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Today's Topics:

   1. Keystone correction (Nicholas Robinson)


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Message: 1
Date: Sun, 3 May 2020 12:35:52 +0100
From: Nicholas Robinson <n...@bottlehall.co.uk>
To: motion-user@lists.sourceforge.net
Subject: [Motion-user] Keystone correction
Message-ID: <6d7b2a95-bf73-4edd-b7bd-7809e0228...@bottlehall.co.uk>
Content-Type: text/plain;       charset=utf-8

Hi

I would like to correct the keystone effect caused by having to place my camera 
in a slightly awkward position.

I?ve played around with FFmpeg and it works very nicely with the perspective 
filter. I have tried to find a way of piping the frames captured by motion into 
FFmpeg so that the corrected image is displayed on the webcam but no success so 
far. The FFmpeg filter options only appear to work with outputting the video to 
files. I?ve also tried using FFMPeg to stream video using UDP but although I 
can use ffplay to capture the stream on local and remote machines, I haven?t 
found a way of getting motion to use this as a netcam video source.

Is there an easy way of doing this?

Thanks

Nick





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