ffmpeg concat images use all increase speed

Install ffmpeg on Linuxĭepending of your distribution, installing ffmpeg can be easy or a little tricky. But sometimes you want a still image to last because, well, you want a still image in video. That’s useful if you want to do advanced video editing without using video tools: you just have to build images for each frame with your effects and then you can bundle it in a video. So concretely, if you wanted to do one minute of video based solely on your images, you would need to have 1,800 JPG or PNG files per minute. At 30 frames per second, you change image every 33 milliseconds.

The number of pictures per second is called the frame rate. That’s a lot and that’s how you wonder sometimes how a single image can weight 1 MiB but one minute of 1080p video can weight only 15 MiB. It’s 1,800 frames per minute, 54,000 frames per half hour of video, or 108,000 frames per hour. Generally, videos from United States a contains 30 frames per second – realize a bit. That’s exactly what you see when you pause a video – and when you do so faces generally doesn’t look good! When an image comes from a video, it’s called a frame. Anyway, you can in fact extract a independent image from every image of a video. LCD screens just keep displaying the last image. But it’s not noticeable by human eye because the mechanism is fast enough and because of an optical illusion.īut computers don’t have this problem. In cinema and movie theaters, between each image there’s a black picture because the mechanism has to switch frame and was too slow.

Let me explain.Ī video (even a YouTube video) is a suite of still images that changes quickly. And there’s a reason: videos are based on a series of images. It’s not really hard to integrates images in a video. Video concepts: how images can work in a video If you already used VLC, then you know a bit ffmpeg: VLC uses ffmpeg to decode as many videos as possible.īut before making videos, I need to tell you some concepts so you don’t get lost in the way. It’s the one which supports the greatest number of different codecs. If you don’t know it already, ffmpeg is a software that does video and audio conversion and editing using filters. So you’re interested in building a video based on images? Linux softwares can help you with that task too, and especially one: ffmpeg.

Ffmpeg concat images use all increase speed