ffmpeg problem with creating thumbnail

[arena18]

I have a tube site and im using this function to generate thumbs from video file

ffmpeg -ss 255 -i test.mp4 -vcodec mjpeg -vframes 1 -an -f rawvideo -s 240x180 test.jpg

Here is thumbs result, this image is just what i need, no border and etc..

i.imgur.com/ePpVA8E.png

but sometimes depending on video size i have thumbs like this

i.imgur.com/VTTESDf.png

Whats the best way to remove this black space from thumbs, but need to keep thumb size 240x180

[Tent Pitcher]

You will need to crop the frame/image to a multiple of your thumbnail before you resize it. The problem is that your thumbnail is a different aspect ratio than the source image. Try cropping it to 1200x900 or whatever the closest ratio to your source is.

-vf crop=width:height:x:y

[arena18]

Yes im try something like this, but problems is because i dont know what video resolution user will upload 4:3 or 16:9, so any trick to detect black area and remove it automaticly, than with imagic i can resize and enhance image?

P.S good example i think you can see on hardsextube, black areas is removed

[dappz-datton]

you need to asking your server support... to fixed that issue on ffmpeg

[arena18]

I'm not sure is server fault

[CPA-Rush]

u have ffmpeg installed on your cp?

[arena18]

Sure that i have it, latest version...!

[CPA-Rush]

nice