Split recording with Picamera

[EvanS1]

Looking to achieve two things with a raspberry pi and pi cam but can't work out the best way to approach it.

I have the camera working using the record. sequence code from the pi website. I would like to spilt recording into a new file on a keypress.

I would also like to add a text annotation based on a different keypress. I currently have annotation showing current time which works I want a separate counter annotation showing the count from the keypress.

Sorry feel like both should be simple and asked before but can't seem to find the answers.

Thanks in advance

[Edit to add a bit more context] - I am trying to record a video split into separate files with each video a set length. say 2 mins, This bit I understand. I want to have a counter displayed on the screen which increments with a key press (probably spacebar). I also want to display current time. I can put both bits of information using annotate.text but would rather have 2 distinct boxes.

import picamera
import datetime as dt
import functools
import operator 
##initialise camera
print('running')

def convertTuple(tup):
    str = functools.reduce(operator.add, (tup))
    return str

with picamera.PiCamera() as camera:
    camera.resolution = (1280, 720)
    camera.framerate = 24
    camera.start_preview(fullscreen=False, window = (100, 20, 640, 480))
    camera.annotate_background = picamera.Color('black')
    text = ('finish',dt.datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
    text = convertTuple(text)
    camera.annotate_text = text
    start = dt.datetime.now()
    sheetcount = 0

    while (dt.datetime.now() - start).seconds < 30:
        for filename in camera.record_sequence(
                '%d.h264' % i for i in range(1, 11)):
            currentfile = dt.datetime.now()
            sheetcount +=1
            while (dt.datetime.now() - currentfile).seconds < 10:
                text = ('Finish Sheet ',str(sheetcount),' ',dt.datetime.now().strftime('%Y-%m-%d %H:%M:%S'))
                text = convertTuple(text)
                camera.annotate_text = text
                camera.wait_recording(0.2)
 

    camera.stop_recording()
    print('stopped')