Ffmpeg slow down video and audio 976 before and it does increase the length of the video, which is what I want. org for more details and options. Jul 15, 2017 · I want to change video speed using ffmpeg framework. 0) playback speed. 5*PTS[v];[0:a]atempo=2. My next plan was to place the Video and the Audio in the timeline, slow down the Audio to 0,125x speed, so it would match the Video clip and then just cut in the timeline. Is there a way to use ffmpeg to slow down or speed up a video based off a number I give to it? ffmpeg How to speed up video and audio ffmpeg -i in. mp4 -c:v libx264 -crf 25 -vf "scale=-1:532" path/to/output/file. More info setpts filter documentation FFmpeg Wiki: Speeding up / slowing down video Today, we show how to slow down a video, using ffmpeg. Jun 20, 2017 · Control video quality and encoding speed with -crf and -preset as described in FFmpeg Wiki: H. Nov 22, 2019 · 1 I am using FFMPEG to slow down . Free to use, no registration needed, and accepts all video file types. Change audio tempo with ffmpeg Hi, how can I change tempo of an audio file of an arbitrary value using ffmpeg (cli) on linux? Dec 19, 2024 · Have you ever tried using FFmpeg to make videos from images? Maybe you want to merge product images to create marketing videos or make learning more enjoyable for your students. Whether you’re a video editor, a developer dealing with media files, or an enthusiast curious about video manipulation, you’ll find value in this guide. sh Mar 5, 2014 · Good day people, I was wondering how to encode a video from a speed of 1 x to a one of 5 x, using ffmpeg. Aug 3, 2020 · I want to increase speed on both the sound and the video, while adding pitch to the audio alone. You must register before you can file a report or edit this wiki. More info setpts filter documentation FFmpeg Wiki: Speeding up / slowing down video Apparently when you use -r as an output option it duplicates or drops frames so the video plays at the same speed - in this case, not what you want! But changing the input framerate as above will cause the video to speed up or slow down, with no frames lost or duplicated. My other speed up This document discusses how to use FFmpeg to fix common audio and video sync issues. 5*PTS" tells the video frames (technically their timestamps) how much to multiply by. May 20, 2020 · The problem is when uploading a video, whatever the size of the video, whether its size is 1 megabyte or 2 Giga. Any idea why? ffmpeg Share Improve this question Follow edited Sep 2, 2019 at 19:13 MarianD 1,76121738 asked Aug 30, 2019 at 1:16 Ryan Z 1034 Add a comment 1 Answer Sorted by: ffmpeg - Slow down video and loop/repeat audio I am trying to use ffmpeg to slow down a video speed by 25% (75% speed) without changing the audio speed. To speed up both video and audio: ffmpeg -i input. 5*PTS" output. I am currently using VLC to achieve this, but VLC can only slow down the audio/video within certain limits, 0. mkv -filter:v "setpts=2. I know mkvmerge can do it ( with option --default-duration '0:25f I am able to do slow motion video using following command (found this at How to use slow motion effect in a specific time interval with ffmpeg): ffmpeg -i input. Target video is 60FPS 0. mkv but I have a video I want to speed up by 60 times, not just 2X. Nov 12, 2016 · The tempo value is specified as a multiple of the original speed. 97 and 30fps (so they're in super slow motion). everything mine is public domain (the unlicence). The argument to the setpts filter is a formula for how to set the timestamp. mp4 -filter:v "setpts=0. Speed up videos with FFmpeg can be done using the setpts filter or raw bitstream method. I've seen examples of ffmpeg minterpolate used to convert to higher frame rates, and ffmpeg examples to slow down videos (and increase video duration), but is it possible to do both at once with minterpolate? I'm hoping to get the length to 10 hours, but details about the end frame rate, codecs, etc isn't too important as long as the video I'm trying to use slow motion effect on my videos. mp4 you're using it as an input option, essentially telling ffmpeg to read your 60fps file at 30fps. After the upload process, the processing process starts to upload, there is no problem But when the processing process takes a very long time so that I cannot complete it, what is the solution to that, is there a problem for me or is FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. Check out the official wiki for more methods including how to smooth out the result. Easily speed up or slow down your video in seconds. 