Slow animated WebP image sequence (carousel) - FFmpeg By Example

[eladg]

https://ffmpegbyexample.com/examples/lnigitjg/slow_animated_webp_image_sequence_carousel/

This example shows how to take a couple of images and turn them into a slowly changing animated WebP. This is useful for a "digital pictureframe" style image.

What I find interesting FFmpeg for this example is the usage of two framrate (-r) flags. If the first flag is omitted, some images in the sequence will be skipped. And the second flag determines the speed the images are cycled.

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For WebP specific options and more information, see the relevant WebP documentation in the ffmpeg-codecs page.

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• -r 1 - interpret input image sequence framerate as 1 FPS. This must be equal or lower than the second -r value.

• -i /path/to/sequence/%d.png - path to image sequence where each image is name 1.png to n.png. Note there are no leading zeros in file names.

• -vcodec libwebp - set the video codec to generate WebP images

• -pix_fmt yuv420p - set the pixel format (color space). YUV420 is the only supported one for lossy and RGB is the only supported one for lossless.

• -loop 0 - loop the animated WebP

• -r 1 - set output framerate to 1 FPS (i.e. change the image once per second)