Answers.Body: <p>Using FFmpeg's command-line, this is totally possible. I do it to increase the speed of my videos by 10% (increasing both the audio AND video by 10%, without sounding like a chipmunk).</p>
  
  <p>The command to increase your video's speed by 10% is:</p>
  
  <pre><code>&lt;ffmpeg path&gt; -i &lt;origin video path&gt; -vf "setpts=(PTS-STARTPTS)/1.1" -crf 18 -af atempo=1.1 &lt;output video path&gt;
  </code></pre>
  
  <p>Here's the exact command line that I use:</p>
  
  <pre><code>"C:\Program Files\ffmpeg-win64\bin\ffmpeg.exe" -i "G:\minecraft lets play.mp4" -vf "setpts=(PTS-STARTPTS)/1.1" -crf 18 -af atempo=1.1 "G:\minecraft lets play ffmpeg.mp4"
  </code></pre>
  
  <p>If you want to increase your video's speed by more, or less, then you just change the "1.1" at both lines to something else. "1.1" is 10%. "1.5" is 50%. "3" is 300%. "10" is 1000%.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2022-10-25T01:47:10.083Z
Answers.Text: great answer! as you mention audio, cheers!
Answers.UserDisplayName: manuelBetancurt
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-05-21T14:48:58.223Z
Answers.LastActivityDate: 2020-05-24T07:15:53.640Z
Answers.LastEditDate: 2020-05-24T07:15:53.640Z
Answers.UserDisplayName: LFPGaming
Answers.Body: <p>You can use <a href="https://ffmpeg.org/download.html">ffmpeg</a>, a free command-line tool, to do this.</p>
  
  <p>The basic command is</p>
  
  <pre><code>ffmpeg -i input.mov -vf "setpts=(PTS-STARTPTS)/30" -crf 18 output.mov
  </code></pre>
  
  <p>The <code>30</code> indicates the factor by which the video will be sped up.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-05-21T09:32:25.743Z
Answers.Text: Thanks a lot. This helps mutch. Is there propably also a way to revirse a video with ffmpeg ?
Answers.UserDisplayName: user1344545
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-05-21T09:46:51.020Z
Answers.Text: Sure. but it loads the whole file into memory, so I suggest applying it after speed change, like this: `-vf "setpts=(PTS-STARTPTS)/30,reverse"`
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-08-10T14:57:23.223Z
Answers.Text: Note, this seems to add a bunch of empty blackness at the end. Or, rather, it condenses the video but keeps the original length and just fills it with solid black.
Answers.UserDisplayName: Joshua Pinter
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-08-10T15:10:28.257Z
Answers.Text: If you have an audio track in the input which isn't correspondingly sped up, yes, but not otherwise. Add `-an` to disable or `-af atempo=2,atempo=2,atempo=2,atempo=2,atempo=1.875` to speed up the audio as well.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-08-10T15:20:26.337Z
Answers.Text: If you do keep audio (without speed up), whether it's black depends on the player's behaviour. In Potplayer, the last frame is frozen.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-08-12T18:00:38.343Z
Answers.Text: @Mulvya What's the relation between video speed up factor of 30 and audio tempo speed up of 1.875? Basically I just want to speed up a video 4 times, what should be the arguments for audio speed up in that case?
Answers.UserDisplayName: laggingreflex
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-08-12T18:10:51.020Z
Answers.Text: Audio is sped up using the atempo filter, which only takes values in the range of [0.5-2]. So to make a speed change outside that range, multiple atempo filters have to be daisychained. I have four filters with value of 2 and 1 of 1.875 since `2*2*2*2*1.875=30`. For four times, you need `atempo=2,atempo=2`
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-08-25T13:24:00.467Z
Answers.Text: What is crf 18?
Answers.UserDisplayName: stephanmg
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-08-25T15:27:32.290Z
Answers.Text: Constant rate factor - in practice, a measure of the quality/size tradeoff used by the default video encoder (x264) for MP4 and MOVs. Lower is better but bigger. 18 is good; 23 is default.
Answers.UserDisplayName: Gyan
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-05-21T07:47:14.220Z
Answers.LastActivityDate: 2016-05-21T07:47:14.220Z
Answers.UserDisplayName: Gyan
Body: <p>Is it possible to speed up a video using handbrake ?</p>
  
  <p>I am looking for a software like handbrake to convert videos for faster playback. It should speed up the video up to 30x.</p>
  
  <p>Is it possible with handbrake or are there similar tools ?</p>
  
Tags: <video><ffmpeg><playback>
Title: Is it possible to speed up a video using handbrake?
UserDisplayName: user1344545
ThreadText: # Is it possible to speed up a video using handbrake?
  
