This means that the video information (such as what codecs are used) is not stored at the beginning of the file. In our experience, video with bad meta data position might be slow to load in Flash engine (check some browser which doesn't play MP4 format in Flash - like Opera) and Firefox. Although Safary and iOS (iPAd, iPhone) may play it just fine. In general we recommend you to re-encode your video as per our instructions, but here are some quick tools: If you are using Mac, try Lillipot (just remember to rename the file back to .mp4 extension): http://www.qtbridge.com/lillipot/lillipot.html If you have Quick Time Pro, just open the video and in the Movie Properties -> Video Track -> Other Settings turn on the "Cache (hint)" - screenshot. If you are using Windows, try MP4 FastStart: http://www.datagoround.com/lab/ There are also server-side tools for fixing of this written in Python and there one for PHP, but it fails on videos bigger than the PHP memory limit. 7. I'm getting error about 'HTTP range requests'. Please check with your technical support if your web server supports HTTP range requests. Most of the modern web servers support this feature (Apache, Nginx, Lighttpd, Litespeed...). It's important for fast seeking in HTML5 video playback. Other possible cause is that you are using some membership plugin to protect downloading of your videos (Premise and others). While this might seem like a good solution, we don't recommend it as it increases the load of your server and it won't allow seeking in the videos. You can use Amazon S3 with privacy settings, just hit the link to read our illustrated guide. 8. Are there any known compatibility issues?. We heard about problems when using some fancy pro templates like OptimizePress (read below for fixing instructions) or Gantry framework. These templates often break the WordPress conventions (probably as they often try to add too many non-template functions, like video support built-in into the template). We can debug the issues for you, just head over to our website and order the pro support. Full list of conflicting plugins is available here: https://foliovision.com/player/compatibility 9. I'm using OptimizePress version 1 template. First click the "Check template" button on the pluging settings screen. It will likely report an issue like: It appears there are multiple Flowplayer scripts on your site, your videos might not be playing, please check. There might be some other plugin adding the script. Flowplayer script http://site.com/wp-content/themes/OptimizePress/js/flowplayer-3.2.4.min.js is old version and won't play. You need to get rid of this script. The problem with this template is that it includes that old Flowplayer library without using the proper WordPress function to add a new script (wp_enqueue_script). You need to go through the template and make sure the script is not loading. Typically it will be in any of the header.php files - including header-myheader.php, header-singleheader.php or similar files. There is also a workaround - on each page what is using one of the OptimizePress custom templates, check Launch Page & Sales Letter Options --> Video Options --> "Activate Video" and enter "<!-- FV Flowplayer -->" into Launch Page & Sales Letter Options --> Video Options --> "External Player Code" field. That way the template thinks the video is external and will not try to put in the Flowplayer library and the video will play. 10. I'm using OptimizePress version 2 template. FV Flowplayer will handle all the videos inserted by the Live Edit. 11. Does this plugin support Shoutcast?. Unfortunatelly HTML5 does not support live broadcasting. Please read about it here under "Flash. The good parts": http://flowplayer.org/docs/#flash 12. I get an error message like this when activating the plugin: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /wp-content/plugins/fv-wordpress-flowplayer/models/flowplayer.php on line 4. You need to use at least PHP 5, your site is probably still running on old PHP 4. 13. I get "Can't create temporary file for video analysis" in admin video checker. This temporary file is required as our plugin contains a video checker for admin users - it checks the video format and other information and warns you about potential issues why your video might not play for everybody. The error message means the WordPress media uploads directory (by default wp-content/uploads) is not writable by PHP. We use this standard WordPress path as it should work for nearly all the websites. Most of people use the standard WordPress Media Library, so this should really work. You can try to set the permissions of that folder to allow writing for everybody and see if that helps. If you are not sure, ask your web host support about what PHP permission model you use. 14. I installed the plugin, inserted the video, but it's not working - there is no control bar or only a gray box appears. Go to plugin Settings screen and hit "Check template" button. It will check if both jQuery library and Flowplayer JavaScript is loading properly. Also, check "I'm using OptimizePress template" question above. 15. Your player works just fine, but there are some weird display issues. Please check if these issues also appear when using the default WordPress template. There seems to be some sort of conflict between the Flowplayer CSS and your theme CSS. 16. Fullscreen is not working properly for me. Are you using some old lightbox plugin like http://www.4mj.it/slimbox-wordpress-plugin/ ? Or are you putting the video into Iframe? Also, the video should not be placed in an HTML element with lowered z-index. 17. How to make this plugin WPMU compatible?. Just copy the plugin into wp-content/plugins and then activate it on each blog where you want to use it. 18. Is there a way to force pre-buffering to load a chunk of the video before the splash screen appears?. This option is not available. With autobuffer, it means every visitor on every visit to your page will be downloading the video. This means that you use a lot more bandwidth than on demand. I know that I actually watch the video on only about 1/3 of the pages with video that I visit. That saves you money (no bandwidth overages) and means that people who do want to watch the video and other visitors to your site get faster performance. If you want to autobuffer, you can turn that on in the options (we turn it off by default and recommend that it stays off). 19. My videos are hosted with Amazon S3 service. How can I fill the details into shortcode?. Just enter the URL of your video hosted on Amazon S3 as the video source. 20. I would like to localize the play again button. Currently there is no support for other languages. 21. Where can I change the default directory for videos?. You can change this manually in the the models/flowplayer.php in the flowplayer_head function. It you use videos in widgets you might need to edit the function flowplayer_content in controller/frontend.php as well. Please be carefull when editing source codes.