139 lines
6.0 KiB
Python
Executable File
139 lines
6.0 KiB
Python
Executable File
#!/usr/bin/env python3
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import argparse
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import sys
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import time
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import subprocess
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from pathlib import Path
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from core import BaseTranscoder
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VIDEO_DEFAULTS = {
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"libx265": ["-preset", "slow", "-pix_fmt", "yuv420p10le", "-x265-params", "aq-mode=3:aq-strength=0.8:psy-rd=1.0"],
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"libaom-av1": ["-cpu-used", "4", "-row-mt", "1", "-pix_fmt", "yuv420p10le", "-aom-params", "tune=0"],
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"libvvenc": ["-preset", "slow", "-qpa", "0", "-pix_fmt", "yuv420p10le"],
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}
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AUDIO_DEFAULTS = {
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"fdkaac": ["-m", "4"],
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"opus": ["-c:a", "libopus", "-b:a", "128k", "-vbr", "on"],
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}
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class MediaTranscoder2Pass(BaseTranscoder):
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def __init__(self, args):
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super().__init__(args, VIDEO_DEFAULTS, AUDIO_DEFAULTS)
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self.target_bitrate = args.bitrate
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self.passlog_prefix = self.out_dir / f"passlog_{self.basename}_{self.vencoder}_{int(time.time())}"
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def execute(self):
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print(f"--- 初始化 2-Pass 转码任务 ---")
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self.orig_info = self.get_media_info(self.input_path)
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if not self.orig_info:
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raise ValueError("无法读取输入文件元数据。")
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start_time = time.time()
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try:
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self._run_pass_1()
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if self.aencoder == "fdkaac":
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self._run_pass_2_external_audio()
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else:
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self._run_pass_2_standard()
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except subprocess.CalledProcessError as e:
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self._cleanup()
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self._send_notification(error=f"转码失败，退出码: {e.returncode}", extra_title="2-Pass转码")
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sys.exit(f"\n转码失败，退出码: {e.returncode}")
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self._cleanup()
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encode_time = time.time() - start_time
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new_info = self.get_media_info(self.output_path)
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vmaf_score, psnr_score = "N/A", "N/A"
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if self.run_metrics and new_info:
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vmaf_score, psnr_score = self._run_vmaf_psnr(new_info)
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log_content = self._generate_log_content(
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encode_time, new_info, vmaf_score, psnr_score, extra_info=f"设定码率: {self.target_bitrate}\n"
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)
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with open(self.log_path, "a", encoding="utf-8") as f:
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f.write(log_content)
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self._send_notification(encode_time=encode_time, new_info=new_info, vmaf=vmaf_score,
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full_text=log_content, extra_title="2-Pass转码")
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print(f"\n转码完成！耗时: {encode_time:.2f} 秒")
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print(f"输出文件: {self.output_path}")
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def _get_base_video_cmd(self, pass_num):
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cmd = ["-c:v", self.vencoder]
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if hasattr(self, 'vf_string') and self.vf_string:
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cmd.extend(["-vf", self.vf_string])
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cmd.extend([
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*self.v_params,
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"-b:v", self.target_bitrate,
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"-pass", str(pass_num),
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"-passlogfile", str(self.passlog_prefix),
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])
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return cmd
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def _run_pass_1(self):
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print("\n[Pass 1] 正在进行第一阶段视频分析...")
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cmd = ["ffmpeg", "-y", "-i", str(self.input_path), *self._get_base_video_cmd(1), "-an", "-f", "null", "-"]
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subprocess.run(cmd, check=True)
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def _run_pass_2_external_audio(self):
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print("\n[Pass 2 - Audio] 提取音频流并使用外部 fdkaac 编码...")
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temp_wav = self.out_dir / f"temp_{self.input_path.stem}.wav"
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temp_m4a = self.out_dir / f"temp_{self.input_path.stem}.m4a"
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self.temp_files.extend([temp_wav, temp_m4a])
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subprocess.run(["ffmpeg", "-y", "-i", str(self.input_path), "-vn", "-c:a", "pcm_s16le", str(temp_wav)], check=True)
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subprocess.run(["fdkaac"] + self.a_params + [str(temp_wav), "-o", str(temp_m4a)], check=True)
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print("\n[Pass 2 - Video] 正在进行第二阶段最终编码并混流...")
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cmd = [
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"ffmpeg", "-y", "-i", str(self.input_path), "-i", str(temp_m4a),
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"-map", "0:v:0", "-map", "1:a:0",
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*self._get_base_video_cmd(2), "-c:a", "copy", str(self.output_path),
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]
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subprocess.run(cmd, check=True)
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def _run_pass_2_standard(self):
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print("\n[Pass 2] 正在进行第二阶段最终编码 (包含音频)...")
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cmd = ["ffmpeg", "-y", "-i", str(self.input_path), *self._get_base_video_cmd(2), *self.a_params, str(self.output_path)]
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subprocess.run(cmd, check=True)
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def _cleanup(self):
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super()._cleanup()
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for log_file in self.out_dir.glob(f"{self.passlog_prefix.name}*"):
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try:
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log_file.unlink()
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except Exception as e:
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print(f"[Cleanup Warning] 无法删除临时日志 {log_file.name}: {e}")
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def main():
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parser = argparse.ArgumentParser(description="2-Pass 可配置视频转码脚本")
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parser.add_argument("-i", "--input", required=True, help="输入视频文件")
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parser.add_argument("-b", "--bitrate", required=True, help="目标视频码率 (例如: 8M, 3000K)")
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parser.add_argument("-d", "--outdir", help="指定输出目录 (默认与输入文件同目录)")
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parser.add_argument("-cv", "--vencoder", choices=VIDEO_DEFAULTS.keys(), default="libx265", help="视频编码器 (默认 libx265)")
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parser.add_argument("-ca", "--aencoder", choices=AUDIO_DEFAULTS.keys(), default="opus", help="音频编码器 (默认 opus)")
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parser.add_argument("--vargs", type=str, default="", help="覆盖默认视频编码参数")
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parser.add_argument("--aargs", type=str, default="", help="覆盖默认音频编码参数")
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parser.add_argument("--fps", type=str, default="", help="指定帧率 (例如 60, 30000/1001)")
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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)")
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parser.add_argument("--metrics", action=argparse.BooleanOptionalAction, default=True, help="结束后运行 VMAF/PSNR")
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parser.add_argument("--notify", choices=["none", "mail", "notify"], default="mail", help="完成后的通知方式 (默认 mail)")
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try:
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transcoder = MediaTranscoder2Pass(parser.parse_args())
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transcoder.execute()
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except Exception as e:
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sys.exit(f"发生错误: {e}")
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if __name__ == "__main__":
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main()
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