edit-asciicast.py

import sys
import os
import json
import asciinema.asciicast as asciicast
import asciinema.asciicast.frames as frames


# run me with:
#   python3 edit-asciicast.py original.cast edited.cast


def write_json_line(f, value):
    line = json.dumps(value, ensure_ascii=False, indent=None, separators=(', ', ': '))
    f.write(line + '\n')


with asciicast.open_from_url(sys.argv[1]) as cast:
    stdout = cast.stdout()
    stdout = frames.to_relative_time(stdout)

    header = {
        'version': 2,
        'width': 80, # cast.width,
        'height': 24 # cast.height
    }

    with open("/tmp/foo.cast", mode='w') as f:
        write_json_line(f, header)

        for t, text in stdout:
            write_json_line(f, [t, "o", text])

os.system("vim /tmp/foo.cast")

with asciicast.open_from_url("/tmp/foo.cast") as cast:
    stdout = cast.stdout()
    stdout = frames.to_absolute_time(stdout)

    header = {
        'version': 2,
        'width': 80, # cast.width,
        'height': 24 # cast.height
    }

    with open(sys.argv[2], mode='w') as f:
        write_json_line(f, header)

        for t, text in stdout:
            write_json_line(f, [t, "o", text])

os.unlink("/tmp/foo.cast")