4 days ago · My plan was to sync up the Audio with the Video first and then start cutting, but it seems the Synchronize feature in the Media Pool is not for that. 1 seconds long and a Windows computer with ffmpeg. 264 Video Encoding Guide. What software should I use? Aug 13, 2020 · I have 50 videos all in the same folder and I know FFMPEG is frequently used for this type of work. I can set the video speed but can't set the audio speed to 0. -vn option allows you to separate audio from video file and the -stream_loop option allows you to Nov 15, 2019 · You will need to adjust the audio speed to match the video and re-encode it, but you can do this without re-encoding the video. Slowed down video by 50%: ffmpeg -i input. Jul 10, 2024 · This guide will cover how you can use FFmpeg to speed up video and audio, and how to use FFmpeg to slow down videos and audio. I studied the FFmpeg and FFplay documentation, but that is quite overwhelming. I have no idea how to fix it. Regards. 5. exe. 75 # Can't slow down more than by a factor of 0. 0*PTS" output. mp4 This re-encodes the video. 66*PTS - roughly 1. mp4 -vf setpts=2*PTS will slow down the video twice it’s original speed. Here’s how to double the speed of a video using FFmpeg: ffmpeg -i input. Jul 22, 2011 · A complete, cross-platform solution to record, convert and stream audio and video. 5` or Apr 10, 2016 · Say I have a video exactly 25. `librubberband` also support amazing time stretching capability (i. 0 [a] - Feb 1, 2025 · The following command will be a video that plays at half speed with audio that’s both slowed down and pitched down by an octave. Aug 25, 2023 · Hello everyone, I’ve recently been working with Topaz Video AI and noticed an odd behavior. 25x to 4. It's probably fine for 22 minute TV show episodes, but I'd check whether it still lines up towards the end of a movie. mkv" With command map we map appropriate streams to out Nov 22, 2022 · Read audio files and get audio metadata and also perform different audio operations like cropping, playback speed and other operations easily in python. 5 - 2. Perfect for tech enthusiasts and content creators looking to enhance their video content seamlessly. Why is that? On every other computer changing resolution down equals higher speed of conversion. • Separate the audio stream from the video file and loop it twice in a single audio file. ffmpeg - Slow down video and loop/repeat audio I am trying to use ffmpeg to slow down a video speed by 25% (75% speed) without changing the audio speed. For uploading samples > 2. mkv -filter:v "setpts=1. if [ $# -lt 3 ]; then echo 1>&2 "$0: not enough arguments" exit 2 fi rm -f $2 temp. sh infile. - change-speed-of-mp3. 50 to 0. To double the speed of the video, you can use: ffmpeg -i input. 300000 for parameter 'tempo' out of range [0. ffmpeg -i input. mp3 ctrl + c youtube github Apr 8, 2022 · -r takes effect after all filtering, but before encoding of the video stream has taken place. ffmpeg \ -video_size 2560x1440 \ -framerate 60 \ -f x11grab -i :0 \ -map 0 \ -c:a copy \ Jun 22, 2023 · I'm just starting to use ffmpeg to create some videos that consist of: 1 mp4 file, then it overlays a png and adds the audio from a wav file. mpg The video is made, but plays very fast. Programs such as FinalCut or iMovie will probably apply some interpolation to smooth out the signal. Also, you do not get Feb 4, 2021 · If you are interested in keeping the number of frames, but squeezing / stretching the video, see: How to speed up / slow down a video How to change the frame rate There are two ways to change the output frame rate: With the -r option used as an output option With the fps filter There are differences in implementation of those two: -r takes effect after all filtering, but before encoding of the Jul 13, 2022 · Your use case is unique but achievable using FFmpeg, there is no parameter or option to accomplish the task in a single FFmpeg command, you need to follow a few steps mentioned below to get what you want. But the audio stays the length of the old framerate. 5x speed selected in the youtube player, such that the output is the 90fps video at normal speed. Is it possible with handbrake or are there similar tools ? Level up your programming skills with exercises across 52 languages, and insightful discussion with our dedicated team of welcoming mentors. 25*PTS - quadruple the speed setpts=2. 