Hello,
in the following example I'm grabbing an equirectangular video from the
desktop, convert it to 180° fisheye format and then use the sdl output
device to show the output on a second monitor in realtime. It's working
as expected but there is one thing I don't understand. At the end of the
filter chain I had to insert "format=bgra". It doesn't work if I use
rgb24 or bgrp or no format at all. Why does the sdl output device need a
pixel format with alpha channel?
ffmpeg -f gdigrab -video_size 1920x1080 -i desktop -lavfi
v360=e:fisheye:ih_fov=360:iv_fov=180:h_fov=180:v_fov=180:w=1080:h=1080,format=bgra
-window_borderless 1 -window_x 2340 -window_y 0 -f sdl2 -
It's running with 20fps. Any ideas how to make it faster?
Michael
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