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I am generating series of images for text scrolling, I need to overlay those images on a video at specific interval (for example from 10-15sec), how can we do that using ffmpeg?

Sandeep Manne
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    This problem has come up at various times here on SO, e.g., [here](http://stackoverflow.com/q/7979585/85950), [here](http://stackoverflow.com/q/9429194/85950), [here](http://stackoverflow.com/q/9423843/85950), [here](http://stackoverflow.com/q/4089214/85950), and so far the only known solution is splitting the movie into pieces, overlaying on the desired pieces and then putting the pieces back together. Not ideal. – blahdiblah May 10 '12 at 06:34

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According to FFmpeg developer Stefano Sabatini, this cannot currently be done.

Right now you can't do that by using the overlay, you need a multi-steps process, where you need to split the file, overlay just in the interested segments and merge again the modified segments, or create an ad-hoc video to overlay which shows the image only in the interested intervals.

ffmpeg.org/pipermail/ffmpeg-user/2012-January/004062.html

Zombo
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