320 lines
9.7 KiB
Python
320 lines
9.7 KiB
Python
"""
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fcco-Converter V2 – Konvertierungsmodul
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Enthält die FFmpeg-basierte Audio-Konvertierung mit static-ffmpeg.
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Unterstützt erweiterte Einstellungen (Bitrate, Sample-Rate, Kanäle, VBR/CBR).
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"""
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import os
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import subprocess
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from pathlib import Path
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from typing import Callable
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import static_ffmpeg
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from .metadata import apply_id3_tags
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def _ensure_ffmpeg() -> tuple[str, str]:
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"""Stellt sicher, dass ffmpeg und ffprobe verfügbar sind.
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Returns:
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(ffmpeg_path, ffprobe_path)
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"""
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ffmpeg_path, ffprobe_path = static_ffmpeg.run.get_or_fetch_platform_executables_else_raise()
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return ffmpeg_path, ffprobe_path
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def get_duration(file_path: Path, ffprobe_path: str) -> float:
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"""Ermittelt die Dauer einer Audiodatei in Sekunden."""
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cmd = [
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ffprobe_path,
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"-v", "error",
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"-show_entries", "format=duration",
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"-of", "default=noprint_wrappers=1:nokey=1",
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str(file_path),
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]
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try:
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result = subprocess.check_output(
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cmd, universal_newlines=True, stderr=subprocess.DEVNULL
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).strip()
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return float(result)
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except (subprocess.CalledProcessError, ValueError):
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return 0.0
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def _build_ffmpeg_cmd(
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ffmpeg_path: str,
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input_path: Path,
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output_path: Path,
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audio_settings: dict,
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threads: int = 0,
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) -> list[str]:
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"""Baut den ffmpeg-Befehl basierend auf den Audio-Einstellungen.
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Args:
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ffmpeg_path: Pfad zur ffmpeg-Binary.
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input_path: Quell-Audiodatei.
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output_path: Ziel-Ausgabedatei.
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audio_settings: Dict mit Audio-Konfiguration.
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threads: Thread-Anzahl (0 = auto).
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Returns:
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Liste der Befehlsargumente.
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"""
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output_format = audio_settings.get("output_format", "mp3")
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encoding_mode = audio_settings.get("encoding_mode", "CBR")
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bitrate = audio_settings.get("bitrate", "192")
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vbr_quality = audio_settings.get("vbr_quality", "2")
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sample_rate = audio_settings.get("sample_rate", "Original")
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channels = audio_settings.get("channels", "Original")
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overwrite = audio_settings.get("overwrite_existing", True)
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cmd = [ffmpeg_path, "-i", str(input_path)]
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# Threads
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cmd.extend(["-threads", str(threads) if threads > 0 else "0"])
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# Format-spezifische Codec-Einstellungen
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if output_format == "mp3":
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cmd.extend(["-c:a", "libmp3lame"])
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if encoding_mode == "VBR":
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cmd.extend(["-q:a", vbr_quality])
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else: # CBR
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cmd.extend(["-b:a", f"{bitrate}k"])
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elif output_format == "flac":
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cmd.extend(["-c:a", "flac"])
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elif output_format == "ogg":
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cmd.extend(["-c:a", "libvorbis"])
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if encoding_mode == "VBR":
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# OGG VBR: Qualität 0–10 (wir mappen 0–9 auf 1–10)
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q = min(10, max(0, 10 - int(vbr_quality)))
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cmd.extend(["-q:a", str(q)])
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else:
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cmd.extend(["-b:a", f"{bitrate}k"])
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elif output_format == "wav":
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cmd.extend(["-c:a", "pcm_s16le"])
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# Sample-Rate
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if sample_rate != "Original":
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cmd.extend(["-ar", sample_rate])
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# Kanäle
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if channels == "Mono":
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cmd.extend(["-ac", "1"])
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elif channels == "Stereo":
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cmd.extend(["-ac", "2"])
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# Überschreiben
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if overwrite:
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cmd.append("-y")
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else:
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cmd.append("-n")
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# Keine Video/Bilder-Streams übernehmen (verhindert Konflikte mit eigenen Covern)
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cmd.append("-vn")
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cmd.append(str(output_path))
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return cmd
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def convert_single_file(
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input_path: Path,
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output_path: Path,
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ffmpeg_path: str,
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ffprobe_path: str,
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audio_settings: dict | None = None,
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threads: int = 0,
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progress_callback: Callable[[int], None] | None = None,
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) -> None:
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"""Konvertiert eine einzelne Audiodatei.
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Args:
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input_path: Pfad zur Quelldatei.
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output_path: Pfad für die Zieldatei.
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ffmpeg_path: Pfad zur ffmpeg-Binary.
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ffprobe_path: Pfad zur ffprobe-Binary.
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audio_settings: Dict mit Audio-Konfiguration (aus config).
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threads: Anzahl der Threads (0 = auto).
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progress_callback: Wird mit Prozent (0–100) aufgerufen.
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Raises:
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RuntimeError: Bei Fehlern in der Konvertierung.
