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Questions tagged [slowmotion]

46 questions
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Applying two filters at once with FFMPEG -filter_complex and -vf

I have need to make a slowmotion video with overlay png. Source video is 240fps and h265 (HEVC) I want to make a 24fps video with -vf "setpts=(10/1)*PTS" Overlay .png image with -filter_complex "overlay=10:10" My code: ffmpeg -i input.mp4 -i…
Vadim
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AVPlayer does not keep the slo-motion effect

After recording a slo-motion video (the activeFormat, the activeVideoMinFrameDuration and the activeVideoMaxFrameDuration properties on the AVCaptureDevice object have been changed to the proper values), the slo-motion effect is missing when the…
remy_jourde
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ios - record video with high frame rate, and low video size

I'm trying to record a video at 120fps, in 640x480. I can set the fps with: // currentCamera is an AVCaptureDevice, session is an AVCaptureSession let input = try AVCaptureDeviceInput(device: currentCamera) session.addInput(input) let…
Guig
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slow motion video not playing in slow motion on non apple platforms

I'm able to record slow motion videos at 120fps using AVFoundation. These videos play as expected on iphone and mac quicktime player. But other players like videojs and my own player[AVPlayer] are not able to play it in slow motion. But if I create…
user4848830
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slow speed of specific set of frames from video in android project

I need to implement an app, where video is being showing on video view. User select specific range of frames from video and that frames speed slow down. Basically i am done with showing frames of video and user can also select set of frames. Next…
Amna Mirza
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Playing slow motion videos from camera make it loses slow motion effect

So, I have a custom picker controller in which I can select videos and play them. Beforehand, I was struggling to play slow motion videos (only no-slow-motion videos were playing) but after searching I found the solution here. How to access…
Ramon Goncalves da Silva
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How to programmatically record high speed videos (60-120fps) on android

I have a piece of code that can use the android camera to record videos at QUALITY_HIGH using MediaRecorder and the camera api 1. The camera code is based off: https://github.com/Glamdring/EasyCamera And the video recording might resemble this: How…
Francois Coulombe
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Slow motion camera preview android

It seems that most Android devices, even if they support slow motion recording, do not expose these settings via the official API. On newer Samsung phones you can enable a slow-motion preview via CameraParameter parms.set("fast-fps-mode",…
Friedrich
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Setting high frame rate recording in Swift

i'm trying to create an app to record video at 120fps but i'm having troubles. First, when print(device.activeFormat), i get this in the logs AVCaptureDeviceFormat: 0x13fe49890 'vide'/'420v' 1920x1080, { 2- 30 fps}, fov:58.080, supports vis, max…
CarlosBF
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Import slow-mo video into app

Playing around slow-mo video lately. Looks like it's a video with adjustable "slow-mo period", and tightly integrated with iOS itself. Say I write an app to mess around with the video, do you think it's possible to get iOS handles or APIs that…
Kitetaka
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Python: Displaying video in slow motion

I'm currently working on an experiment that requires participants to respond, as fast as possible, to a number which gradually appears on the screen (the opacity rate changes over time) by pressing the corresponding button on the keyboard. For each…
Roel van Dooren
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UWP Video SlowMotion and Reverse Effect

I am developing an UWP Desktop Application, where I would like to capture a video with my WebCam and apply some Video Effects on it. I am using MediaComposition, MediaClip, MediaOverlay to composite multiple videos and intro pngs as a composition…
radik86
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ffmpeg copy codec outputs in slowmotion

i have the following scenario that is driving me crazy: i have a capture device. Here the ffprobe on it: pi@skycam:~ $ ffprobe /dev/video0 ffprobe version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2007-2020 the FFmpeg developers built with gcc 8…
Rudi
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Timelapse (1/6 fps) from slo-mo (240 fps) with ffmpeg

I recorded slo-mo video on an iPhone SE (2) by mistake instead of timelapse. I know there's a lot of answers to this question here, but I'm trying again and again and always something's wrong (like a video that has a correct total no. of frames, but…
baskak
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Ideas for Efficient Slow Motion Video Playback in Raspberry Pi

I'm new to Python and the Raspberry Pi, and I'm trying to write a program to record 8 sec video then play it back in slow motion. It doesn't have to be top quality video either, it just needs to run the program without a long delay. A few years ago…
Jakub
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