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 ?
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2 Answers
You can use ffmpeg, 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.
- Thanks a lot. This helps mutch. Is there propably also a way to revirse a video with ffmpeg ?user1344545– user13445452016-05-21 09:32:25 +00:00Commented May 21, 2016 at 9:32
- 2Sure. but it loads the whole file into memory, so I suggest applying it after speed change, like this:
-vf "setpts=(PTS-STARTPTS)/30,reverse"Gyan– Gyan2016-05-21 09:46:51 +00:00Commented May 21, 2016 at 9:46 - 3Note, 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.Joshua Pinter– Joshua Pinter2016-08-10 14:57:23 +00:00Commented Aug 10, 2016 at 14:57
- 2If you have an audio track in the input which isn't correspondingly sped up, yes, but not otherwise. Add
-anto disable or-af atempo=2,atempo=2,atempo=2,atempo=2,atempo=1.875to speed up the audio as well.Gyan– Gyan2016-08-10 15:10:28 +00:00Commented Aug 10, 2016 at 15:10 - 1
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%.
- 1great answer! as you mention audio, cheers!manuelBetancurt– manuelBetancurt2022-10-25 01:47:10 +00:00Commented Oct 25, 2022 at 1:47