0*PTS (half the speed) reference Sep 17, 2024 · This blog post explores how to effectively use FFmpeg for video editing, including video compression, changing speed without altering audio pitch, and removing silence. Dec 12, 2018 · I've been trying to figure out how to write a filter for ffmpeg to take a set of videos and make them all the same time length. May 21, 2015 · If your file contains standard PTS reference information, I think the best way to change back playback speed will be using the setpts filter. mp3 Quality degradation is imperceptible unless measured statistically. mp4" On May 21, 2016 · 20 Is it possible to speed up a video using handbrake ? I am looking for a software like handbrake to convert videos for faster playback. mp4 -filter:v "setpts=2*PTS" output. mp3 -filter:a "rubberband=pitch=0. FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. The document gives Mar 6, 2020 · This should generate m3u8 file, video+audio segments and audio file in wav. wav files to 20% of their original speed. ffmpeg scripts and tools. Unfortunately, the caveat here is that the tempo must be in the range of 0. I'm trying to modify the speed of a video. 0. This will increase the duration of each frame, effectively slowing down the video. When attempting to slow down videos using the software, I found that while the video itself slows down as intended, the audio remains at its original 1x speed. 5*PTS The filter works in FFmpeg as well. Weirdly, my command runs normally, so maybe ffmpeg rounds the value down to the nearest integer? That is what happens, the issue is that the audio is either slightly too fast or too slow and will be out of sync eventually. Adjust video and audio If you care to sync the audio speed with the video speed, things get a bit more complicated: Oct 23, 2017 · I found this example ffmpeg -i input. In this guidepost, you will learn how to change video speed on FFmpeg. Oct 22, 2025 · Learn to create stunning timelapse and slow-motion effects by changing video speed with FFmpeg. Feb 20, 2023 · Pipe that to a video player like FFplay or VLC. Or just use the defaults if it looks acceptable to you. With this code, the video capture speeds up or slows down, but the audio doesn't. -filter:a atempo=0. May 15, 2014 · Not sure. Here are some useful FFmpeg commands you should know. I would like to learn how to navigate ffmpeg but if there are other free softwares I don't mind using those. First, compute how much you need to adjust the audio. g. Download FFmpeg and apply the appropriate command to adjust your video playback speed here. Installed ffmpeg, using Windows 11 and I already installed yt-dlp and aria2 with chocolatey Jun 29, 2012 · I have managed to play audio files using ffmpeg and AudioTrack class in my android project. For example I have a video that is 35 seconds and a video 15 seconds Sep 12, 2017 · Note about setpts: To double the speed of the video: setpts=0. txt file for FFmpeg to concatenate the original video parts with the adjusted segment. I want it to be a custom percentage so I can increase speed from 0. 9438743126816935, rubberband=tempo=4" -acodec copy fast. I used this command for that: ffmpeg -y -i /storage/extSdCard/Video/1. I want to slow down the first video, then replace its audio with the audio file, then add a video onto the end of the resul Sep 5, 2017 · When changing the video speed, you usually do not have to set -r, but just let ffmpeg change the timestamps of the frames. 5 slows down the audio to 50%. mkv -filter_complex \\ "[0:v]trim=0 Sep 1, 2015 · Note that you only encounter the problem in the first place if your video has an audio track: if not, the duration of the sped-up video will be correct with or without the -an flag. 625*PTS[v];[0:a]atempo=1. 60 etc. mp4 -filter_complex "[0:v]setpts=0. Sep 12, 2021 · I am using the latest version of FFMPEG and am trying to slow video and audio by half This is the best I could come up with The atempo filter is limited to using values between 0. Apr 10, 2016 · Say I have a video exactly 25. Cleans Up: Deletes temporary files created during processing. For example, how do I get from a 10min/60fps video down to 20min/30fps or 30min/20fps? There is no audio track. 3" output. As I can accurately calculate the duration of the video (it is the same as the areas A1+A2), I ended up using audacity to try and fit each variable rate portion manually. Meaning: you're telling ffmpeg 'make this video slow-mo'. mp4 The 0. Concatenates: Creates an input. mp3 -filter:a "atempo=0. To achieve that, remove the `pitch=0. 