[FFmpeg-user] V360 stabilization

[Paul B Mahol]

On 10/11/20, Michael Koch <astroelectronic at t-online.de> wrote:
> 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.

Your book is full or factual errors,

Notice to anyone: do not use this thing for anything serious.