[FFmpeg-user] FFmpeg_Book.pdf 2.148

[Michael Koch]

Am 11.06.2023 um 22:39 schrieb Cecil Westerhof via ffmpeg-user:
> In FFmpeg_Book.pdf chapter 2.148 is about video stabilisation.
> Part of the code is:
>      ffmpeg -i %IN% -vf vidstabdetect -y dummy.mov
>      del dummy.mov
>      ffmpeg -i %IN% -vf vidstabtransform -y %OUT%
>
> But line two removes what is generated in line one. So what are thos
> two lines doing?
>

It's described in the documentation for those two filters. The 
vidstabdetect filter has two outputs. The stabilization data is written 
to a file "transforms.trf", and the output of the filter chain is the 
same as the input. Because this output isn't required, it can be deleted.
The vidstabtransform filter in the third line does by default read the 
file "transforms.trf".

Michael