avi2gba prepped_video.avi video.bin Then manually inject audio. Use gbafix or a simple Python script to wrap the raw video into a GBA executable header.
# Create a minimal GBA ROM header dd if=/dev/zero of=video_rom.gba bs=1 count=32000 echo -ne "GBA VIDEO\x00\x00\x00\x00\x00\x00\x00\x00\x96\x00\x80\x00\x00\x00\x00\x00" | dd of=video_rom.gba bs=1 seek=0 conv=notrunc # Append the video binary cat video.gbm >> video_rom.gba gbafix video_rom.gba Or use (Game Boy File System) to embed the GBM as a file that a GBA media player (like GBA Media Player) can load. avi to gba video
Run this FFmpeg command:
Example with gbafix (after building a skeleton ROM): avi2gba prepped_video