the scale command here will scale horizontally to 400 pixels, and keep the correct aspect ratio in y (because the y-axis is told to scale to -1, which is interpreted as 'keep the aspect ratio correct)įfmpeg -i "pyro.%04d.jpg" -lavfi "select=mod(n\,2),setpts=N/(25*TB),crop=in_w:in_h-85:0:0,scale=300:-1:flags=lanczos" -y out.gif.crop will use default width (in_h), and default height minus 85 pixels ( in_h-85), calculated from the top left corner (0,0).The following examples don't do the palette trick, but show off how baroque you can get with ffmpeg to do all sorts of resizing and manipulation. Here's the important bits from that site in 2 lines:įfmpeg -i invideo.mp4 -vf "palettegen" -y out_palette.pngįfmpeg -i invideo.mp4 -i out_palette.png -lavfi "paletteuse" -y out.gif Good guide to how to avoid dithering here, which involves running ffmpeg twice once to generate a palette, the second to generate a gif using that palette. I don't need 99% of its features, and I'm also a grumpy old man locked in my ways. Others have used ShareX on windows and love it. Licecap isn't as fully featured as gifcam, but it runs on windows and osx, and importantly for me, Linux via Wine. You don't get pure green output, gifcam stays happy. A lazy trick i found is to colour correct the display and turn the brightness down a little. It uses pure green internally to key the transparent bits (thus keeping size down), but if you record pure green, like the y-axis handle in houdini, it acts like a flood fill, ruining the resultant gif. One quirk with it though, be careful with bright green.
My new favourite gif tool for windows (thanks Farmfield for the headsup): There's a new contender for the gif making throne! On windows at least ScreenToGif has the good clean capture UI of Licecap, better edit tools that Gifcam, and can write out to mp4 via ffmpeg as well as gif. 10.2 Find all hips in all subdirs and zip them.10.1 Find a word in lots of files of specific type.9.2 Text select blocks with the in and a modifiers.9.1 The :norm command as a easier macro.8.10 Quickly copy one file to a sequence with seq.8.8 Get a seqls/lseq/lss equivalent with pyseq.8.2 Get a decent terminal by replacing cmd.exe with ConEmu.7.1 Capture device audio into OBS with soundflower.5.4 Combine image sequence and audio and fade and offset.5.3 ffmpeg top bottom stereo pano to mono.3.3 ffmpeg insert some silence to the start of an mp3.3.2 ffmpeg quick audio removal and clip start and end.2.11 Controlling mp4 file size with CRF.2.8 ffmpeg resize to power of two dimensions.2.5 ffmpeg cropping to a window on linux.2.3 ffmpeg hold first frame and last frame.2.2 ffmpeg to generate mp4 from image sequence.1.3 ffmpeg to generate super small gifs.
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