Answers.Body: <p>You can use <a href="https://ffmpeg.zeranoe.com/builds/" rel="noreferrer">ffmpeg</a>, a free command-line tool, to do this:</p>
  
  <pre><code>ffmpeg -i input.mp4 -vf setpts=8*PTS -r 30 -crf 18 output.mp4
  </code></pre>
  
  <p>This slows down the video 8 times and output is 30 FPS.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-23T00:13:30.960Z
Answers.Text: I am using a gopro 5 video that in file properties indicates:<br/>
  
  duration 3 minutes<br/>
  framerate 120 fps<br/>
  <br/>
  I run the command <br/>
  'ffmpeg -i input.mp4 -vf setpts=4*PTS -r 30 -crf 18 output.mp4'<br/>
  <br/>
  and the new file properties indicates:<br/>
  duration 12 minutes<br/>
  framerate 30 fps<br/>
  <br/>
  The problem was that I imported the new video in a Kdenlive new proyect, and skiping frame by frame with the arrow I see 3 continuous identical frame then change the image that repeats again and change every 3 or 4 frames.
Answers.UserDisplayName: AutoCiudad
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-04-23T04:41:48.613Z
Answers.Text: Upload the readout of `ffprobe goprofile` to pastebin or similar and share a link.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-09-05T11:03:28.007Z
Answers.LastActivityDate: 2016-09-05T11:03:28.007Z
Answers.UserDisplayName: Gyan
Body: <p>I recorded a "slow-motion" video with my Android phone and transferred it to my Windows computer. Now I have an MP4 file with a frame-rate of 240 fps. But when I play the video, it plays at normal speed.  I want to create a video that I can upload to YouTube or Facebook that plays at 1/8 speed (30 fps).</p>
  
  <p>I thought I could do that with the free Movie Maker that comes with Windows. But when I select 1/8 speed it comes out chunky. It looks like the software converted the video to 30 fps when it loaded, and is now playing back that 30 fps video at 1/8 speed.  I'm guessing that Movie Maker can't do what I want.</p>
  
  <p>How do I create a video so that when someone plays that video they see it in slow-motion?</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-09-05T11:40:52.553Z
Comments.Text: If your Movie Maker software converted the 240fps video to 30fps when it loads it into a project, then you have exactly what you want.  You then only need render it out at 30 fps and you have a slow-motion video.  Of course the ffmpeg answer is also valid, but you may wish to make other adjustments, some of which are easy to do with ffmpeg (cropping, scaling, etc), others which benefit from having an interactive GUI (color correcting, etc).
Comments.UserDisplayName: Michael Tiemann
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-09-05T12:26:35.157Z
Comments.Text: Sorry, Michael, I wasn't clear.  When I say Movie Maker converted the video to 30 fps, I mean that it threw away the other 210 frames, resulting in a real-time 30 fps video.
Comments.UserDisplayName: David Dubois
Tags: <windows><slowmotion>
Title: Convert high frame video to slow motion video
UserDisplayName: David Dubois
ThreadText: # Convert high frame video to slow motion video
  
  (Asked by: username_0 on 2016-09-05)
  
  I recorded a "slow-motion" video with my Android phone and transferred it to my Windows computer. Now I have an MP4 file with a frame-rate of 240 fps. But when I play the video, it plays at normal speed. I want to create a video that I can upload to YouTube or Facebook that plays at 1/8 speed (30 fps).
  
  I thought I could do that with the free Movie Maker that comes with Windows. But when I select 1/8 speed it comes out chunky. It looks like the software converted the video to 30 fps when it loaded, and is now playing back that 30 fps video at 1/8 speed. I'm guessing that Movie Maker can't do what I want.
  
  How do I create a video so that when someone plays that video they see it in slow-motion?
  
  **Tags:** windows, slowmotion
  
  > **Comments:**
  > **username_1**: If your Movie Maker software converted the 240fps video to 30fps when it loads it into a project, then you have exactly what you want.  You then only need render it out at 30 fps and you have a slow-motion video.  Of course the ffmpeg answer is also valid, but you may wish to make other adjustments, some of which are easy to do with ffmpeg (cropping, scaling, etc), others which benefit from having an interactive GUI (color correcting, etc).  
  > **username_0**: Sorry, username_1, I wasn't clear.  When I say Movie Maker converted the video to 30 fps, I mean that it threw away the other 210 frames, resulting in a real-time 30 fps video.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2016-09-05. Score: 10 | Accepted answer
  
  You can use [ffmpeg](https://ffmpeg.zeranoe.com/builds/), a free command-line tool, to do this:
  
  ```
  ffmpeg -i input.mp4 -vf setpts=8*PTS -r 30 -crf 18 output.mp4
  
  ```
  
  This slows down the video 8 times and output is 30 FPS.
  
  > **Comments:**
  > **username_3**: I am using a gopro 5 video that in file properties indicates:<br/>  duration 3 minutes<br/> framerate 120 fps<br/> <br/> I run the command <br/> 'ffmpeg -i input.mp4 -vf setpts=4*PTS -r 30 -crf 18 output.mp4'<br/> <br/> and the new file properties indicates:<br/> duration 12 minutes<br/> framerate 30 fps<br/> <br/> The problem was that I imported the new video in a Kdenlive new proyect, and skiping frame by frame with the arrow I see 3 continuous identical frame then change the image that repeats again and change every 3 or 4 frames.  
  > **username_2**: Upload the readout of `ffprobe goprofile` to pastebin or similar and share a link.  
  
  ---
  
  