Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Mozilla サポートの検索

サポート詐欺に注意してください。 私たちはあなたに通話やショートメッセージの送信、個人情報の共有を求めることはありません。疑わしい行為を見つけたら「迷惑行為を報告」からご報告ください。

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

http://www.johnkhutchison.com/ has MP4 content I can't play

  • 3 件の返信
  • 1 人がこの問題に困っています
  • 6 回表示
  • 最後の返信者: Alex-N

more options

I have numerous MP4 files that play OK, but the web site shown has MP4s where nothing happens when I click the start triangle. I've tried adding VLC media player that does not help.

I have numerous MP4 files that play OK, but the web site shown has MP4s where nothing happens when I click the start triangle. I've tried adding VLC media player that does not help.

すべての返信 (3)

more options

Check the video links. My download managers show no clips.

more options

That web page thinks that Firefox can't play MP4 files:

var video = document.getElementById('video');
if (video.canPlayType && video.canPlayType('video/mp4')) {
	// canPlayType is overoptimistic, so we have browser sniff.
	if (navigator.userAgent.indexOf('WebKit/') <= -1) {
		// Only webkit-browsers can currently play this natively
		fallback(video);
	}
} else {
	fallback(video);
}

That makes the website fallback to a Shockwave Flash player that doesn't seem to work (at least for me on Linux). If I spoof the user agent to Google Chrome (WebKit) then I get a native HTML5 media player that can play the MP4 file.

more options

The answer seems geared to someone who has more knowledge than me. Is there a step-by-step way for me to get past this problem?