Answers.Body: <p>You have to feed all inputs to the concat filter, and set the correct number of inputs in <code>n</code>. FFmpeg input index starts from 0. So the fifth input has an index of <code>4</code> and would be fed as <code>[4]</code> in the concat filter.</p>
  
  <pre><code>ffmpeg -i body.mp3 
      -framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG 
      -i 1.mp4
      -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
      -i 2.mp4
      -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
      -i 3.mp4
      -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
      -i 4.mp4
      -framerate 60 -loop 1 -t 4.559 -i frames/400100.PNG 
      -i 5.mp4
      -framerate 60 -loop 1 -t 5.351 -i frames/500100.PNG 
      -i 6.mp4
      -framerate 60 -loop 1 -t 4.390 -i frames/600100.PNG 
      -i 7.mp4
      -framerate 60 -loop 1 -t 8.950 -i frames/700100.PNG 
  -filter_complex "[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]concat=n=15:v=1:a=0[v]" 
  -map "[v]" -map 0:a -pix_fmt yuv420p out.mp4
  </code></pre>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-23T11:15:10.273Z
Answers.Text: You probably contradict yourself: `[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]` or `[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14]`?
Answers.UserDisplayName: MarianD
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-23T12:37:01.180Z
Answers.Text: @MarianD the answer is correct. [0] is not to be fed to the concat filter. See OP's last Q.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-23T13:39:31.420Z
Answers.Text: Oh, you're right (as almost always). My inadvertence. :-(
Answers.UserDisplayName: MarianD
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-22T14:12:38.743Z
Answers.LastActivityDate: 2019-08-22T14:12:38.743Z
Answers.UserDisplayName: Gyan
Answers.Body: <p>This is <em>not a new answer</em> — this is only the <em>summary of the Gyan's answer:</em></p>
  
  <ul>
  <li><p>You have 16 inputs (16 times <code>-i</code> options) but you enumerated only 7 of them in <code>[1][2][3][4][5][6][7]</code> (and declared only 7 of them in <code>concat=n=7...,</code>, too):</p>
  
  <blockquote>
  <pre><code>-filter_complex "[1][2][3][4][5][6][7]concat=n=7:v=1:a=0[v]" 
  </code></pre>
  </blockquote>
  
  <p>So you effectively <em>excluded</em> the first input <code>-i body.mp3</code> with index 0 (which you wanted, because you used it as a background music), but <em>another 8 with indices 8 to 15, too (which you don't wanted).</em></p></li>
  </ul>
  
  <hr>
  
  <p>The result is that the accepted inputs for the <code>concat</code> filter are only from your lines</p>
  
  <pre><code>-framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG
  -i 1.mp4 -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
  -i 2.mp4 -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
  -i 3.mp4 -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
  </code></pre>
  
  <p>(7 inputs; the first input <code>-i body.mp3</code>is omitted.)</p>
  
  <p>It is in concordance with the statement in your question. </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-26T18:20:54.103Z
Answers.Text: Thank you for the detailed explanation. Could you also explain what `v=1:a=0[v]` does? I'm trying to add one more `.mp3` as an input. Edit: I'm not looking to overlay the audios.
Answers.UserDisplayName: Testaccount
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-08-23T11:27:18.523Z
Answers.LastActivityDate: 2019-08-23T13:35:25.647Z
Answers.LastEditDate: 2019-08-23T13:35:25.647Z
Answers.UserDisplayName: MarianD
Body: <p>I'm using this to create a video from multiple sources. But, the output has only until <code>frames/300100.PNG</code>. What should I change to make it encode all my inputs?</p>
  
  <pre><code>ffmpeg -i body.mp3 
      -framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG 
      -i 1.mp4 -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
      -i 2.mp4 -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
      -i 3.mp4 -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
      -i 4.mp4 -framerate 60 -loop 1 -t 4.559 -i frames/400100.PNG 
      -i 5.mp4 -framerate 60 -loop 1 -t 5.351 -i frames/500100.PNG 
      -i 6.mp4 -framerate 60 -loop 1 -t 4.390 -i frames/600100.PNG 
      -i 7.mp4 -framerate 60 -loop 1 -t 8.950 -i frames/700100.PNG 
  -filter_complex "[1][2][3][4][5][6][7]concat=n=7:v=1:a=0[v]" 
  -map "[v]" -map 0:a -pix_fmt yuv420p out.mp4
  </code></pre>
  
Tags: <ffmpeg>
Title: ffmpeg script encoding only few inputs
UserDisplayName: Testaccount
ThreadText: # ffmpeg script encoding only few inputs
  
  (Asked by: username_0 on 2019-08-22)
  
  I'm using this to create a video from multiple sources. But, the output has only until `frames/300100.PNG`. What should I change to make it encode all my inputs?
  
