Converting image to videos with different time rate using ffmpeg

[radiaku]

Hello I want converting images to videos with ffmpeg with different time rate, searching everywhere but nothing found. In ffmpeg-documentation too

Material:
1. Disclaimer.jpg
2. Slide1.jpg, Slide2.jpg, Slide3.jgp, ...etc

I was success created video from image with this command:

ffmpeg -f image2 -r 1/7 -i Slide%d.jpg -s 640x388 -vcodec libx264 -y testvaid.mp4

But thats not what I want .
I want to make video with different time rate:

Dislaimer.jpg --> 3 Seconds
Slide%d.jpg --> 7 Seconds

Its that posible doing this with ffmpeg?

[Baldrick]

Nope. I guess you have to convert each and join.

[radiaku]

@Baldrick

thanks for replying, can you explain the scenario and example will be great..