commit 6097317d256e02d60906f7204c6f074656207dff
Author: Uyanide <pywang0608@foxmail.com>
Date:   Wed Mar 18 23:03:59 2026 +0100

    init

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..505a3b1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+# Python-generated files
+__pycache__/
+*.py[oc]
+build/
+dist/
+wheels/
+*.egg-info
+
+# Virtual environments
+.venv
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..24ee5b1
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.13
diff --git a/core.py b/core.py
new file mode 100644
index 0000000..f219b96
--- /dev/null
+++ b/core.py
@@ -0,0 +1,211 @@
+#!/usr/bin/env python3
+import subprocess
+import json
+import time
+import multiprocessing
+import getpass
+import shlex
+from pathlib import Path
+
+class BaseTranscoder:
+    def __init__(self, args, video_defaults, audio_defaults):
+        self.input_path = Path(args.input).resolve()
+        if not self.input_path.exists():
+            raise FileNotFoundError(f"输入文件不存在: {self.input_path}")
+
+        self.vencoder = args.vencoder
+        self.aencoder = args.aencoder
+        self.run_metrics = args.metrics
+        self.notify_mode = args.notify
+
+        self.v_params = (
+            shlex.split(args.vargs) if args.vargs else video_defaults.get(self.vencoder, [])
+        )
+        self.a_params = (
+            shlex.split(args.aargs) if args.aargs else audio_defaults.get(self.aencoder, [])
+        )
+
+        filters = []
+        if getattr(args, "res", None):
+            filters.append(f"scale={args.res}")
+        if getattr(args, "fps", None):
+            filters.append(f"fps={args.fps}")
+        self.vf_string = ",".join(filters) if filters else ""
+
+        self.out_dir = (
+            Path(args.outdir).resolve() if args.outdir else self.input_path.parent
+        )
+        self.out_dir.mkdir(parents=True, exist_ok=True)
+
+        self.basename = self.input_path.stem
+        self.output_path = self.out_dir / f"{self.basename}.{self.vencoder}.mp4"
+        self.log_path = self.out_dir / f"{self.basename}.{self.vencoder}.log"
+        self.vmaf_log_path = self.out_dir / f"{self.basename}.{self.vencoder}.vmaf.json"
+
+        self.temp_files = []
+        self.orig_info = None
+
+    def get_media_info(self, file_path: Path):
+        cmd = [
+            "ffprobe",
+            "-v",
+            "quiet",
+            "-print_format",
+            "json",
+            "-show_format",
+            "-show_streams",
+            str(file_path),
+        ]
+        result = subprocess.run(cmd, capture_output=True, text=True)
+        if result.returncode != 0:
+            return None
+
+        data = json.loads(result.stdout)
+        video_stream = next(
+            (s for s in data.get("streams", []) if s["codec_type"] == "video"), None
+        )
+        if not video_stream:
+            return None
+
+        duration = float(data.get("format", {}).get("duration", 0))
+        bitrate = int(data.get("format", {}).get("bit_rate", 0))
+        fps_str = video_stream.get("r_frame_rate", "0/1")
+
+        nb_frames = video_stream.get("nb_frames")
+        if nb_frames:
+            frame_count = int(nb_frames)
+        else:
+            num, den = map(int, fps_str.split("/"))
+            fps = num / den if den != 0 else 0
+            frame_count = int(duration * fps)
+
+        return {
+            "codec": video_stream.get("codec_name"),
+            "bitrate_kbps": bitrate / 1000,
+            "frame_count": frame_count,
+            "fps_str": fps_str,
+            "width": video_stream.get("width"),
+            "height": video_stream.get("height"),
+        }
+
+    def _run_vmaf_psnr(self, new_info):
+        target_samples = 500
+        n_subsample = max(1, (self.orig_info.get("frame_count", 0) if self.orig_info else 0) // target_samples)
+        threads = multiprocessing.cpu_count()
+        fps = self.orig_info.get("fps_str", "0/1") if self.orig_info else "0/1"
+
+        print(
+            f"\n[Metrics] 启动 VMAF/PSNR 测试 (采样间隔: {n_subsample}, 线程数: {threads}, 强制帧率: {fps})..."
