Making a Frames File

Development
#1

How could I make a frames file like this to play on my Arduboy?

@Mr.Blinky

#2

Ping @Mr.Blinky he is the floating ghost you need to speak with.

1 Like
#3

I used a free image viewer called IrfanView to extract all frames from a video and then used itā€™s batch conversion option to convert all frames to 128x64 1-bit bitmaps. To combine the images into a single data file I used the below python script.

IrfanView

  • Open video with IrfanView > Option > Extract all frames > choose a folder > wait
  • File > batch conversion > browse to the folder in the upper right > click add all
  • Choose output format bitmap
  • check use advanced options > click advanced >
  • if you want to cut out a 2:1 window of the video frame, check Crop option calculate the x,y position and height and width. Make sure Start is set to Left Top
  • Check risize option and enter 128 and 64 pixles
  • Check change color depth and select 2 colors
  • under miscellanous check overwrite existion files and click OK to return to batch conversion screen
    *Select an output folder to save the converter images too. (Click on ā€˜use current look in folderā€™ and add ā€˜convertedā€™ to the path)
    *click ā€˜Start batchā€™ and wait

afbeelding
afbeelding1172Ɨ844 25.1 KB

Python script

copy and paste the below script into a new text file and save it as frames-to-bin.py then drag and drop one of the frames onto the script and it will create a bin file with all the 1K frames.

import sys
import os
from PIL import Image

filename = os.path.abspath(sys.argv[1])
ext = os.path.splitext(filename)[1]
name = filename[:filename.rfind("_")]
digits = (len(filename)-len(name)-5)

f = open("{}s.bin".format(name),'wb')
frame = 0
while True:
  framestr=str(frame)
  framefilename = "{}_{}{}{}".format(name, (digits - len(framestr)) * '0', framestr, ext)
  if os.path.isfile(framefilename):
    sys.stdout.write("saving frame {}\r".format(frame))
    sys.stdout.flush()
    img = Image.open(framefilename).convert("1")
    width, height  = img.size
    pixels = list(img.getdata())
    b = 0
    row = bytearray(width)
    for y in range (0,64,8):
        for x in range (0,width):
            for p in range (0,8):
                b = b >> 1  
                if pixels[(y + p) * width + x] > 0:
                    b |= 0x80
            row[x] = b
        f.write(row)
    frame +=1
  else:
    break  
f.close()
1 Like
#4

Thank you very much.

#5

I know I did this before, I think @mr.blinky gave me this python file directly. Itā€™s not published is it? I think you didnā€™t put it in your python tools because you donā€™t think itā€™s ready?

#6

Just in case someone wants an (open source) command-line based alternative (e.g. for better automation/batching), ffmpeg can also do this.
(Some example frame extraction commands here.)

1 Like
#7

Yeah I gave you a slightly different version. This version is a bit better. Itā€™s not published (elsewhere). Still needs some form of compression :wink:

Interesting, didnā€™t know about ffmpeg.

1 Like
#8

@Mr.Blinky I have another problem. In your ā€œbadapple-frames.binā€ file, some frames might have damaged. Could you fix it at your convenience?
Here is the video showing where the problem is.

#9

Ha! good eye! Thanks for showing where it went wrong. It seems the conversion on white the screens there went wrong.

Iā€™ve updated the badapple-frames.bin file

1 Like
#10

Thank you.

1 Like