undo the media format convertion action

sentence_api/processing.py

@@ -1,11 +1,10 @@
-import json
 import logging
 import shutil
 import subprocess
 import tempfile
 import uuid
 from pathlib import Path
-from typing import Any, Dict, List, Optional, Tuple
+from typing import Any, Dict, List, Optional
 
 from .audio_metrics import (
     AudioAnalysisError,
@@ -86,134 +85,6 @@ def _ensure_webm_cues_front(filepath: Path) -> None:
         tmp.unlink(missing_ok=True)
 
 
-_IOS_VIDEO_CODECS = {"h264", "hevc"}
-_IOS_AUDIO_CODECS = {"aac", "mp3", "ac3", "eac3", "alac"}
-
-
-def _ffprobe_bin() -> Optional[str]:
-    ffprobe = shutil.which("ffprobe")
-    if ffprobe:
-        return ffprobe
-    ffmpeg = shutil.which("ffmpeg")
-    if ffmpeg:
-        candidate = str(Path(ffmpeg).with_name("ffprobe"))
-        if Path(candidate).is_file():
-            return candidate
-    return None
-
-
-def _probe_stream_codecs(filepath: Path) -> Tuple[Optional[str], Optional[str]]:
-    ffprobe = _ffprobe_bin()
-    if ffprobe is None:
-        return None, None
-    completed = subprocess.run(
-        [
-            ffprobe,
-            "-hide_banner",
-            "-loglevel",
-            "error",
-            "-show_streams",
-            "-of",
-            "json",
-            str(filepath),
-        ],
-        capture_output=True,
-        text=True,
-        timeout=60,
-    )
-    if completed.returncode != 0:
-        return None, None
-    try:
-        payload = json.loads(completed.stdout or "{}")
-    except json.JSONDecodeError:
-        return None, None
-    video_codec = None
-    audio_codec = None
-    for stream in payload.get("streams") or []:
-        codec_type = stream.get("codec_type")
-        codec_name = stream.get("codec_name")
-        if codec_type == "video" and video_codec is None and codec_name not in {"mjpeg", "png"}:
-            video_codec = codec_name
-        elif codec_type == "audio" and audio_codec is None:
-            audio_codec = codec_name
-    return video_codec, audio_codec
-
-
-def _needs_ios_compatible_transcode(video_codec: Optional[str], audio_codec: Optional[str]) -> bool:
-    if video_codec is None and audio_codec is None:
-        return False
-    video_ok = video_codec is None or video_codec in _IOS_VIDEO_CODECS
-    audio_ok = audio_codec is None or audio_codec in _IOS_AUDIO_CODECS
-    return not (video_ok and audio_ok)
-
-
-def _ensure_ios_compatible_media(filepath: Path) -> None:
-    """Transcode AV1/VP9/Opus etc. to H.264/AAC so iOS AVPlayer can show video."""
-    video_codec, audio_codec = _probe_stream_codecs(filepath)
-    if not _needs_ios_compatible_transcode(video_codec, audio_codec):
-        return
-    ffmpeg = shutil.which("ffmpeg")
-    if ffmpeg is None:
-        raise RuntimeError(
-            f"iOS cannot play {video_codec}/{audio_codec}; ffmpeg is required to transcode {filepath.name}"
-        )
-    tmp = filepath.with_suffix(".ios_tmp.mp4")
-    command = [
-        ffmpeg,
-        "-hide_banner",
-        "-loglevel",
-        "error",
-        "-y",
-        "-i",
-        str(filepath),
-        "-map",
-        "0:v:0",
-        "-map",
-        "0:a:0?",
-        "-vf",
-        r"scale=w=min(1920\,iw):h=-2",
-        "-c:v",
-        "libx264",
-        "-preset",
-        "veryfast",
-        "-crf",
-        "23",
-        "-pix_fmt",
-        "yuv420p",
-        "-c:a",
-        "aac",
-        "-b:a",
-        "128k",
-        "-ac",
-        "2",
-        "-movflags",
-        "+faststart",
-        str(tmp),
-    ]
-    logger.info(
-        "Transcoding %s for iOS playback (%s/%s -> h264/aac)",
-        filepath.name,
-        video_codec,
-        audio_codec,
-    )
-    try:
-        completed = subprocess.run(command, capture_output=True, text=True, timeout=7200)
-        if completed.returncode != 0 or not tmp.is_file() or tmp.stat().st_size <= 0:
-            message = (completed.stderr or "").strip() or "unknown ffmpeg error"
-            raise RuntimeError(
-                f"Could not transcode {filepath.name} from {video_codec}/{audio_codec} to H.264/AAC: {message[-2000:]}"
-            )
-        tmp.replace(filepath)
-    except Exception:
-        tmp.unlink(missing_ok=True)
-        raise
-    video_codec, audio_codec = _probe_stream_codecs(filepath)
-    if _needs_ios_compatible_transcode(video_codec, audio_codec):
-        raise RuntimeError(
-            f"Transcoded {filepath.name} is still not iOS-compatible ({video_codec}/{audio_codec})"
-        )
-    logger.info("iOS-compatible transcode finished: %s", filepath.name)
-
 
 class VideoProcessor:
     def __init__(
@@ -240,7 +111,6 @@ class VideoProcessor:
         work_path: Optional[Path] = None
         try:
             _ensure_webm_cues_front(media_path)
-            _ensure_ios_compatible_media(media_path)
             if self.transcriber.available:
                 work_path = self.settings.work_dir / f"{video_hash}-{uuid.uuid4().hex}.wav"
                 extract_audio(media_path, work_path)