Its possible to run cropdetect and crop in one line and get thumbs from video?

something like this

ffmpeg -ss 1 -i 0.flv -vf cropdetect=24:16:0,crop=w:h:x:y -vcodec mjpeg -vframes 1 -an -f rawvideo -s 240x180 0.jpg

Or maybe need to run in 2 line, first run cropdetect and than run crop and generate thumbs from video, but in this way i need to get value from cropdetect?

php ffmpeg
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