Android boot animation is composed of a series of continuous PNG pictures as a frame of animation, and each frame of PNG picture is saved in a compressed way. The saved file name is bootanimation.zip , compression mode must be storage compression. It generally includes one desc.txt file and some part directories

root@lxx-NUC10i7FNH:/home/lxx/Downloads/android_pie/vim3/device/khadas/common/products/mbox/bootanimation# ls -l
total 24
-rw-rw-rw- 1 lxx lxx   74 Aug 17  2015 desc.txt
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:10 part0
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:11 part1
drwxrwxrwx 2 lxx lxx 4096 Mar 18 11:11 part2
drwxrwxrwx 2 lxx lxx 4096 Mar 18 13:41 part3
drwxrwxrwx 2 lxx lxx 4096 Mar 18 13:42 part4

1) desc.txt : animation property description file. Used to set the animation pixel (size), number of frames, number of cycles, file name, etc. The file format needs to be set to ANSI format.

2) Part0: first stage animation picture catalog. Store each PNG picture folder

3) Part1: second stage animation picture catalog. Store each PNG picture folder,Other part folder is similar

desc.txt file contents are as follows:

543 143 60
c 1 30 part0
c 1 0 part1
c 0 0 part2
c 1 64 part3
c 1 15 part4

543 143 60:The first two numbers represent the pixel width and height of the picture, and 60 represents the number of frames, that is, the number of pictures played in one second

c 1 30 part0: c stands for the flag bit, 1 means the number of cycles is 1,0 means infinite loop, 30 is the interval time between current part0 stage and part1 stage ,the time is 30x(1/60)s, and part0 represents the corresponding folder,Other lines are similar

After you custom part folders and desc.txt ,then you can use following linux command to generate bootanimation.zip

zip -r -X -Z store bootanimation part*/* desc.txt 

push bootanimation.zip to system/media ,restart device to confirm

adb push bootanimation.zip system/media/bootanimation.zip