CODEWITHSUNDEEP
ffmpeg
emilaz
emilaz

Reputation: 2062

ffmpeg specify order of applied filter

I have a video that I want to first crop, then scale and output the result as images. I've looked around in the docs but couldn't find a definite answer as to in what order ffmpeg applies its filters. Currently, I'm running 

ffmpeg -i vid -filter:v "crop={0}:{1}:{2}:{3}".format(str(width), str(height), str(x_min), str(y_min)) -c:a copy -crf 23 crop_vid

Followed by

ffmpeg -i crop_vid -vf 'scale={0}*iw:{0}*ih'.format(str(resize_factor)) -c:a copy -crf 23 os.path.join(img_path, '%04d.bmp')

I'm running these as subprocesses from a python script, hence the partial python notation. Could I somehow run this as one script ensuring the order of first crop, then scale instead of running ffmpeg twice?

Upvotes: 0

Views: 1031

Answers (1)

Gyan
Gyan

Reputation: 93171

Sure, you need to specify the filters in the required order, separated by a comma.

So -filter:v "crop=W:H:X:Y,scale=W:H"

Upvotes: 2

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