1-2 still gives reasonably good results and settings like 4-5 tend to be relatively fast but not entirely crap quality. avi -filter "minterpolate='fps=120',setpts=4*PTS" output. m4a . mp3 outfile. It works with various video formats, allowing you to speed up or slow down videos by a specified factor. Which is also why you need to adjust your audio tempo. mp3 FFmpeg video speed-up & slow downIn this chapter, we want to play with a movie clip to make it play faster or slower: Sep 15, 2020 · I am using ffmpeg to set the audio and video speed to 0. Is there anyway I can s ffmpeg scripts and tools. png v. This decelerating effect can be applied to either or both the audio and video streams within a film. I know mkvmerge can do it ( with option --default-duration '0:25f This simple bash script uses ffmpeg to adjust the speed of a video and its associated audio without changing the pitch. After that, we also Jan 10, 2017 · Slower Video Speed ffmpeg -i input. FFMPEG Atempo - Speed Up and Slow Down AudioIn this video we go over how to use the ffmpeg atempo audio filter to speed up audio clips beyond 2 times speed a Oct 5, 2022 · This tutorial shows you how to speed up or slow down video playback using the versatile and open-source FFmpeg command-line tool. With the correct order, ffmpeg compresses the stream to have 30 source frames per second, and then all the fps filter ends up doing* is change the stream metadata to 30 fps Jan 30, 2012 · How to speed up or slow down video using ffmpeg. 55 then 0. 22 Jun 2023 ffmpeg video I used the ‘raw bitstream method’ of ffmpeg to increase the framerate of a video, see trac. Thread Scheduling : FFmpeg dynamically assigns tasks based on available CPU cores. The audio is stream copied, so audio will not be altered. 3" -r 50 -c:v mpeg4 -b:v 1500k -af "atempo=0. mkv For example, to double the speed of the video, you can use: ffmpeg -i input. It is a command-line tool used for editing videos, audio, transcoding, video scaling, effects, and more. mp4 The lower the PTS value, the faster the time-lapse video is generated. Components Documentation Utilities Video scaling and pixel format converter Audio resampler Encoders and decoders (codecs) Bitstream filters Muxers and demuxers (formats) Protocols Input and output devices Filters Jan 30, 2020 · I use ffmpeg to mix an audio file with a single photo to make a video with the following command: ffmpeg -loop 1 -i image -i audio -c:v libx264 -tune stillimage \ 2 days ago · In this guide, we’ll walk through how to resolve this error by converting your MPEG4-encoded video to H. Using too many threads may slow down performance due to excessive context switching and overhead. Using ffmpeg for a 2min30s video it took Nov 5, 2018 · 8 You are currently generating a 120fps video at normal speed. Oct 30, 2021 · I'm trying to record my screen, my mic, and my game audio with ffmpeg. 5*PTS - double the speed setpts=0. Free, client-side processing. Dec 4, 2013 · Hi, When I convert video via ffmpeg with hardware support is much quicker when video size is 1:1 e. mp3 0. The following command transposes down by one semitone and bumps the speed up 4x: ffmpeg -i slow. This command records only my screen. So as I was searching for the code to slow down the audio, I came across this link that provides the filter codes for speeding up or slowing down the video capture and audio. For example, to speed up the video by x2 try: ffplay [INPUT] -vf setpts=0. FFmpeg FFmpeg is a complete, cross-platform solution to record, convert and stream audio and video. 0x speed adjustment. Dec 12, 2019 · I changed the video from 25fps to 23. So when the audio finishes, it plays the audio from the beginning for the remainder of the video. Thanks in advance for any suggestion. If you need to, you can get around this limitation by stringing multiple atempo filters together. It explains that audio can be either too fast or slow compared to the video, ahead of or behind the video. mp4 -vf setpts=2*PTS -filter:a atempo=0. How can I process this video with ffmpeg and slow down BOTH the video and audio together, bringing the audio down a half step (semi-tone) while keeping the video in sync? Dec 1, 2020 · ffmpeg -i path/to/original/file. the setpts filter to slow down is more of a hack anyway, since it just squishes everything or spreads out the samples. 0, setpts=0. No need to separate audio and video beforehand. 