Body: <p>We have been asked by a client to create a ProRes QT file (.mov) but specifically asked to "<strong><em>The moov atom (movie index file) should be placed at the beginning of the file.</em></strong>" I have been reading around but could not find a solution for .mov files. Everybody is talking for .mp4.
  The line I came with is:</p>
  
  <pre><code>ffmpeg.exe -i input.mov -c copy -map 0:v:0 -map 0:a:6 -map 0:a:7 -movflags faststart output_ATOM.mov
  </code></pre>
  
  <p>The audio mapping and the video copying is working fine. I need to know if the <strong><em>-movflags faststart</em></strong> is actually going to do the job? I can't find a way to check the result if it actually moved the Atom.</p>
  
  <p>Thanks!</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-16T06:15:33.453Z
Comments.Text: .mp4 and .mov are pretty much synonymous. Moving the moov atom to the start fo the file is what faststart does, so it whould work. I don't exactly know how you'd check it, other than trying to play the movie over a slow internet connection.
Comments.UserDisplayName: stib
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2020-04-16T08:11:53.813Z
Comments.Text: Thanks for confirming stib! I actually found a way. open the file with a HEX editor and if it's correct, the moov should be at the start. Thanks!
Comments.UserDisplayName: Yannis
Tags: <video><ffmpeg>
Title: ffmpeg MOOV Atom on a ProRes file?
UserDisplayName: Yannis
ThreadText: # ffmpeg MOOV Atom on a ProRes file?
  
  (Asked by: username_0 on 2020-04-15)
  
  We have been asked by a client to create a ProRes QT file (.mov) but specifically asked to "***The moov atom (movie index file) should be placed at the beginning of the file.***" I have been reading around but could not find a solution for .mov files. Everybody is talking for .mp4.
  The line I came with is:
  
  ```
  ffmpeg.exe -i input.mov -c copy -map 0:v:0 -map 0:a:6 -map 0:a:7 -movflags faststart output_ATOM.mov
  
  ```
  
  The audio mapping and the video copying is working fine. I need to know if the ***-movflags faststart*** is actually going to do the job? I can't find a way to check the result if it actually moved the Atom.
  
  Thanks!
  
  **Tags:** video, ffmpeg
  
  > **Comments:**
  > **username_1**: .mp4 and .mov are pretty much synonymous. Moving the moov atom to the start fo the file is what faststart does, so it whould work. I don't exactly know how you'd check it, other than trying to play the movie over a slow internet connection.  
  > **username_0**: Thanks for confirming username_1! I actually found a way. open the file with a HEX editor and if it's correct, the moov should be at the start. Thanks!  
  
  ---
  
  ## 0 answers
  
  