Output file includes only the first video file, not includes the next second videos

[bichkhe]

I built and compile ffmpeg with gltransition would be ok.

I use ubuntu 20.04 WSL to build and check gltransition

But when I try to run command

Xvfb :1 -screen 0 1280x1024x16
export DISPLAY =:=1
ffmpeg -i media/2.mp4 -i media/1.mp4 -i media/0.mp4 -filter_complex gltransition -y out6.mp4 -v debug

Everything seems go well but the output only include the first video. It means the output is lack of videos 1.mp4 and 0.mp4

I have tried install ffmpeg library and check anything. Any suggestions for this problems ?