5 - 100] Is there a workaround? Any help will be appreciated. Jul 15, 2021 · Using ffmpeg to slow down a video without slowing down the audio ffmpeg -i input. mkv Source If you have audio, see comment below about also slowing down the audio. mp3 -filter:a "atempo=2. mkv -filter_complex "[0:v]setpts=0. m3u8" ^ -i "source. "decode the audio, slow it down (likely with pitch correction) and re-encode" is this possible with FFMPEG ? 2019-12-12T17:07:27. ffmpeg -i input_video. 3*PTS" "SlowVideo25. This might lead to frame drops, which can of course be avoided by setting the proper framerate as you tried, but you have to set it after the input specification. mixed licenses (mostly gnu). I found this command from a blog: ffmpeg -i in "Explore the latest feature from MultiMagix that lets you control the pace of your videos with precision! Whether you're looking to create dramatic slow-motion effects or speed things up for a This video demonstrates how to fix “slowed” audio after it’s been imported into Adobe Premiere Pro or After Effects. m Nov 22, 2019 · 1 I am using FFMPEG to slow down . Jun 27, 2017 · am trying to cut a part of Video Here is the code i have tried Let's say i have 6 seconds video and i want to slow down 2:5 seconds video that 3 second video First approach after searching is, Cu Feb 5, 2024 · I have been recording my desktop at 1920x1080 resolution with the following command with no performance issues: ffmpeg -f gdigrab -draw_mouse 1 -framerate 60 -probesize 42M -rtbufsize 1024M -i des Dec 25, 2024 · Slow down or speed up all MP3 files in a folder with FFmpeg. e. mp4 -vf "setpts=PTS/0. ffmpeg. The raw bitstream method: This method is lossless and apart from changing the timestamps, copies the video stream as-is. #!/bin/sh # Usage: # slow_down. Index General Muxing Transcoding x264 NVENC/NVDEC Editing Trim Loop Speed Up/Slow Down Delay Volume Rotate Scale Slice GIF Draw Metadata Streaming RTP RTSP RTMP HLS DASH SRT NDI Synchronization Latency Devices DirectShow Options General Check version. Adjusts video speed using setpts filter. mp4 -b:v 20000k That's because ffmpeg's code for changing video tempo multiplies PTS timestamp positions, whereas "atempo" for audio assumes a scaling factor to realtime (=1. Oct 5, 2015 · A method that works without ffmpeg having to read and process the file twice is to use a so-called complex filter that manipulates the presentation timestamps of either the video or audio tracks. Let's say I have a 2 minutes long video and I want to use this effect between 20 and 30 seconds. - iulmit/ffmpeg-eladkarako FFmpeg | FFmpeg tutorial | speed up and slow down video | speed up and slow down audio | flutterIf want code from website then check my website where I Uploa May 6, 2022 · 0 I have an old black and white film with audio that was recorded on a phonograph and the playback speed of the audio is a semi-tone higher than it should be. avi -filter_complex [0:v]fps=50. The documentation states that for fast motion: Slow motion: In this case it will be 2 times slower and for the speed up… I'm recording screencasts and some part of the recorded screencasts I would like to speed up using a command line tool like ffmpeg. So, if you want to use this tool, you must learn some of its commands to have a smooth procedure. Mar 16, 2020 · Trying to speed up audio makes all the t's and s's really sharp. 0 (so it can slow it down to no less than half the original speed, and speed up to no more than 100x the input). mkv FFmpeg tutorial - to slow down a video and or audio Speed Change x2 x4 x8 x16 #ffmpeg #TheFFMPEGGuy Jul 6, 2020 · How to speed up or slow down video using FFmpeg. . Note: To enable compilation of this filter, you need to configure FFmpeg with `--enable-librubberband`. For variable frame rate formats, like Matroska, the -r value acts as a ceiling, so that a lower frame rate input stream will pass Aug 30, 2019 · However, the video and audio are way out of sync. Dec 1, 2020 · Speed Up or Slow Down a Video Use the setpts (set presentation timestamp) video filter (-vf). mp4 ctrl + c youtube github Watch on youtube. mp4" On Components Documentation Utilities Video scaling and pixel format converter Audio resampler Encoders and decoders (codecs) Bitstream filters Muxers and demuxers (formats) Protocols Input and output devices Filters May 31, 2025 · Adjust Video Speed - Easily change video playback speed (slow motion or fast forward) online. 5 output. Concatenation: instead of using concat, we open the m3u8 playlist and audio file and merge segments with command: ffmpeg -i "source. 