Problems with watermark filter

[MarwenSami]

Hello,

I would like to add a watermark on a video, why should I add ->format() before saving? is it possible to keep the original format of the input video?
When I choose WebM the video get cropped to less than 1s.
How can I change the time of appearing and disappearing of the watermark? Should I create a custom filter?

Thank you.

[pascalbaljet]

I'll look into this problem next week!

[pascalbaljet]

The save method of the underlying package requires a FormatInterface. You can try to recreate the format of the original video.

Custom filters are supported through the SimpleFilter object:

use FFMpeg\Filters\Audio\SimpleFilter;

$media->addFilter(new SimpleFilter([
    '-hls_time', 9, 'etc..',
]))->export()->save('video.m3u8');