slide Wipe effects with ImageMagick tool and ffmpe

问题:

I have to do a four slide effects named 'Wipe Up', 'Wipe Down', 'Wipe Right', 'Wipe Left'. Like curtain of two images for each type. I think it can be possible with cropping of images with 'convert'

convert 01.jpg -crop 1920x5 output_%03d.jpg

where i can get sequence of images and compose at same time to the second image(What I don't know..) And then I can build video from this sequence of images with ffmpeg:

ffmpeg -i output_%03d.jpg out.mp4

Maybe someone can help me with compossing of images in the same time when I croping? Thanks for any suggestions!

PS: all images have fixed dimensions: 1920x1080

回答1:

You could use ImageMagick's MIFF format (Multiple Image File Format) to send a stream of multiple, cropped images to another invocation of ImageMagick to put them together in a video sequence. So assuming you start with this:

and did this

convert input.png -crop 1920x10 miff:- | convert - -loop 0 out.gif

you would get this