import subprocess

video_a = "/home/honney/projects/mkv/Saga of Tanya the Evil/Season 1/Saga Of Tanya The Evil - S01E01 - The Devil Of The Rhine.mkv"
video_b = "/home/honney/projects/mkv/Saga of Tanya the Evil (2017-2017) [imdbid-tt6455986]/Season 01/Saga of Tanya the Evil S01E001.mkv"

offset_seconds = -0.1918081918081918
offset_ms = offset_seconds * 1000
preview_length = 10
# 0.1 entspricht 1/10 der Geschwindigkeit
speed_factor = 0.1 

filter_complex = (
    f"[1:v]scale=640:-1[left_vid];" 
    f"[0:v]scale=640:-1,hflip,drawtext="
    f"fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf:"
    f"text='Offset\\: {offset_ms:.2f}ms':"
    f"x=10:y=10:fontsize=24:fontcolor=white:box=1:boxcolor=black@0.5[right_vid];"
    f"[left_vid][right_vid]hstack=inputs=2"
)

# Schritt 1: Video rendern
cmd_ffmpeg = [
    "ffmpeg", "-y",
    "-itsoffset", f"{offset_seconds:.6f}", "-i", video_b,
    "-i", video_a,
    "-filter_complex", filter_complex,
    "-t", str(preview_length),
    "-c:v", "libx264",
    "-crf", "18",
    "-preset", "fast",
    "sync_preview.mp4"
]

# Schritt 2: MPV starten
cmd_mpv = [
    "mpv",
    f"--speed={speed_factor}",
    "--title=Sync-Check (1/10 Speed)",
    "sync_preview.mp4"
]

print("Rendere Vorschau...")
subprocess.run(cmd_ffmpeg)

print("Starte MPV...")
subprocess.run(cmd_mpv)