blocks|key|2894841|text|根据MPEG§2，video/mp4确实是RFC+4337+-4视频的正确内容类型。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2894842|通常，您可以通过搜索文件扩展名和"IETF“或"RFC”来查找官方的MIME定义。IETF+(Internet+Engineering+Taskforce，因特网工程任务组)发布的RFC+(请求注解)文章定义了许多Internet标准，包括MIME类型。|2894843|entityMap|0|LINK|mutability|MUTABLE|url|http://www.rfc-editor.org/rfc/rfc4337.txt^0|9|9|L|8|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

According to <a href="http://www.rfc-editor.org/rfc/rfc4337.txt" rel="noreferrer">RFC 4337</a> § 2, <code>video/mp4</code> is indeed the correct Content-Type for MPEG-4 video.

Generally, you can find official MIME definitions by searching for the file extension and "IETF" or "RFC". The RFC (Request for Comments) articles published by the IETF (Internet Engineering Taskforce) define many Internet standards, including MIME types.

blocks|key|230387|text|当您的文件中包含视频内容时，应使用video/mp4。如果没有音频，但有音频，则应使用audio/mp4。如果不使用音频和视频，例如，如果文件仅包含字幕轨道或元数据轨道，则MIME应为application/mp4。此外，作为服务器，您应该尝试包含RFC6381中定义的codecs或profiles参数，因为这将帮助客户端在下载文件之前确定是否可以播放该文件。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|230388|entityMap|0|LINK|mutability|MUTABLE|url|https://www.rfc-editor.org/rfc/rfc6381^0|H|9|17|9|2K|F|3R|6|3Y|8|3G|7|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|F|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

<code>video/mp4</code>should be used when you have video content in your file. If there is none, but there is audio, you should use <code>audio/mp4</code>. If no audio and no video is used, for instance if the file contains only a subtitle track or a metadata track, the MIME should be <code>application/mp4</code>.
Also, as a server, you should try to include the <code>codecs</code> or <code>profiles</code> parameters as defined in <a href="https://www.rfc-editor.org/rfc/rfc6381" rel="nofollow noreferrer">RFC6381</a>, as this will help clients determine if they can play the file, prior to downloading it.

blocks|key|3108773|text|根据http://help.encoding.com/knowledge-base/article/correct-mime-types-for-serving-video-files/的说法，.mp4的正确mime类型是video/mp4|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3108774|entityMap|0|LINK|mutability|MUTABLE|url|http://help.encoding.com/knowledge-base/article/correct-mime-types-for-serving-video-files/^0|2P|4|33|9|2|2J|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@$9|S|A|T|1|U]]|E|$]]|$1|F|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

According to <a href="http://help.encoding.com/knowledge-base/article/correct-mime-types-for-serving-video-files/" rel="nofollow noreferrer">http://help.encoding.com/knowledge-base/article/correct-mime-types-for-serving-video-files/</a>, the correct mime type for <code>.mp4</code> is <code>video/mp4</code>

blocks|key|3108794|text|当上传.mp4文件到Perl脚本中时，使用CGI.pm，当打印出上传文件的Content-type时，我看到它是视频/mp。我希望它能帮助一些人。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|BOLD|entityRanges|data|3108795|entityMap^0|11|C|1K|5|0^^$0|@$1|2|3|4|5|6|7|I|8|@$9|J|A|K|B|C]|$9|L|A|M|B|D]]|E|@]|F|$]]|$1|G|3|-4|5|6|7|N|8|@]|E|@]|F|$]]]|H|$]]

When uploading .mp4 file into Perl script, using CGI.pm I see it as video/mp when printing out <code>Content-type</code> for the uploaded file.
I hope it will help someone.

I have two applications as mentioned below:

<ol>
<li>Admin application through which I am able to upload a .mp4 file to the server.</li>
<li>I am trying to download the .mp4 using mobile application in iPad.</li>
</ol>

<hr>

<ul>
<li>The Admin application is made by using asp.net 4.0 and SQL Server, IIS7.</li>
<li>The Mobile application is made of asp.net mvc3, jquerymobile, HTML5.</li>
</ul>

As of now I have added mime type <code>video/mp4</code> for .mp4 in IIS7 mime types section.

When I am trying to download the .mp4 file in iPad I am seeing a dark black screen with cross arrow on it. Can anyone please help me to resolve the issue.

Please tell me whether the mime type <code>video/mp4</code> for .mp4 is correct.

Correct mime type for .mp4

SQL Server

服务器

HTML5

Perl

我有两个应用程序，如下所述：管理应用程序，我可以通过该应用程序将.mp4文件上载到服务器。我正在尝试使用iPad中的移动应用程序下载.mp4。管理应用程序使用asp.net 4.0和SQL Server，IIS7。移动应用程序由asp.net mvc3，jquerymobile，HTML5组成。到目前为止，我已经在.m...

问.mp4的正确mime类型
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