DLNA slow upload speed when playing 4k 75Mbps video



Hi guys,

I got a Sony Bravia XBR-55X900E, and tried playing the Sony 4K HDR Demo "Camp" video using Plex, but I checked the upload speed on my computer is only around 60Mbps, definitely not enough for a 75Mbps video, I also checked that Plex was in direct play mode, and my CPU was not stressed at all. Cuz my computer and router should handle this just fine, so I tried Twonky then, it's smooth, and the upload speed was always above 80Mbps. So is there a setting controlling the upload speed? I checked all the settings, basic or advanced, couldn't find anything about it. Or plex is just not well optimized for this.