264 using FFmpeg —a powerful, open-source tool for video and audio processing. Note that in the following examples, the audio stream is not changed, so it should ideally be disabled with -an. I need to speed them back up. Aug 1, 2023 · In this article, let’s learn how to loop videos using FFmpeg. This results in audio and video being out of sync, which, as you can imagine, is far from ideal. To do a slow-mo you need to slow it down by 4x ffmpeg -i input. Can I slow it down a bit? (double duration near Personal collection of cheatsheets. It then provides instructions on using FFmpeg parameters like -async and -vsync to adjust the audio timing and automatically or manually sync audio to match the video timestamps. 97, 25, 29. Jan 28, 2025 · Please read the Bug Tracker Manual and Submitting a Bug Report before filing a new report. avi should do the trick. 5*PTS" -c:a copy output. In this guide, learn how to effectively slow down both video and audio using FFMPEG, ensuring they remain synchronized for the perfect playback. 0" -vn output. 976 fps (24000/1001) but I want to convert it to 25fps without reencoding and loosing quality. 3x. I want to use ffmpeg to loop/repeat the audio track in this case. mp4 This May 21, 2019 · In this guide, I will be explaining how to use FFmpeg multimedia framework to do various audio, video transcoding and conversion operations with examples. It should speed up the video up to 30x. Source video is H264 mp4 120FPS, tennis game. 0*PTS - half the speed For example, to double the speed of a video: Jun 2, 2019 · I am joining 50s or more videos of 1,2,3 minutes using MoviePY but it's giving me 20 hours, even though I have 64 GB of ram, i7 and GTX 670, not top of range yet reasonable. 33x speed setpts=0. 0[a]" -map "[v]" -map "[a]" out. Sep 15, 2019 · Unfortunately using the same method for audio in ffmpeg drops a lot of data and results in badly breaking sound (for speed-up at least). This simple bash script uses ffmpeg to adjust the speed of a video and its associated audio without changing the pitch. Audio is less important but a nice to have. mp4 It says: Value 0. Some example values: setpts=0. For maximum performance, use a value equal to the number of CPU cores. 5MB use the VideoLAN File Uploader. Jul 5, 2017 · I'm trying to use ffmpeg to import three files, two videos and one audio. 5x slow motion, to be uploaded to Youtube, to be played at speed 2x to achieve… The following script does this using ffmpeg. 39Z+00:00 0 Gyan Gyan Over a year ago Jun 12, 2016 · I have a mkv (h264) video that is 23. mp4 ffmpeg -i $1 -filter_complex "[0:a]atempo=$3[a]" -map "[a]" -c:a aac temp. com To speed up / slow down audio, you can use “atempo”. I have compiled most commonly and frequently used 20+ FFmpeg commands for beginners. Jun 22, 2023 · Slow down or speed up: altering the speed / framerate with ffmpeg. Is the method to achieve this. For video speed filtering it discusses a little bit about you can change the PTS of each video frame to affect its playback rate, but how is this similarly done for audio? This article delves into how to use FFmpeg to achieve video slow motion playback and answers the core question does slowing down with setpts change the FPS? It explains the method of extending video duration using the setpts filter and emphasizes that this approach typically maintains the output file's marked FPS consistent with the input, achieving slow playback without altering the marked Very slow speeds (35-45Kbit/s) on some videos. mp4 ffmpeg -i temp. I’ve created a bash script as a workaround Jan 15, 2025 · To slow down video playback speed using ffmpeg, you can use the "setpts" filter with a value greater than 1. Note: To enable compilation of this filter, you need to configure FFmpeg with --enable-librubberband. quality trade-off for video encoding. This guide provides the exact commands and filter explanations for perfect results. 0,atempo=2. mkv -filter:v "setpts=0. Here is the command ffmpeg -y -i video. While many video editing tools are available, FFmpeg is a flexible, powerful command-line tool that offers control over video and audio processing. mkv -filter:a "atempo=2. ---This video Aug 31, 2023 · In this article, we explain how to speed up or slow down a video using FFmpeg. : slowdown the audio without changing the pitch). Nov 4, 2024 · FFmpeg is a free and open-source tool that can process various multimedia files, like video and audio. g 1920x1080 to 1920X1080. Cuts Before/After: If valid, it cuts parts of the video before and after the segment. I can change the speed of audio using AudioTrack class setRate