ffmpeg php get frame / image after half time of the video or after 40 seconds -

hello having code in php , want image after 50% of duration of video , duration of video in variable have installed ffmpeg in php , computer

the page has following code

require 'vendor/autoload.php';         //ececute ffmpeg generate mp4         exec('ffmpeg -i '.$uploadfile.' -f mp4 -s 896x504 '.$new_flv.'');         //execute ffmpeg , create thumb         exec('ffmpeg  -i '.$uploadfile.' -f mjpeg -vframes 71 -s 768x432 -an '.$new_image_path.''); 

i want image after 50% of duration of video , store video duration in variable

please give me suggestions stuck on here

first need video duration in second , need multiply total second 0.5 half.

try one:

$total_sec = exec("ffprobe -loglevel error -show_streams inputfile.mp4 | grep duration | cut -f2 -d="); $total_half_sec = $total_sec * 0.5; exec("ffmpeg  -i source.mp4 -f mjpeg -vframes $total_half_sec -s 768x432 -an destination.jpg"); 

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