mp4s cannot play on iOS devices from WordPress install


Hopefully someone out there has experienced this issue - we use WordPress Multisite to provide a Podcasting service to a university. We're trying to make the service more mobile friendly and have hit a snag with mp4 in iOS devices. Currently whenever we try to watch a mp4 (uploaded to the media library and attached to a post) on an iOS device we get an image of the play symbol that has been crossed out. Using the developer debugging console we get the 'tip'...'QuickTime BYTE_RANGE_ERROR_MESSAGE'. I have done a bit of research but can't work out what settings on the server I need to change - any ideas?

mp3s seem to work fine and when using an HTML5 media embedding plugin mp4s are still an issue.

Thanks in advance :slight_smile: