https://www.arj.no/tags/ffmpeg/ Recent content in FFmpeg on ARJ (English) https://www.arj.no/images/_F8A4088_doc6pg1cufjdr42ycbfd0e.jpg https://www.arj.no/images/_F8A4088_doc6pg1cufjdr42ycbfd0e.jpg Hugo -- 0.152.2 en-us Alexander Refsum Jensenius. CC-BY-SA 4.0 Fri, 19 Dec 2025 00:00:00 +0000 https://www.arj.no/2025/12/19/insta360-to-equirectangular/ Fri, 19 Dec 2025 00:00:00 +0000 https://www.arj.no/2025/12/19/insta360-to-equirectangular/ Convert Insta360 .insp files to equirectangular projection on Ubuntu with FFmpeg. While writing the blog post on AI-realistic photos, I wanted to include one. https://www.arj.no/2023/10/09/converting-ambisonics-files-to-binaural-audio/ Mon, 09 Oct 2023 00:00:00 +0000 https://www.arj.no/2023/10/09/converting-ambisonics-files-to-binaural-audio/ Converting Ambisonics files to Binaural audio. Ambisonics is a full-sphere surround sound format that captures audio from all directions using spherical. https://www.arj.no/2023/05/25/gopro-max-file-format/ Thu, 25 May 2023 00:00:00 +0000 https://www.arj.no/2023/05/25/gopro-max-file-format/ Understanding the GoPro Max' File Formats. I use a GoPro Max 360-degree camera in my annual StillStanding project. That means that I also have had an excellent. https://www.arj.no/2023/02/22/gopro-flickering/ Wed, 22 Feb 2023 00:00:00 +0000 https://www.arj.no/2023/02/22/gopro-flickering/ Remove GoPro Flickering. I use a GoPro Max 360-degree camera for my daily Still Standing recordings. Unfortunately, I discovered too late that the camera's. https://www.arj.no/2022/08/09/ffmpeg-fade-in-fade-out/ Tue, 09 Aug 2022 00:00:00 +0000 https://www.arj.no/2022/08/09/ffmpeg-fade-in-fade-out/ Add fade-in and fade-out programmatically with FFmpeg. There is always a need to add fade-in and fade-out to audio tracks. Here is a way of doing it for a. https://www.arj.no/2022/07/13/ffmpeg-highpass/ Wed, 13 Jul 2022 00:00:00 +0000 https://www.arj.no/2022/07/13/ffmpeg-highpass/ Removing audio hum using a highpass filter in FFmpeg. Today, I recorded Sound Action 194 - Rolling Dice as part of my year-long sound action project. The idea. https://www.arj.no/2022/06/11/adding-subtitles-to-videos/ Sat, 11 Jun 2022 00:00:00 +0000 https://www.arj.no/2022/06/11/adding-subtitles-to-videos/ Adding subtitles to videos. In my ever-growing collection of FFmpeg-related blog posts, I will today show how to add subtitles to videos. These tricks are. https://www.arj.no/2022/02/12/edit-video-rotation-metadata-in-ffmpeg/ Sat, 12 Feb 2022 00:00:00 +0000 https://www.arj.no/2022/02/12/edit-video-rotation-metadata-in-ffmpeg/ Edit video rotation metadata in FFmpeg. I am recording a lot of short videos these days for my sound actions project. Sometimes the recordings end up being. https://www.arj.no/2022/01/28/preparing-videos-for-futurelearn-courses/ Fri, 28 Jan 2022 00:00:00 +0000 https://www.arj.no/2022/01/28/preparing-videos-for-futurelearn-courses/ Preparing videos for FutureLearn courses. This week we started up our new online course, Motion Capture: The Art of Studying Human Activity, and we are also. https://www.arj.no/2022/01/09/frame-differencing-with-ffmpeg/ Sun, 09 Jan 2022 00:00:00 +0000 https://www.arj.no/2022/01/09/frame-differencing-with-ffmpeg/ Frame differencing with FFmpeg. I often want to create motion videos, that is, videos that only show what changed between frames. Such videos are nice to look. https://www.arj.no/2021/12/21/ffmpeg-v360-processing/ Tue, 21 Dec 2021 00:00:00 +0000 https://www.arj.no/2021/12/21/ffmpeg-v360-processing/ Pre-processing Garmin VIRB 360 recordings with FFmpeg. I have previously written about how it is possible to "flatten" a Ricoh Theta+ recording using FFmpeg. https://www.arj.no/2021/12/19/rendering-4-channel-to-binaural-audio/ Sun, 19 Dec 2021 00:00:00 +0000 https://www.arj.no/2021/12/19/rendering-4-channel-to-binaural-audio/ Rendering 4-channel to binaural audio. I had a period in the early 2000s when I made a few pieces in the genre of electroacoustic music ("tape music"). One of. https://www.arj.no/2021/11/17/preparing-video-for-matlab-analysis/ Wed, 17 Nov 2021 00:00:00 +0000 https://www.arj.no/2021/11/17/preparing-video-for-matlab-analysis/ Preparing video for Matlab analysis. Typical video files, such as MP4 files with H.264 compression, are usually small in size and with high visual quality. https://www.arj.no/2021/10/27/video-rotation/ Wed, 27 Oct 2021 00:00:00 +0000 https://www.arj.no/2021/10/27/video-rotation/ Rotate video using FFmpeg. Here is another FFmpeg-related blog post, this time to explain how to rotate a video using the command-line tool FFmpeg. There are. https://www.arj.no/2021/10/26/cropvideo/ Tue, 26 Oct 2021 00:00:00 +0000 https://www.arj.no/2021/10/26/cropvideo/ Crop video files with FFmpeg. I have previously written about how to trim video files with FFmpeg. It is also easy to crop a video file. Here is a short how-to. https://www.arj.no/2021/10/13/converting-a-wav-file-to-avi/ Wed, 13 Oct 2021 00:00:00 +0000 https://www.arj.no/2021/10/13/converting-a-wav-file-to-avi/ Converting a .WAV file to .AVI. Sometimes, there is a need to convert an audio file into a blank video file with an audio track. This can be useful if you are. https://www.arj.no/2021/06/17/normalize-audio-in-video-files/ Thu, 17 Jun 2021 00:00:00 +0000 https://www.arj.no/2021/06/17/normalize-audio-in-video-files/ Normalize audio in video files. We are organizing the Rhythm Production and Perception Workshop at RITMO next week. As mentioned in another blog post, we have. https://www.arj.no/2021/05/11/ffmpeg-audio-video/ Tue, 11 May 2021 00:00:00 +0000 https://www.arj.no/2021/05/11/ffmpeg-audio-video/ Combining audio and video files with FFmpeg. When working with various types of video analysis, I often end up with video files without audio. So I need to add. https://www.arj.no/2021/03/18/splitting-audio-files/ Thu, 18 Mar 2021 00:00:00 +0000 https://www.arj.no/2021/03/18/splitting-audio-files/ Splitting audio files in the terminal. I have recently played with AudioStellar, a great tool for "sound object"-based exploration and musicking. It reminds me. https://www.arj.no/2021/03/10/matroska-container/ Wed, 10 Mar 2021 00:00:00 +0000 https://www.arj.no/2021/03/10/matroska-container/ Moving to Matroska video containers. The go-to format for video these days is containers with h.264 compression. However, when we are working on video analysis. https://www.arj.no/2021/01/24/container-conversion/ Sun, 24 Jan 2021 00:00:00 +0000 https://www.arj.no/2021/01/24/container-conversion/ Convert between video containers with FFmpeg. In my ever-growing collection of smart FFmpeg tricks, here is a way of converting from