur+increasing contrast. For now I got the most "satisfying" results by making the size of the showwaves 10x smaller and then using scale to make it the size I want. But the result is very pixelated so that's not really suitable. I've also thought of duplicating the wave a lot and displacing the copies around but I don't think it would be very performance-friendly. </p>
  
  <p>So I was wondering whether there is anyway of adding some outline/glow/shadow/anything that would make this line look a bit thicker (like 5px would be enough), or anything else than showwaves that would somehow achieve what I'm looking for.</p>
  
  <p>Thanks</p>
  
Tags: <ffmpeg><filter>
Title: ffmpeg - Make a white line look thicker
UserDisplayName: Cyxo
ThreadText: # ffmpeg - Make a white line look thicker
  
  (Asked by: username_0 on 2019-08-24)
  
  I've been actively playing around with ffmpeg for the past few days, and now I want to make an audio visualiser, just with the `showwaves` filter (I made it white using p2p mode, and I don't want to use a mode that would just fill the wave with white).
  
  The problem with the showwaves filter is that it creates a very thin 1px line which makes it pretty hard to see when it varies really fast. At a low video bitrate it becomes almost invisible.
  
  So I tried several ways to make this thin white line look thicker, including geq to increase alpha values, gblur+increasing contrast. For now I got the most "satisfying" results by making the size of the showwaves 10x smaller and then using scale to make it the size I want. But the result is very pixelated so that's not really suitable. I've also thought of duplicating the wave a lot and displacing the copies around but I don't think it would be very performance-friendly.
  
  So I was wondering whether there is anyway of adding some outline/glow/shadow/anything that would make this line look a bit thicker (like 5px would be enough), or anything else than showwaves that would somehow achieve what I'm looking for.
  
  Thanks
  
  **Tags:** ffmpeg, filter
  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_1 on 2021-05-09. Score: 1
  
  An example of adding [dilation](https://ffmpeg.org/ffmpeg-filters.html#toc-dilation) might look like:
  
  ```
  ffmpeg -i example_in.mp3 -filter_complex \
  "[0:a]showwaves=mode=p2p:s=1280x480:colors=Magenta|Azure|White:r=25; \
   [v]dilation=threshold3=10[v]" \
  -map "[v]" -map 0:a -pix_fmt yuv420p \
  -b:a 360k -r:a 44100  example_out.mp4
  
  ```
  
  
  ---
  
  