Safer ffmpeg kill, POST process/service actions, ARM encoder from hardware.env, filter_threads scaling

Made-with: Cursor

scripts/hardware_probe.py

@@ -145,15 +145,33 @@ def build_profile() -> dict:
     return profile
 
 
+def suggest_video_encoder(profile: dict) -> str:
+    """在 Linux 上根据 ffmpeg 能力与探测结果给出可选硬件编码器名（供 douyin→YouTube 读取 LIVE_VIDEO_ENCODER）。"""
+    text = run_text(["ffmpeg", "-hide_banner", "-encoders"])
+    if not text:
+        return ""
+    hwaccels = set(profile.get("ffmpeg_hwaccels") or [])
+    if "h264_rkmpp" in text and Path("/dev/mpp_service").exists():
+        return "h264_rkmpp"
+    if "h264_v4l2m2m" in text and "v4l2m2m" in hwaccels:
+        return "h264_v4l2m2m"
+    return ""
+
+
 def write_outputs(profile: dict) -> None:
     CONFIG_DIR.mkdir(parents=True, exist_ok=True)
     JSON_PATH.write_text(json.dumps(profile, indent=2, ensure_ascii=False), encoding="utf-8")
+    enc = suggest_video_encoder(profile)
     env_lines = [
         f"LIVE_HW_DECODER={profile['recommendation']['video_decoder']}",
         f"LIVE_HDMI_PLAYER={profile['recommendation']['hdmi_player']}",
         f"LIVE_BROWSER_HWACCEL={profile['recommendation']['browser_hwaccel']}",
         f"LIVE_STABILITY_MODE={profile['recommendation']['stability_mode']}",
     ]
+    if enc:
+        env_lines.append(f"LIVE_VIDEO_ENCODER={enc}")
+    else:
+        env_lines.append("# LIVE_VIDEO_ENCODER=  # optional: h264_v4l2m2m / h264_rkmpp when ffmpeg supports it")
     ENV_PATH.write_text("\n".join(env_lines) + "\n", encoding="utf-8")