method. ffmpeg How to slow down audio ffmpeg -i in. Is there a way to use ffmpeg to slow down or speed up a video based off a number I give to it? Feb 1, 2025 · The following command will be a video that plays at half speed with audio that's both slowed down and pitched down by an octave. Aug 20, 2020 · On doing so, the audio finishes first and the video continues to play for some more seconds. mp4" On Oct 14, 2018 · 2 I have a whole bunch of sports video clips that range from 6 to 25 seconds each, all recorded at 240fps but slowed down to 23. You will also learn how to handle the audio and get it in sync with the sped-up or slowed-down video. The audio files are within many sub-folders and I want a bat file to slow them all down, and replace the original files with this slowed down versions. 5*PTS [v]; [0:a]atempo=2. -------- The command I run in the video is: ffmpeg -I SOURCE_FILENAME. 5 to 2. Use a value greater than 1 to slow down the video. Adjusts audio speed using atempo filter. For an output format like MP4, which defaults to constant frame rate (CFR), -r will generate a CFR stream. “atempo” does not change audio frequency. I have those two ffmpeg commands, but I don't know how to make them work together. I'm making a video using ffmpeg & multiple images with this command: ffmpeg -f image2 -i img%d. mp4 -vf "setpts=1. Today, we show how to speed up and slow down a video using a custom value. Nothing complex. The -r logic depends on the video sync method set (-vsync). The following with quadruple the audio speed: ffmpeg -i input. Audio distorted after slowing down video Hi, I want to slow down a 90fps video, so that it can then be uploaded, at 60fps, to youtube, and then watched with 1. Control audio quality with -b:a as described in FFmpeg Wiki: AAC Audio Encoding Guide. 5*PTS, To slow down your video, you have to use a multiplier greater than 1: setpts=2. wav" ^ -map 0:0 -map 1:0 ^ -c:v copy -c:a copy "out_merged. 67x e. 5 in "setpts=0. Speeding up/slowing down video You can change the speed of a video stream using the setpts video filter. I know that it is possible to use ffmpeg to speed up an entire v To slow down your video, you have to use a multiplier greater than 1: ffmpeg -i input. Sep 7, 2023 · To double the speed of audio: The atempo filter is limited to using values between 0. Dec 12, 2013 · [0, 0, 0, 0, 0, 0, 0, 0]); where FSpeed is a changing value that ranges 0. mp4 Same, but Also Remove Audio and Speed Up (Good for ASL Videos) That's because ffmpeg's code for changing video tempo multiplies PTS timestamp positions, whereas "atempo" for audio assumes a scaling factor to realtime (=1. I would prefer working in the command line to slow down videos mainly. ffmpeg Jan 14, 2023 · FFmpeg is a versatile command-line tool for converting audio and video files. 5 (limitation of ffmpeg). Today, we show how to slow down a video, using ffmpeg. Oct 26, 2018 · Here is a quick example on how you can use FFmpeg to slow down a video. Reference: FFmpeg Wiki: MP3 Audio Encoding Guide. As a bonus, learn how to install FFmpeg on Ubuntu, Mac, Windows, and then loop videos - once, Sep 2, 2018 · The order should be reversed, ffmpeg -i in -filter:v "setpts=PTS/6,fps=30" out With the fps filter first, ffmpeg will insert 25 duplicate frames each second in order to convert 5 fps to 30, and then speed it up 6x. Feb 5, 2024 · How to use FFmpeg with real examples; installation plus copy-paste commands for convert, compress (CRF), trim, concat, audio, subtitles, GIF, speed and more. 5x 0. How do I dull them down? ffmpeg -i input. Choosing the Right Preset Presets control the speed vs. 5 and 100. If you use a larger value, the video will display in slower motion. Supports 0. Nov 28, 2017 · I've been looking into FFmpeg's tools for speeding up and slowing down portions of video using their built in filters (such as here). Parameters can of course be tuned to suit your individual needs. I will keep updating this guide by adding more examples from By putting -r 30 before -i input. - pengdu/ffmpeg Jul 25, 2015 · Very slow/placebo maps to 0, and values in between map accordingly. But when I want to resize 1080p to 320x240 is much much slower speed of converting. mp4 -ar 48000 $2 rm -f temp. 5" -vn out. mkv The filter works by changing the presentation timestamp (PTS) of each Jan 24, 2018 · I'm executing basic ffmpeg command to transcode input MP4 video to output MP4 video (both using H264 as video codec, and stripping out audio, for simplicity): ffmpeg -i input-video.