+        )
+
+        out_w = new_info.get("width") if new_info else None
+        out_h = new_info.get("height") if new_info else None
+        orig_w = self.orig_info.get("width") if self.orig_info else None
+        orig_h = self.orig_info.get("height") if self.orig_info else None
+        orig_fps = self.orig_info.get("fps_str", "0/1") if self.orig_info else "0/1"
+        out_fps = new_info.get("fps_str", "0/1") if new_info else "0/1"
+
+        # 使用滤镜链对齐帧率、分辨率和首帧时间戳
+        filters_0 = []
+        if out_fps != orig_fps:
+            filters_0.append(f"fps={orig_fps}")
+        if out_w and out_h and orig_w and orig_h and (out_w != orig_w or out_h != orig_h):
+            filters_0.append(f"scale={orig_w}:{orig_h}:flags=bicubic")
+        filters_0.append("setpts=PTS-STARTPTS")
+        
+        filter_0_str = ",".join(filters_0)
+
+        vmaf_filter = (
+            f"[0:v]{filter_0_str}[dist];[1:v]setpts=PTS-STARTPTS[ref];"
+            f"[dist][ref]libvmaf=feature='name=psnr':log_path='{self.vmaf_log_path.as_posix()}':"
+            f"log_fmt=json:n_subsample={n_subsample}:n_threads={threads}"
+        )
+
+        cmd = [
+            "ffmpeg",
+            "-y",
+            "-i",
+            str(self.output_path),
+            "-i",
+            str(self.input_path),
+            "-lavfi",
+            vmaf_filter,
+            "-f",
+            "null",
+            "-",
+        ]
+        subprocess.run(cmd, check=False)
+
+        try:
+            with open(self.vmaf_log_path, "r", encoding="utf-8") as f:
+                data = json.load(f).get("pooled_metrics", {})
+                vmaf = (
+                    round(data.get("vmaf", {}).get("mean", 0), 2)
+                    if "vmaf" in data
+                    else "N/A"
+                )
+                psnr = (
+                    round(data.get("psnr_y", {}).get("mean", 0), 2)
+                    if "psnr_y" in data
+                    else "N/A"
+                )
+                return vmaf, psnr
+        except Exception as e:
+            print(f"[Metrics Error] 无法解析 VMAF 日志: {e}")
+            return "N/A", "N/A"
+
+    def _generate_log_content(self, encode_time, new_info, vmaf, psnr, extra_info=""):
+        size_ratio = (
+            self.output_path.stat().st_size / self.input_path.stat().st_size
+        ) * 100
+        content = (
+            f"时间: {time.strftime('%Y-%m-%d %H:%M:%S')}\n"
+            f"输入: {self.input_path}\n"
+            f"输出: {self.output_path}\n"
+            f"{extra_info}"
+            f"视频编码器: {self.vencoder} ({' '.join(self.v_params)})\n"
+            f"音频编码器: {self.aencoder} ({' '.join(self.a_params)})\n"
+            f"耗时: {encode_time:.2f} s\n"
+            f"[元数据] {self.orig_info.get('codec','') if self.orig_info else ''} -> {new_info.get('codec','') if new_info else ''} | {self.orig_info.get('bitrate_kbps',0) if self.orig_info else 0:.0f} kbps -> {new_info.get('bitrate_kbps',0) if new_info else 0:.0f} kbps\n"
+            f"[体积比] {size_ratio:.1f}%\n"
+        )
+        if self.run_metrics:
+            content += f"[质量] VMAF: {vmaf} | PSNR(Y): {psnr}\n"
+        content += "-" * 50 + "\n"
+        return content
+
+    def _send_notification(
+        self, encode_time: float = 0.0, new_info=None, vmaf="N/A", full_text="", error=None, extra_title=""
+    ):
+        if self.notify_mode == "none":
+            return
+
+        subject = f"{extra_title}任务{'失败' if error else '完成'}: {self.input_path.name}"
+
+        if self.notify_mode == "mail":
+            body = error if error else full_text
+            try:
+                subprocess.run(
+                    ["mail", "-s", subject, getpass.getuser()],
+                    input=body.encode("utf-8"),
+                    check=True,
+                )
+            except Exception as e:
+                print(f"[Notify Error] 邮件发送失败: {e}")
+
+        elif self.notify_mode == "notify":
+            if error:
+                body = error
+            else:
+                body = f"编码器: {self.vencoder}\n耗时: {encode_time:.1f}s"
+                if self.run_metrics:
+                    body += f"\nVMAF: {vmaf}"
+            try:
+                subprocess.run(["notify-send", subject, body], check=True)
+            except Exception as e:
