video encoding - ffmpeg overlay duration issue -


i making setting (using anothergui) burn in overlay movie:

-i "<sourcefilename>"  -i "pathto\overlay1080.mov"  -filter_complex overlay=shortest=0 -y  -vcodec prores -profile:v 3  -qscale:v 1 -acodec pcm_s16le -ar 48000 -ac 2   "<outputpath>\forcompfolder\<outputfilename>.mov"

the compositing fine, overlay video 999 frames long , first input video shorter. when render opts length of overlay video. doing wrong?

thanks in advance.


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