[ACCEPTED]-Use FFMpeg to get middle frame of a video?-ffmpeg
This could be simplified, but here's some 3 old PHP code I had lying around that should 2 do the trick. (Add the location to ffmpeg 1 if it's not in your path)
$output = shell_exec("ffmpeg -i {$path}");
preg_match('/Duration: ([0-9]{2}):([0-9]{2}):([^ ,])+/', $output, $matches);
$time = str_replace("Duration: ", "", $matches[0]);
$time_breakdown = explode(":", $time);
$total_seconds = round(($time_breakdown[0]*60*60) + ($time_breakdown[1]*60) + $time_breakdown[2]);
shell_exec("ffmpeg -y -i {$path} -f mjpeg -vframes 1 -ss " . ($total_seconds / 2) . " -s {$w}x{$h} {$output_filename}");
With simple shell scripting you can use 3 ffprobe to get a machine readable duration output, bc to 2 calculate the half point, and ffmpeg to make the 1 frame:
input=input.mp4; ffmpeg -ss "$(bc -l <<< "$(ffprobe -loglevel error -of csv=p=0 -show_entries format=duration "$input")*0.5")" -i "$input" -frames:v 1 half.png
This eliminates any need for PHP, echo, awk, tr, grep, sed, etc.
FFmpeg helps you get the framerate and the 6 length of the video, so you can multiply 5 one by the other and divide by 2 to get 4 the number of the middle frame.
ie for a 3 30 seconds video running at 15 frames per 2 second : 30 * 15 = 450 / 2 = 225, meaning 1 you need to grab the 225th frame.
More Related questions
We use cookies to improve the performance of the site. By staying on our site, you agree to the terms of use of cookies.