+                print(f"[Notify Error] DBus 通知发送失败: {e}")
+
+    def _cleanup(self):
+        for temp_file in self.temp_files:
+            if temp_file.exists():
+                temp_file.unlink()
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..7a6e5f5
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,7 @@
+[project]
+name = "transcode"
+version = "0.1.0"
+description = "Add your description here"
+readme = "README.md"
+requires-python = ">=3.13"
+dependencies = []
diff --git a/tc-2pass.py b/tc-2pass.py
new file mode 100755
index 0000000..13dd563
--- /dev/null
+++ b/tc-2pass.py
@@ -0,0 +1,135 @@
+#!/usr/bin/env python3
+import argparse
+import sys
+import time
+import subprocess
+from pathlib import Path
+
+sys.path.append(str(Path(__file__).resolve().parent))
+from transcode_core import BaseTranscoder
+
+VIDEO_DEFAULTS = {
+    "libx265": ["-preset", "slow", "-pix_fmt", "yuv420p10le", "-x265-params", "aq-mode=3:aq-strength=0.8:psy-rd=1.0"],
+    "libaom-av1": ["-cpu-used", "4", "-row-mt", "1", "-pix_fmt", "yuv420p10le", "-aom-params", "tune=0"],
+    "libvvenc": ["-preset", "slow", "-qpa", "0", "-pix_fmt", "yuv420p10le"],
+}
+
+AUDIO_DEFAULTS = {
+    "fdkaac": ["-m", "4"],
+    "opus": ["-c:a", "libopus", "-b:a", "128k", "-vbr", "on"],
+}
+
+class MediaTranscoder2Pass(BaseTranscoder):
+    def __init__(self, args):
+        super().__init__(args, VIDEO_DEFAULTS, AUDIO_DEFAULTS)
+        self.target_bitrate = args.bitrate
+        self.passlog_prefix = self.out_dir / f"passlog_{self.basename}_{self.vencoder}_{int(time.time())}"
+
+    def execute(self):
+        print(f"--- 初始化 2-Pass 转码任务 ---")
+        self.orig_info = self.get_media_info(self.input_path)
+        if not self.orig_info:
+            raise ValueError("无法读取输入文件元数据。")
+
+        start_time = time.time()
+        try:
+            self._run_pass_1()
+            if self.aencoder == "fdkaac":
+                self._run_pass_2_external_audio()
+            else:
+                self._run_pass_2_standard()
+        except subprocess.CalledProcessError as e:
+            self._cleanup()
+            self._send_notification(error=f"转码失败，退出码: {e.returncode}", extra_title="2-Pass转码")
+            sys.exit(f"\n转码失败，退出码: {e.returncode}")
+
+        self._cleanup()
+        encode_time = time.time() - start_time
+
+        new_info = self.get_media_info(self.output_path)
+        vmaf_score, psnr_score = "N/A", "N/A"
+
+        if self.run_metrics and new_info:
+            vmaf_score, psnr_score = self._run_vmaf_psnr(new_info)
+
+        log_content = self._generate_log_content(
+            encode_time, new_info, vmaf_score, psnr_score, extra_info=f"设定码率: {self.target_bitrate}\n"
+        )
+
+        with open(self.log_path, "a", encoding="utf-8") as f:
+            f.write(log_content)
+
+        self._send_notification(encode_time=encode_time, new_info=new_info, vmaf=vmaf_score, full_text=log_content, extra_title="2-Pass转码")
+
+        print(f"\n转码完成！耗时: {encode_time:.2f} 秒")
+        print(f"输出文件: {self.output_path}")
+
+    def _get_base_video_cmd(self, pass_num):
+        cmd = ["-c:v", self.vencoder]
+        if hasattr(self, 'vf_string') and self.vf_string:
+            cmd.extend(["-vf", self.vf_string])
+        cmd.extend([
+            *self.v_params,
+            "-b:v", self.target_bitrate,
+            "-pass", str(pass_num),
+            "-passlogfile", str(self.passlog_prefix),
+        ])
+        return cmd
+
+    def _run_pass_1(self):
+        print("\n[Pass 1] 正在进行第一阶段视频分析...")
+        cmd = ["ffmpeg", "-y", "-i", str(self.input_path), *self._get_base_video_cmd(1), "-an", "-f", "null", "-"]
+        subprocess.run(cmd, check=True)
+
+    def _run_pass_2_external_audio(self):
+        print("\n[Pass 2 - Audio] 提取音频流并使用外部 fdkaac 编码...")
+        temp_wav = self.out_dir / f"temp_{self.input_path.stem}.wav"
+        temp_m4a = self.out_dir / f"temp_{self.input_path.stem}.m4a"
+        self.temp_files.extend([temp_wav, temp_m4a])
+
+        subprocess.run(["ffmpeg", "-y", "-i", str(self.input_path), "-vn", "-c:a", "pcm_s16le", str(temp_wav)], check=True)
+        subprocess.run(["fdkaac"] + self.a_params + [str(temp_wav), "-o", str(temp_m4a)], check=True)
+
+        print("\n[Pass 2 - Video] 正在进行第二阶段最终编码并混流...")
