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How do I join a image to video using melt command or MTL framework? I tried

melt video1.wmv video2.png -consumer avformat:output.wmv

this command do my task but output video shows image frame for very long time. how can I control duration for image file (video2.png)? I want to show this image for only few seconds, say 3 seconds

I followed this video.

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I got the solution:

melt video1.wmv in=1 out=120 video2.png in=1 out=90 -consumer avformat:file.wmv

The final video will have 120 frames of video1.wmv and only 90 frames out of all frames of video2.png.

I followed this tutorial.

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