使用FFMPEG的PHP HTML5兼容MP4视频

echo "conversion exercise started...<br/><br/>";

/* looping through all files in the directory */
if ($handle = opendir('assets/uploaded_videos')) {
    while (false !== ($entry = readdir($handle))) {

        /* filtering the desired extensions */
        if ($entry != "." && $entry != ".." && in_array(substr($entry,strrpos($entry,'.')),array(".wmv",".mpg",".mpeg",".flv",".ogg",".mp4")))
        {
            $filename = substr($entry,'.'));

            //$command = "ffmpeg -i assets/uploaded_videos/$entry -vcodec libx264 assetss/videos/$filename.mp4";

            $command = "ffmpeg -i assets/uploaded_videos/$entry -vcodec mpeg4 -acodec libfaac files/videos/$filename.mp4";

            echo $command."<br />";

            shell_exec($command."> /dev/null 2>/dev/null &");
        }
    }
    closedir($handle);
}

我已将播放器嵌入到视图文件中,如下所示：

<video width="350" poster="<?php echo $first_video['thumb_path'];?>" controls>
    <source src="<?php echo $first_video['video_path']; ?>" />
    <span id="silverlight_player_for_fallback"></span>
</video>

现在,当我在IE10中运行时,播放器会给我无效的源错误.我对libx264和mpeg4 MP4编解码器都有这个问题.

任何想法都出错了？

更新

按照伊恩的指示,我终于开始工作了.我在libx264中使用了baseline-level3配置文件.你可以提供额外的参数但我猜配置文件是关键！我试验了几个配置文件并观察到vimeo和youtube上的所有HTML5视频都使用此基线L3配置文件.

任何与MP4斗争的人都可以考虑使用以下命令进行转换：

/* following command converted all my uploaded *.wmv files to mp4 */
$command = "ffmpeg -i files/uploaded_videos/$entry -vcodec libx264 -profile:v baseline -level 3 files/videos/$filename.mp4";