+        cmd = [
+            "ffmpeg", "-y", "-i", str(self.input_path), "-i", str(temp_m4a),
+            "-map", "0:v:0", "-map", "1:a:0",
+            *self._get_base_video_cmd(2), "-c:a", "copy", str(self.output_path),
+        ]
+        subprocess.run(cmd, check=True)
+
+    def _run_pass_2_standard(self):
+        print("\n[Pass 2] 正在进行第二阶段最终编码 (包含音频)...")
+        cmd = ["ffmpeg", "-y", "-i", str(self.input_path), *self._get_base_video_cmd(2), *self.a_params, str(self.output_path)]
+        subprocess.run(cmd, check=True)
+
+    def _cleanup(self):
+        super()._cleanup()
+        for log_file in self.out_dir.glob(f"{self.passlog_prefix.name}*"):
+            try:
+                log_file.unlink()
+            except Exception as e:
+                print(f"[Cleanup Warning] 无法删除临时日志 {log_file.name}: {e}")
+
+def main():
+    parser = argparse.ArgumentParser(description="2-Pass 可配置视频转码脚本")
+    parser.add_argument("-i", "--input", required=True, help="输入视频文件")
+    parser.add_argument("-b", "--bitrate", required=True, help="目标视频码率 (例如: 8M, 3000K)")
+    parser.add_argument("-d", "--outdir", help="指定输出目录 (默认与输入文件同目录)")
+    parser.add_argument("-cv", "--vencoder", choices=VIDEO_DEFAULTS.keys(), default="libx265", help="视频编码器 (默认 libx265)")
+    parser.add_argument("-ca", "--aencoder", choices=AUDIO_DEFAULTS.keys(), default="opus", help="音频编码器 (默认 opus)")
+    parser.add_argument("--vargs", type=str, default="", help="覆盖默认视频编码参数")
+    parser.add_argument("--aargs", type=str, default="", help="覆盖默认音频编码参数")
+    parser.add_argument("--fps", type=str, default="", help="指定帧率 (例如 60, 30000/1001)")
+    parser.add_argument("--res", type=str, default="", help="指定分辨率，格式与scale滤镜相同 (例如 1920:1080)")
+    parser.add_argument("--metrics", action=argparse.BooleanOptionalAction, default=True, help="结束后运行 VMAF/PSNR")
+    parser.add_argument("--notify", choices=["none", "mail", "notify"], default="mail", help="完成后的通知方式 (默认 mail)")
+
+    try:
+        transcoder = MediaTranscoder2Pass(parser.parse_args())
+        transcoder.execute()
+    except Exception as e:
+        sys.exit(f"发生错误: {e}")
+
+if __name__ == "__main__":
+    main()
diff --git a/tc.py b/tc.py
new file mode 100755
index 0000000..a3d2dc6
--- /dev/null
+++ b/tc.py
@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+import argparse
+import sys
+import time
+import subprocess
+from pathlib import Path
+
+# 将当前目录加入 path 以引入 core
+sys.path.append(str(Path(__file__).resolve().parent))
+from transcode_core import BaseTranscoder
+
+VIDEO_DEFAULTS = {
+    "hevc_nvenc": ["-preset", "p7", "-tune", "uhq", "-rc", "vbr_hq", "-cq", "24", "-spatial-aq", "1", "-multipass", "2", "-pix_fmt", "p010le"],
+    "av1_nvenc": ["-preset", "p7", "-tune", "uhq", "-rc", "vbr", "-cq", "32", "-multipass", "2", "-pix_fmt", "p010le"],
+    "libx265": ["-preset", "slow", "-crf", "24", "-pix_fmt", "yuv420p10le", "-x265-params", "aq-mode=3:aq-strength=0.8:psy-rd=1.0"],
+    "libsvtav1": ["-preset", "4", "-crf", "35", "-pix_fmt", "yuv420p10le", "-svtav1-params", "tune=0:enable-qm=1"],
+    "libvvenc": ["-preset", "medium", "-qpa", "0", "-qp", "24", "-pix_fmt", "yuv420p10le"],
+}
+
+AUDIO_DEFAULTS = {
+    "fdkaac": ["-m", "4"],
+    "opus": ["-c:a", "libopus", "-b:a", "128k", "-vbr", "on"],
+}
+
+class MediaTranscoder(BaseTranscoder):
+    def __init__(self, args):
+        super().__init__(args, VIDEO_DEFAULTS, AUDIO_DEFAULTS)
+
+    def execute(self):
+        print(f"--- 初始化转码任务 ---")
+        self.orig_info = self.get_media_info(self.input_path)
+        if not self.orig_info:
+            raise ValueError("无法读取输入文件元数据。")
+
+        start_time = time.time()
+        try:
+            if self.aencoder == "fdkaac":
