"BMP4" is the newer format. Try BMP2 or BMP3 instead, to get an older format.
How to convert between bitmap (.bmp) file format types using mogrify?
Pregunta
How can I convert these BMP files to an older format?
I tried:
mogrify -format bmp -define bmp:format=bmp4 *.bmp
But it didn't work.
Solución
Licenciado bajo: CC-BY-SA con atribución
No afiliado a StackOverflow