CODEWITHSUNDEEP
phpffmpeg
skrilled
skrilled

Reputation: 5371

ffmpeg generate thumbnail with aspect ratio, but X seconds into video

So this command works for generating a thumbnail 5 seconds into the video, with a size of 300x300:

$cmd = '/usr/local/bin/ffmpeg -i '.$this->getUploadRootDir().'/'.$fname.' -ss 00:00:05 -f image2 -vframes 1 -s 300x300 '.$this->getUploadRootDir().'/thumb_'.$output;

However, I want to keep the aspect ratio so I changed my code to this:

$cmd = "/usr/local/bin/ffmpeg -i ".$this->getUploadRootDir()."/".$fname." -ss 00:00:5 -f image2 scale='min(300\, iw):-1' ".$this->getUploadRootDir()."/thumb_".$output;

The above code correctly sizes the image, however it's of the first frame in the video.. I need the thumbnail to be 5 seconds in. Any help would be much appreciated.

Upvotes: 2

Views: 5742

Answers (2)

Sébastien
Sébastien

Reputation: 12139

@alexbuisson has the correct answer, but just to confirm as I'm playing with ffmpeg today:

This works for me:

ffmpeg -i "my_video.mp4" -ss 00:00:05 -f image2 -vf scale="min(300\, iw):-1" -vframes 1 "capture.jpg"

I get one Jpeg 300 px wide with the correct image ratio.

So adapted to your code this becomes:

$cmd = "/usr/local/bin/ffmpeg -i ".$this->getUploadRootDir()."/".$fname." -ss 00:00:05 -f image2 -vf scale='min(300\, iw):-1' ".$this->getUploadRootDir()."/thumb_".$output;

Upvotes: -1

alexbuisson
alexbuisson

Reputation: 8469

You can do that with a command line similar to:

ffmpeg -i inputVideo -vf scale='min(300,iw)':-1 -ss 00:00:05 -f image2 -vframes 1 thumbnail.jpg

So in your script, add -vf (video filter) before scale and reorder input and output parameters like below:

$cmd = "/usr/local/bin/ffmpeg -i ".$this->getUploadRootDir()."/".$fname." -vf scale='min(300\, iw):-1' -ss 00:00:5 -f image2 -vframes 1 ".$this->getUploadRootDir()."/thumb_".$output;

Upvotes: 8

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