+                self._encode_with_external_audio()
+            else:
+                self._encode_standard()
+        except subprocess.CalledProcessError as e:
+            self._cleanup()
+            self._send_notification(error=f"转码失败，退出码: {e.returncode}", extra_title="转码")
+            sys.exit(f"\n转码失败，退出码: {e.returncode}")
+
+        self._cleanup()
+        encode_time = time.time() - start_time
+
+        new_info = self.get_media_info(self.output_path)
+        vmaf_score, psnr_score = "N/A", "N/A"
+
+        if self.run_metrics and new_info:
+            vmaf_score, psnr_score = self._run_vmaf_psnr(new_info)
+
+        log_content = self._generate_log_content(
+            encode_time, new_info, vmaf_score, psnr_score
+        )
+
+        with open(self.log_path, "a", encoding="utf-8") as f:
+            f.write(log_content)
+
+        self._send_notification(encode_time=encode_time, new_info=new_info, vmaf=vmaf_score, full_text=log_content, extra_title="转码")
+
+        print(f"\n转码完成！耗时: {encode_time:.2f} 秒")
+        print(f"输出文件: {self.output_path}")
+
+    def _encode_with_external_audio(self):
+        print("\n[Audio] 提取音频流并使用外部 fdkaac 编码...")
+        temp_wav = self.out_dir / f"temp_{self.input_path.stem}.wav"
+        temp_m4a = self.out_dir / f"temp_{self.input_path.stem}.m4a"
+        self.temp_files.extend([temp_wav, temp_m4a])
+
+        subprocess.run(["ffmpeg", "-y", "-i", str(self.input_path), "-vn", "-c:a", "pcm_s16le", str(temp_wav)], check=True)
+        subprocess.run(["fdkaac"] + self.a_params + [str(temp_wav), "-o", str(temp_m4a)], check=True)
+
+        print("\n[Video] 编码视频并混流...")
+        cmd = [
+            "ffmpeg", "-y", "-i", str(self.input_path), "-i", str(temp_m4a),
+            "-map", "0:v:0", "-map", "1:a:0", "-c:v", self.vencoder,
+        ]
+        if self.vf_string:
+            cmd.extend(["-vf", self.vf_string])
+        cmd.extend(self.v_params)
+        cmd.extend(["-c:a", "copy", str(self.output_path)])
+        subprocess.run(cmd, check=True)
+
+    def _encode_standard(self):
+        print("\n[Transcode] 使用 ffmpeg 同时处理视音频...")
+        cmd = ["ffmpeg", "-y", "-i", str(self.input_path), "-c:v", self.vencoder]
+        if self.vf_string:
+            cmd.extend(["-vf", self.vf_string])
+        cmd.extend(self.v_params)
+        cmd.extend(self.a_params)
+        cmd.extend([str(self.output_path)])
+        subprocess.run(cmd, check=True)
+
+def main():
+    parser = argparse.ArgumentParser(description="可配置视频转码脚本")
+    parser.add_argument("-i", "--input", required=True, help="输入视频文件")
+    parser.add_argument("-d", "--outdir", help="指定输出目录 (默认与输入文件同目录)")
+    parser.add_argument("-cv", "--vencoder", choices=VIDEO_DEFAULTS.keys(), default="libsvtav1", help="视频编码器 (默认 libsvtav1)")
+    parser.add_argument("-ca", "--aencoder", choices=AUDIO_DEFAULTS.keys(), default="opus", help="音频编码器 (默认 opus)")
+    parser.add_argument("--vargs", type=str, default="", help="覆盖默认视频编码参数")
+    parser.add_argument("--aargs", type=str, default="", help="覆盖默认音频编码参数")
+    parser.add_argument("--fps", type=str, default="", help="指定帧率 (例如 60, 30000/1001)")
+    parser.add_argument("--res", type=str, default="", help="指定分辨率，格式与scale滤镜相同 (例如 1920:1080)")
+    parser.add_argument("--metrics", action=argparse.BooleanOptionalAction, default=True, help="结束后运行 VMAF/PSNR")
+    parser.add_argument("--notify", choices=["none", "mail", "notify"], default="mail", help="完成后的通知方式 (默认 mail)")
+
+    try:
+        transcoder = MediaTranscoder(parser.parse_args())
+        transcoder.execute()
+    except Exception as e:
+        sys.exit(f"发生错误: {e}")
+
+if __name__ == "__main__":
+    main()