Perfect transitions effects with can be done with ffmpeg andÂ
GLTransitions
This require own bild of ffmpeg, please check this repository for additional info and compile requirements.
Video Transition with ffmpeg . Crossfade
ffmpeg -y -i video1.mp4 -i video2.mp4 -filter_complex " \ [0:v] scale=w=min(iw*720/ih\,1280):h=min(720\,ih*1280/iw), \ pad=w=1280:h=720:x=(1280-iw)/2:y=(720-ih)/2, \ fade=out:st=3:d=2:alpha=1, setpts=PTS-STARTPTS [video1]; \ [1:v] scale=w=min(iw*720/ih\,1280):h=min(720\,ih*1280/iw), \ pad=w=1280:h=720:x=(1280-iw)/2:y=(720-ih)/2, \ fade=in:st=0:d=2:alpha=1, setpts='PTS+3/TB' [video2]; \ [video1][video2]overlay[v] " -map "[v]" -c:v h264 -crf 18 \ -preset veryfast crossfade.mp4
All sources in php available on my github