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diff --git a/docs/html/http/ngx_http_mp4_module.html b/docs/html/http/ngx_http_mp4_module.html deleted file mode 100644 index 1435ef3d4..000000000 --- a/docs/html/http/ngx_http_mp4_module.html +++ /dev/null @@ -1,90 +0,0 @@ -<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><title>HTTP MP4 Module</title></head><body><center><h3>HTTP MP4 Module</h3></center><center><h4>Summary</h4></center><p> -The module <code>ngx_http_mp4_module</code> provides pseudo-streaming -server-side support for H.264/AAC files typically having filename extensions -<code>.mp4</code>, <code>.m4v</code>, -and <code>.m4a</code>. -</p><p> -Pseudo-streaming works in alliance with conformant Flash players. -A player sends an HTTP request to the server with a start time -argument in the request URI’s query string (named simply -<code>start</code> -and specified in seconds), and the server responds with a stream -so that its start position corresponds to the requested time, -for example: -<blockquote><pre> -http://example.com/elephants_dream.mp4?start=238.88 -</pre></blockquote> -This allows for a random seeking at any time, or starting playback -in the middle of a timeline. -</p><p> -To support seeking, H.264-based formats store the metadata -in the so-called “moov atom.” -It is a part of the file that holds the index information for the -whole file. -</p><p> -To start playback, a player first needs to read metadata. -This is done by sending a special request with the -<code>start=0</code> -argument. Many encoding software will insert the metadata at -the end of the file. This is bad for pseudo-streaming: -the metadata needs to be located at the beginning of the file, -or else the entire file will have to be downloaded before it -starts playing. If a file is well-formed (with metadata at the -beginning of a file), nginx just sends back the contents of a file. -Otherwise, it has to read the file and prepare a new stream so that -metadata comes before media data. -This involves some CPU, memory, and disk I/O overhead, -so it is a good idea to -<a href="http://flowplayer.org/plugins/streaming/pseudostreaming.html#prepare"> -prepare an original file for pseudo-streaming</a>, -rather than having nginx do this on every such request. -</p><p> -For a matching request with a non-zero -<code>start</code> -argument, nginx will read metadata from the file, prepare the -stream starting from the requested offset, and send it to a client. -This has the same overhead as described above. -</p><p> -If a matching request does not include the -<code>start</code> -argument, there is no overhead, and the file is just sent as a static resource. -Some players also support byte-range requests, and thus do not require -this module at all. -</p><p> -This module is not built by default, it should be enabled with the -<code>--with-http_mp4_module</code> -configuration parameter. - -If you were using the third-party mp4 module, be sure to disable it. -</p><p> -A similar pseudo-streaming support for FLV files is provided by the module -<a href="ngx_http_flv_module.html">ngx_http_flv_module</a>. -</p><a name="example"></a><center><h4>Example Configuration</h4></center><p><blockquote><pre> -location /video/ { - mp4; - mp4_buffer_size 1m; - mp4_max_buffer_size 5m; -} -</pre></blockquote></p><a name="directives"></a><center><h4>Directives</h4></center><hr><a name="mp4"></a><strong>syntax</strong>: - <code>mp4</code><br><strong>default</strong>: - <strong>none</strong><br><strong>context</strong>: - <code>location</code><br><p> -Turns on module processing in a surrounding location. -</p><hr><a name="mp4_buffer_size"></a><strong>syntax</strong>: - <code>mp4_buffer_size <code><i>size</i></code></code><br><strong>default</strong>: - <code>mp4_buffer_size 512K</code><br><strong>context</strong>: - <code>http</code>, <code>server</code>, <code>location</code><br><p> -Sets the initial size of a memory buffer used to process MP4 files. -</p><hr><a name="mp4_max_buffer_size"></a><strong>syntax</strong>: - <code>mp4_max_buffer_size <code><i>size</i></code></code><br><strong>default</strong>: - <code>mp4_max_buffer_size 10M</code><br><strong>context</strong>: - <code>http</code>, <code>server</code>, <code>location</code><br><p> -During metadata processing, a larger buffer may become necessary. -Its size cannot exceed the specified <code><i>size</i></code>, -or else nginx will return the server error -500 (Internal Server Error), -and log the following: -<blockquote><pre> -"/some/movie/file.mp4" mp4 moov atom is too large: -12583268, you may want to increase mp4_max_buffer_size -</pre></blockquote></p></body></html> |
