如何使用ffmpeg从图像创建幻灯片？

Question

I want to create a slideshow from images, where each image would be displayed for some period of time (several seconds).

How do I do that?

Currently I was trying to encode short clips with ffmpeg and then stitch those together with mencoder :

        foreach (var item in filePattern)
        {
            var otpt = item.Key + ".mpg";
            Process.Start("ffmpeg",
                string.Format("-y -r 25 -f image2 -vframes 75 -i {0} {1}", item.Value, otpt)//-loop 1
                ).WaitForExit();
        }

ffmpeg -y -r 25 -f image2 -vframes 75 -i input-pattern output does create a file with 1 frame in it, while ffmpeg -y -loop 1 -r 25 -f image2 -vframes 75 -i input-pattern output on windows never finishes (needs ctrl+c to stop); the second command worked on linux for me.

I need to make this work primary on Windows. Which params should I use?

Answer 1

just add -t 3:

-y -r 25 -f image2 -vframes 75 -i {0} -t 3 {1}