その後もRaspberry Pi 3 Model B (RPi3)および同+ (RPi3+)で，ATOM Tech社のATOM Cam 2が出力するRTSPを受信して地デジテレビに表示しています．<\/p>\n\n\n\n
画質はきれいで暗視性能も良く，その辺は問題ないのですが，やはりあいかわらず不安定性にさいなまれています．まあ業務用の監視カメラに比べるとシステム全体の価格が2〜3桁も違うのでそこら辺はアイデアで対処していきます．<\/p>\n\n\n\n
不安定性はいくつかあって，ATOM Cam 2に起因するもの，RPi3(+)に起因するものがあります．<\/p>\n\n\n\n
ATOM Cam 2は連続運用していると，まずhackで動いているFTPクライアントが落ちます．次にRTSPサーバーが落ちます．また，1台だけ，1番古い個体ですが，これはWi-Fi接続が切れます．<\/p>\n\n\n\n
それらを回避する方法として，いつの頃からか定期的にリブートする仕組みが取り入れられました．Wi-Fiが落ちる一番古い個体は毎日1回，その他は週に3〜4回リブートするように設定しました．これでしばらく様子を見たいと思います．<\/p>\n\n\n\n
また，RPi3(+)のほうも，RTSPの視聴に使用しているVLCが時々落ちますので，これもリスタートしたいのですが，ChatGPTに嘘を教えられて遠回りしてしまいました．<\/p>\n\n\n\n
結局，VLCを起動するrun_vlc.service, run_vlc.timerファイルとは別に，<\/p>\n\n\n\n
systemctl --user restart run_vlc<\/code><\/pre>\n\n\n\nを実行するための，rerun_vlc.serviceとrerun_vlc.timerを作りました．ATOM Cam 2がリブートする2分後に実行するように設定しました．<\/p>\n\n\n\n
また，現状ではRPi3+のほうがよく固まるので，ATOM Cam 2のリブートの2分後に加えて，早朝にも一度実行するように設定しました．<\/p>\n\n\n\n
これでしばらく様子を見ます．<\/p>\n","protected":false},"excerpt":{"rendered":"
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\u305d\u308c\u3089\u3092\u56de\u907f\u3059\u308b\u65b9\u6cd5\u3068\u3057\u3066\uff0c\u3044\u3064\u306e\u9803\u304b\u3089\u304b\u5b9a\u671f\u7684\u306b\u30ea\u30d6\u30fc\u30c8\u3059\u308b\u4ed5\u7d44\u307f\u304c\u53d6\u308a\u5165\u308c\u3089\u308c\u307e\u3057\u305f\uff0eWi-Fi\u304c\u843d\u3061\u308b\u4e00\u756a\u53e4\u3044\u500b\u4f53\u306f\u6bce\u65e51\u56de\uff0c\u305d\u306e\u4ed6\u306f\u9031\u306b3\u301c4\u56de\u30ea\u30d6\u30fc\u30c8\u3059\u308b\u3088\u3046\u306b\u8a2d\u5b9a\u3057\u307e\u3057\u305f\uff0e\u3053\u308c\u3067\u3057\u3070\u3089\u304f\u69d8\u5b50\u3092\u898b\u305f\u3044\u3068\u601d\u3044\u307e\u3059\uff0e 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