[FFmpeg-user] V360 stabilization

[Michael Koch]

Am 29.09.2020 um 22:54 schrieb Michael Koch:
> Hello all,
>
> I've programmed a C# workaround for stabilization of 360° videos. The 
> procedure is as follows:
>
> 1. FFmpeg: From each frame of the equirectangular input video, extract 
> two small images which are 90° apart in the input video. I call them A 
> and B images.
>
> 2. C# code: Analyze the x and y image shift from subsequent A and B 
> images. Calculate how the equirectangular frames must be rotated (yaw, 
> pitch, roll) to compensate the image shifts. This part wasn't easy. 
> Two rotation matrices and one matrix multiplication are required. 
> Write the results to a *.cmd file.
>
> 3. FFmpeg: Read the *.cmd file and apply the rotations with the v360 
> filter. The output video is stabilized.
>
> For details and source code please have a look at chapter 2.78 in my 
> book:
> http://www.astro-electronic.de/FFmpeg_Book.pdf
>
> If anyone wants to implement this in FFmpeg, please feel free to do it.

I've written and tested an improved version for 360° stabilization, it's 
in chapter 2.79.

Michael