one container format to. https://www.arj.no/2021/01/02/create-timelapse-video-from-images-with-ffmpeg/ Sat, 02 Jan 2021 00:00:00 +0000 https://www.arj.no/2021/01/02/create-timelapse-video-from-images-with-ffmpeg/ Create timelapse video from images with FFmpeg. I take a lot of timelapse shots with a GoPro camera. Usually, I do this with the camera's photo setting instead. https://www.arj.no/2020/11/06/ffmpeg-tblend/ Fri, 06 Nov 2020 00:00:00 +0000 https://www.arj.no/2020/11/06/ffmpeg-tblend/ Visual effect of the different tblend functions in FFmpeg. FFmpeg is a fantastic resource for doing all sorts of video manipulations from the terminal. https://www.arj.no/2020/03/20/pixel-array-images-of-long-videos-in-ffmpeg/ Fri, 20 Mar 2020 00:00:00 +0000 https://www.arj.no/2020/03/20/pixel-array-images-of-long-videos-in-ffmpeg/ Pixel array images of long videos in FFmpeg. Continuing my explorations of FFmpeg for video visualization, today I came across this very nice blog post on. https://www.arj.no/2020/03/19/mpeg-2-to-mpeg-4/ Thu, 19 Mar 2020 00:00:00 +0000 https://www.arj.no/2020/03/19/mpeg-2-to-mpeg-4/ Convert MPEG-2 files to MPEG-4. This is a note to self, and could potentially also be useful to others in need of converting "old-school" MPEG-2 files into. https://www.arj.no/2020/03/15/360-flattening/ Sun, 15 Mar 2020 00:00:00 +0000 https://www.arj.no/2020/03/15/360-flattening/ Flattening Ricoh Theta 360-degree videos using FFmpeg. I am continuing my explorations of the great terminal-based video tool FFmpeg. Now I wanted to see if I. https://www.arj.no/2020/03/01/keyframe-displays-ffmpeg/ Sun, 01 Mar 2020 00:00:00 +0000 https://www.arj.no/2020/03/01/keyframe-displays-ffmpeg/ Creating different types of keyframe displays with FFmpeg. In some recent posts I have explored the creation of motiongrams and average images, multi-exposure. https://www.arj.no/2020/02/21/image-masks/ Fri, 21 Feb 2020 00:00:00 +0000 https://www.arj.no/2020/02/21/image-masks/ Creating image masks from video file. As part of my exploration in creating multi-exposure keyframe image displays with FFmpeg and ImageMagick, I tried out a. https://www.arj.no/2020/02/21/keyframe-displays/ Fri, 21 Feb 2020 00:00:00 +0000 https://www.arj.no/2020/02/21/keyframe-displays/ Creating multi-exposure keyframe image displays with FFmpeg and ImageMagick. While I was testing visualization of some videos from the AIST database earlier. https://www.arj.no/2019/11/03/converting-mxf-files-to-mp4-with-ffmpeg/ Sun, 03 Nov 2019 00:00:00 +0000 https://www.arj.no/2019/11/03/converting-mxf-files-to-mp4-with-ffmpeg/ Converting MXF files to MP4 with FFmpeg. We have a bunch of Canon XF105 at RITMO, a camera that records MXF files. This is not a particularly useful file. https://www.arj.no/2018/05/18/trimvideo/ Fri, 18 May 2018 00:00:00 +0000 https://www.arj.no/2018/05/18/trimvideo/ Trim video files using FFmpeg. This is a note to self, and hopefully others, about how to easily and quickly trim videos without recompressing the file. I. https://www.arj.no/2015/04/12/simple-video-editing-in-ubuntu/ Sun, 12 Apr 2015 00:00:00 +0000 https://www.arj.no/2015/04/12/simple-video-editing-in-ubuntu/ Simple video editing in Ubuntu. I have been using Ubuntu as my main OS for the past year, but have often relied on my old MacBook for doing various things that.