  (Asked by: username_0 on 2016-05-21)
  
  Is it possible to speed up a video using handbrake ?
  
  I am looking for a software like handbrake to convert videos for faster playback. It should speed up the video up to 30x.
  
  Is it possible with handbrake or are there similar tools ?
  
  **Tags:** video, ffmpeg, playback
  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_3 on 2016-05-21. Score: 25 | Accepted answer
  
  You can use [ffmpeg](https://ffmpeg.org/download.html), a free command-line tool, to do this.
  
  The basic command is
  
  ```
  ffmpeg -i input.mov -vf "setpts=(PTS-STARTPTS)/30" -crf 18 output.mov
  
  ```
  
  The `30` indicates the factor by which the video will be sped up.
  
  > **Comments:**
  > **username_0**: Thanks a lot. This helps mutch. Is there propably also a way to revirse a video with ffmpeg ?  
  > **username_3**: Sure. but it loads the whole file into memory, so I suggest applying it after speed change, like this: `-vf "setpts=(PTS-STARTPTS)/30,reverse"`  
  > **username_4**: Note, this seems to add a bunch of empty blackness at the end. Or, rather, it condenses the video but keeps the original length and just fills it with solid black.  
  > **username_3**: If you have an audio track in the input which isn't correspondingly sped up, yes, but not otherwise. Add `-an` to disable or `-af atempo=2,atempo=2,atempo=2,atempo=2,atempo=1.875` to speed up the audio as well.  
  > **username_3**: If you do keep audio (without speed up), whether it's black depends on the player's behaviour. In Potplayer, the last frame is frozen.  
  > **username_5**: @Mulvya What's the relation between video speed up factor of 30 and audio tempo speed up of 1.875? Basically I just want to speed up a video 4 times, what should be the arguments for audio speed up in that case?  
  > **username_3**: Audio is sped up using the atempo filter, which only takes values in the range of [0.5-2]. So to make a speed change outside that range, multiple atempo filters have to be daisychained. I have four filters with value of 2 and 1 of 1.875 since `2*2*2*2*1.875=30`. For four times, you need `atempo=2,atempo=2`  
  > **username_6**: What is crf 18?  
  > **username_3**: Constant rate factor - in practice, a measure of the quality/size tradeoff used by the default video encoder (x264) for MP4 and MOVs. Lower is better but bigger. 18 is good; 23 is default.  
  
  ---
  
  ### Answer by username_1 on 2020-05-21. Score: 7
  
  Using FFmpeg's command-line, this is totally possible. I do it to increase the speed of my videos by 10% (increasing both the audio AND video by 10%, without sounding like a chipmunk).
  
  The command to increase your video's speed by 10% is:
  
  ```
  <ffmpeg path> -i <origin video path> -vf "setpts=(PTS-STARTPTS)/1.1" -crf 18 -af atempo=1.1 <output video path>
  
  ```
  
  Here's the exact command line that I use:
  
  ```
  "C:\Program Files\ffmpeg-win64\bin\ffmpeg.exe" -i "G:\minecraft lets play.mp4" -vf "setpts=(PTS-STARTPTS)/1.1" -crf 18 -af atempo=1.1 "G:\minecraft lets play ffmpeg.mp4"
  
  ```
  
  If you want to increase your video's speed by more, or less, then you just change the "1.1" at both lines to something else. "1.1" is 10%. "1.5" is 50%. "3" is 300%. "10" is 1000%.
  
  > **Comments:**
  > **username_2**: great answer! as you mention audio, cheers!  
  
  ---
  
  