php_PHP チュートリアルで FLV ビデオ時間を取得する

phpでflv時間を取得! ソースコードあり!手に取って使用するだけです。とてもシンプルです。

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<li class="alt"><span><span><?php </span></span></li><li><span> </span></li><li class="alt"><span> </span><span class="keyword">function</span><span> BigEndian2Int(</span><span class="vars">$byte_word</span><span>, </span> <span class="vars">$signed</span><span> = false) { </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$int_value</span><span> = 0;  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$byte_wordlen</span><span> = </span><span class="func">strlen</span><span>(</span><span class="vars">$byte_word</span><span>);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="keyword">for</span><span> (</span><span class="vars">$i</span><span> = 0; </span><span class="vars">$i</span><span> < </span><span class="vars">$byte_wordlen</span> <span>; </span><span class="vars">$i</span><span>++) </span></li><li> <span> </span></li><li class="alt"><span> { </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$int_value</span><span> += ord(</span><span class="vars">$byte_word</span><span>{</span><span class="vars">$ i</span><span>}) * pow(256, (</span><span class="vars">$byte_wordlen</span>) <span> - 1 - </span><span class="vars">$i</span><span>));  </span></li><li><span> </span></li><li class="alt"><span> } </span></li><li><span> </span></li><li class="alt"><span> </span><span class="keyword">if</span><span> (</span><span class="vars">$signed</span><span>) </span></li> <li><span></span></li> { <li class="alt"><span></span></li> <li><span></span></li> <li class="alt"><span>$ Sign_mask_bit</span><span class="vars"> = 0x80 << (8 * (</span><span>$byte_wordlen</span><span class="vars"> - 1));  </span><span></span></li> <li><span></span></li> <li class="alt"><span>if</span><span class="keyword"> (</span><span>$int_value</span><span class="vars"> & </span><span>$sign_mask_bit</span><span class="vars">) </span><span></span></li> <li><span></span></li> { <li class="alt"><span></span></li> <li><span></span></li> <li class="alt"><span>$int_value</span> <span class="vars"> = 0 - (</span><span>$int_value</span><span class="vars"> & (</span><span>$sign_mask_bit</span><span class="vars"> - 1));  </span><span></span></li> <li><span></span></li> } <li class="alt"><span></span></li> <li><span></span></li> } <li class="alt"><span></span></li> <li><span></span></li> <li class="alt"><span>戻る</span><span class="keyword"> </span><span>$int_value</span><span class="vars">;  </span><span></span></li> <li><span></span></li> } <li class="alt"><span></span></li> <li><span></span></li> <li class="alt"><span>function</span><span class="keyword"> getTime(</span><span>$name</span><span class="vars">){ </span> <span></span></li> <li><span></span></li> <li class="alt"><span>if</span><span class="keyword">(!</span><span>file_exists </span><span class="func">(</span><span>$name</span><span class="vars">)){ </span><span></span></li> <li><span></span></li> <li class="alt"><span>return</span><span class="keyword">;  </span><span></span></li> <li><span></span></li> } </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$flv_data_length</span><span>=</span><span class="func">filesize</span><span>(</span><span class="vars">$name</span><span>);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$fp</span><span> = @</span><span class="func">fopen</span><span>(</span><span class="vars">$name</span><span>, </span><span class="string">rb</span><span>);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$flv_header</span><span> = </span><span class="func">fread</span><span>(</span><span class="vars">$fp</span><span>, 5);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="func">fseek</span><span>(</span><span class="vars">$fp</span><span>, 5, SEEK_SET);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$frame_size_data_length</span><span> =BigEndian2Int(</span><span class="func">fread</span><span>(</span><span class="vars">$fp</span><span>, 4));  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$flv_header_frame_length</span><span> = 9;  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="keyword">if</span><span> (</span><span class="vars">$frame_size_data_length</span><span> > </span><span class="vars">$flv_header_frame_length</span><span>) { </span> </span></li>
<li><span> </span></li>
<li class="alt">
<span> </span><span class="func">fseek</span><span>(</span><span class="vars">$fp</span><span> , </span><span class="vars">$frame_size_data_length</span><span> - </span><span class="vars">$flv_header_frame_length</span><span>, SEEK_CUR);  </span>
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<li><span> </span></li>
<li class="alt"><span> } </span></li>
<li><span> </span></li>
<li class="alt">
<span> </span><span class="vars">$duration</span><span> = 0;  </span>
</li>
<li><span> </span></li>
<li class="alt">
<span> </span><span class="keyword">while</span><span> ((</span><span class="func">ftell</span><span>(</span><span class="vars">$fp</span><span>) + 1) < </span><span class="vars">$flv_data_length </span><span>) { </span></li><li><span> </span></li><li class="alt"><span> </span> <span class="vars">$this_tag_header</span><span> = </span><span class="func">fread</span><span>(</span><span class="vars">$fp</span><span>, 16);  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$data_length</span><span> = BigEndian2Int(</span><span class="func">substr</span><span>(</span><span class="vars">$this_tag_header</span><span>, 5, 3));  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$timestamp</span><span> = BigEndian2Int(</span><span class="func">substr</span><span>(</span><span class="vars">$this_tag_header</span><span>, 8, 3));  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="vars">$next_offset</span><span> = </span><span class="func">ftell</span><span>(</span><span class="vars">$fp</span><span>) - 1 + </span><span class="vars">$data_length</span> <span>;  </span></li><li><span> </span></li><li class="alt"><span> </span><span class="keyword">if</span><span> (</span><span class="vars">$timestamp</span><span> > </span><span class="vars">$duration</span><span>) { </span>
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<li><span> </span></li>
<li class="alt">
<span> </span><span class="vars">$duration</span><span> = </span><span class="vars">$timestamp</span> <span>;  </span>
</li>
<li><span> </span></li>
<li class="alt"><span> } </span></li>
<li><span> </span></li>
<li class="alt">
<span> </span><span class="func">fseek</span><span>(</span><span class="vars">$fp</span><span>, </span><span class="vars"> $next_offset</span><span>, SEEK_SET);  
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