Convert to WEM using Wwise.
ffmpeg -i audio/audio.wav -ss 00:00:04 audio/audio_front.wav
ffmpeg -i audio/audio.wav -t 00:00:54 audio/audio_back.wav
ffmpeg -i audio/audio.wav -af "volume=enable='between(t,54,100)':volume=0" audio/audio_muted.wav
ffmpeg -i audio/audio.wav -af "afade=t=in:st=0:d=5" audio/audio_fadein.wav
ffmpeg -i audio/audio.wav -af "afade=t=out:st=10:d=5" audio/audio_fadeout.wav
Convert to BK2 using RAD Video Tools.
ffmpeg -i video/video.mp4 -ss 00:00:04 -c:v copy -c:a copy -crf: 0 video/video_front.mp4
ffmpeg -i video/video.mp4 -t 00:00:54 -c:v copy -c:a copy -crf: 0 video/video_back.mp4
ffmpeg -i video/video.mp4 -vf "fade=t=in:st=0:d=5" -crf: 0 video/video_fadein.mp4
ffmpeg -i video/video.mp4 -vf "fade=t=out:st=10:d=5" -crf: 0 video/video_fadeout.mp4