  ```
  ffmpeg -i body.mp3 
      -framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG 
      -i 1.mp4 -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
      -i 2.mp4 -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
      -i 3.mp4 -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
      -i 4.mp4 -framerate 60 -loop 1 -t 4.559 -i frames/400100.PNG 
      -i 5.mp4 -framerate 60 -loop 1 -t 5.351 -i frames/500100.PNG 
      -i 6.mp4 -framerate 60 -loop 1 -t 4.390 -i frames/600100.PNG 
      -i 7.mp4 -framerate 60 -loop 1 -t 8.950 -i frames/700100.PNG 
  -filter_complex "[1][2][3][4][5][6][7]concat=n=7:v=1:a=0[v]" 
  -map "[v]" -map 0:a -pix_fmt yuv420p out.mp4
  
  ```
  
  **Tags:** ffmpeg
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_1 on 2019-08-22. Score: 2 | Accepted answer
  
  You have to feed all inputs to the concat filter, and set the correct number of inputs in `n`. FFmpeg input index starts from 0. So the fifth input has an index of `4` and would be fed as `[4]` in the concat filter.
  
  ```
  ffmpeg -i body.mp3 
      -framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG 
      -i 1.mp4
      -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
      -i 2.mp4
      -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
      -i 3.mp4
      -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
      -i 4.mp4
      -framerate 60 -loop 1 -t 4.559 -i frames/400100.PNG 
      -i 5.mp4
      -framerate 60 -loop 1 -t 5.351 -i frames/500100.PNG 
      -i 6.mp4
      -framerate 60 -loop 1 -t 4.390 -i frames/600100.PNG 
      -i 7.mp4
      -framerate 60 -loop 1 -t 8.950 -i frames/700100.PNG 
  -filter_complex "[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]concat=n=15:v=1:a=0[v]" 
  -map "[v]" -map 0:a -pix_fmt yuv420p out.mp4
  
  ```
  
  > **Comments:**
  > **username_2**: You probably contradict yourself: `[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]` or `[0][1][2][3][4][5][6][7][8][9][10][11][12][13][14]`?  
  > **username_1**: @username_2 the answer is correct. [0] is not to be fed to the concat filter. See OP's last Q.  
  > **username_2**: Oh, you're right (as almost always). My inadvertence. :-(  
  
  ---
  
  ### Answer by username_2 on 2019-08-23. Score: 1
  
  This is *not a new answer* — this is only the *summary of the username_1's answer:*
  
  * You have 16 inputs (16 times `-i` options) but you enumerated only 7 of them in `[1][2][3][4][5][6][7]` (and declared only 7 of them in `concat=n=7...,`, too):
  
    > ```
    > -filter_complex "[1][2][3][4][5][6][7]concat=n=7:v=1:a=0[v]" 
    >
    > ```
  
    So you effectively *excluded* the first input `-i body.mp3` with index 0 (which you wanted, because you used it as a background music), but *another 8 with indices 8 to 15, too (which you don't wanted).*
  
  ---
  
  The result is that the accepted inputs for the `concat` filter are only from your lines
  
  ```
  -framerate 60 -loop 1 -t 16.368 -i frames/000000.PNG
  -i 1.mp4 -framerate 60 -loop 1 -t 3.959 -i frames/100100.PNG 
  -i 2.mp4 -framerate 60 -loop 1 -t 6.574 -i frames/200100.PNG 
  -i 3.mp4 -framerate 60 -loop 1 -t 5.134 -i frames/300100.PNG 
  
  ```
  
  (7 inputs; the first input `-i body.mp3`is omitted.)
  
  It is in concordance with the statement in your question.
  
  > **Comments:**
  > **username_0**: Thank you for the detailed explanation. Could you also explain what `v=1:a=0[v]` does? I'm trying to add one more `.mp3` as an input. Edit: I'm not looking to overlay the audios.  
  
  ---
  
  