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"""
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if audio_settings is None:
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audio_settings = {"output_format": "mp3", "bitrate": "192", "encoding_mode": "CBR"}
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output_path.parent.mkdir(parents=True, exist_ok=True)
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duration = get_duration(input_path, ffprobe_path)
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if duration <= 0:
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raise RuntimeError(f"Dauer der Datei konnte nicht ermittelt werden: {input_path.name}")
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cmd = _build_ffmpeg_cmd(ffmpeg_path, input_path, output_path, audio_settings, threads)
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process = subprocess.Popen(
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cmd,
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stderr=subprocess.PIPE,
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stdout=subprocess.DEVNULL,
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universal_newlines=True,
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)
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while True:
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line = process.stderr.readline()
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if not line:
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break
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if "time=" in line and progress_callback:
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try:
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time_str = line.split("time=")[1].split(" ")[0]
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h, m, s = map(float, time_str.split(":"))
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current_time = h * 3600 + m * 60 + s
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percentage = min(int((current_time / duration) * 100), 100)
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progress_callback(percentage)
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except (ValueError, IndexError):
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pass
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process.wait()
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if process.returncode != 0:
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raise RuntimeError(f"FFmpeg-Fehler (Code {process.returncode}) bei: {input_path.name}")
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def convert_file_entry(
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entry: dict,
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index: int,
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export_dir: Path,
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meta: dict,
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use_subdirs: bool,
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ffmpeg_path: str,
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ffprobe_path: str,
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audio_settings: dict | None = None,
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threads: int = 0,
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progress_callback: Callable[[int, int, str], None] | None = None,
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cover_data: bytes | None = None,
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cover_mime: str = "image/jpeg",
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) -> tuple[int, str, str | None]:
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"""Konvertiert eine Datei und schreibt die Metadaten.
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Returns:
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(index, filename, error_or_None)
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"""
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if audio_settings is None:
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audio_settings = {"output_format": "mp3", "bitrate": "192", "encoding_mode": "CBR"}
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file_path = Path(entry["full_path"])
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title = file_path.stem
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output_format = audio_settings.get("output_format", "mp3")
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try:
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if use_subdirs and entry["rel_dir"]:
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output_dir = export_dir / entry["rel_dir"]
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else:
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output_dir = export_dir
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output_file = output_dir / f"{title}.{output_format}"
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def _on_progress(pct: int):
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if progress_callback:
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progress_callback(index, pct, title)
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convert_single_file(
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input_path=file_path,
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output_path=output_file,
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ffmpeg_path=ffmpeg_path,
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ffprobe_path=ffprobe_path,
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audio_settings=audio_settings,
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threads=threads,
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progress_callback=_on_progress,
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)
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# ID3-Metadaten nur für MP3 schreiben
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if output_format == "mp3":
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apply_id3_tags(
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mp3_path=output_file,
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title=title,
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artist=meta.get("artist", ""),
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album=meta.get("album", ""),
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track_number=index + 1,
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year=meta.get("year", ""),
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cover_data=cover_data,
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cover_mime=cover_mime,
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)
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return (index, f"{title}.{output_format}", None)
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except Exception as e:
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return (index, file_path.name, str(e))
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def run_batch_conversion(
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entries: list[dict],
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export_dir: Path,
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meta: dict,
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use_subdirs: bool,
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audio_settings: dict | None = None,
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max_workers: int = 0,
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progress_callback: Callable[[int, int, str], None] | None = None,
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completion_callback: Callable[[list[str], list[tuple[str, str]]], None] | None = None,
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) -> None:
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"""Führt die Batch-Konvertierung aller Dateien durch."""
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if audio_settings is None:
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audio_settings = {"output_format": "mp3", "bitrate": "192", "encoding_mode": "CBR"}
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ffmpeg_path, ffprobe_path = _ensure_ffmpeg()
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if max_workers <= 0:
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max_workers = os.cpu_count() or 1
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successful_files = []
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errors = []
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# Cover-Bild einmalig in den Arbeitsspeicher laden, um Dateisperren (Locking)
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# bei parallelem Zugriff durch Windows Defender/Antivirus zu vermeiden
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cover_data = None
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cover_mime = "image/jpeg"
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cover_path_str = meta.get("cover")
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if cover_path_str:
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cp = Path(cover_path_str)
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if cp.exists():
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if cp.suffix.lower() == ".png":
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cover_mime = "image/png"
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with open(cp, "rb") as f:
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cover_data = f.read()
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with ThreadPoolExecutor(max_workers=max_workers) as executor:
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futures = {
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executor.submit(
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convert_file_entry,
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entry=entry,
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index=idx,
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export_dir=export_dir,
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meta=meta,
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use_subdirs=use_subdirs,
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ffmpeg_path=ffmpeg_path,
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ffprobe_path=ffprobe_path,
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audio_settings=audio_settings,
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threads=0,
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progress_callback=progress_callback,
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cover_data=cover_data,
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cover_mime=cover_mime,
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): idx
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for idx, entry in enumerate(entries)
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}
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for future in as_completed(futures):
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index, filename, error = future.result()
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if error:
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errors.append((filename, error))
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if progress_callback:
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progress_callback(index, 100, filename)
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else:
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successful_files.append(filename)
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if progress_callback:
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progress_callback(index, 100, filename)
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if completion_callback:
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completion_callback(successful_files, errors)
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