Qualitative coding block video player

block_player_vlc.py

import vlc
import tkinter as tk
from tkinter import filedialog
import argparse
import time
import threading
import os

# --- Parametry ---
block_length = 10  # sekund
player = None
media = None
current_block = None
current_index = 0
block_label = None
start_block = 0
track_id = 1

# --- GUI ---
def update_block_label():
    start = current_index * block_length
    end = start + block_length
    block_label.config(text=f"{time.strftime('%H:%M:%S', time.gmtime(start))} - {time.strftime('%H:%M:%S', time.gmtime(end))} ({track_id})")

def on_key(event):
    global current_index
    key = event.keysym

    if key in ["Right", "Left", "space"]:
        pos = player.get_time() // 1000
        current_index = pos // block_length

    if key == "Right":
        next_block()
    elif key == "Left":
        prev_block()
    elif key == "space":
        replay_block()
    elif key.isdigit():
        change_audio_track(int(key))
    elif key.startswith("KP_") and key[3:].isdigit():
        change_audio_track(int(key[3:]))

def change_audio_track(index):
    global track_id
    if index == 0:
        player.audio_set_track(-1)
        track_id = -1
    else:
        track_id = index
        player.audio_set_track(index)
    update_block_label()

def next_block():
    global current_index
    current_index += 1
    player.set_time(current_index * block_length * 1000)
    player.play()
    update_block_label()

def prev_block():
    global current_index
    current_index = max(0, current_index - 1)
    player.set_time(current_index * block_length * 1000)
    player.play()
    update_block_label()

def replay_block():
    player.set_time(current_index * block_length * 1000)
    player.play()

def update():
    global current_index
    while True:
        time.sleep(0.2)
        state = player.get_state()
        if state == vlc.State.Playing:
            pos = player.get_time() // 1000
            new_block = pos // block_length
            if new_block != current_index:
                current_index = new_block
                update_block_label()
            if pos % block_length == block_length - 1:
                player.pause()

# --- Hlavní část ---
parser = argparse.ArgumentParser()
parser.add_argument("file", help="Video soubor")
parser.add_argument("--start", type=int, default=0, help="Startovní čas v sekundách")
args = parser.parse_args()

start_block = args.start // block_length
current_index = start_block

instance = vlc.Instance()
player = instance.media_player_new()
media = instance.media_new(args.file)
player.set_media(media)
player.play()

# Počkej, až se player přepne do Playing
for _ in range(100):
    if player.get_state() == vlc.State.Playing:
        break
    time.sleep(0.05)

player.set_time(start_block * block_length * 1000)

# GUI
root = tk.Tk()
root.title("Block Player")
root.geometry("400x100")
root.bind("<Key>", on_key)

block_label = tk.Label(root, text="", font=("Courier", 18))
block_label.pack(pady=20)
update_block_label()

threading.Thread(target=update, daemon=True).start()
root.mainloop()