I spent a very brief amount of time testing this - So far only two titles: World of Warcraft: Legion alpha and Black Desert Online I set Fraps to RGB Lossless recording and had Fraps split files every 4GB The first test was World of Warcraft: Legion, and the clip stats are as follows: Code: File size : 3.91 GiB Duration : 33s 567ms Bit rate : 999 Mbps Width : 1 920 pixels Height : 1 200 pixels Frame rate : 30.000 fps Bits/(Pixel*Frame) : 14.453 I ran it through StaxRip using the default settings for x264. The resulting file was as follows: Code: File size : 85.0 MiB Duration : 33s 567ms Bit rate : 21.2 Mbps Maximum bit rate : 28.5 Mbps Bits/(Pixel*Frame) : 0.307 The x264 encode time was 57 Seconds. Next, I simply switched StaxRip to use x265 for encoding - I still kept the defaults (Both quality settings for x264 and x265 are CRF22.) Code: File size : 67.4 MiB Duration : 33s 567ms Bit rate : 16.8 Mbps Maximum bit rate : 26.5 Mbps Bits/(Pixel*Frame) : 0.244 The x265 encode time was 1 Minute 52 Seconds ------------------ I'm not going to post the full stats of the Black Desert videos, but as a summary: World of Warcraft: Legion | 30fps, 1920x1200 resolution, 33 second video Fraps: 4GB x264: 84.9MB x265: 67.3MB Black Desert Online | 30fps, 1920x1080 resolution, 58 second video Fraps: 4GB x264: 114MB x265 75.5MB I tried playing the videos side by side - I had a very hard time discerning a quality difference between the two videos but from what I saw it seems that the x265 encoded video has a slightly "warmer" color to it. Regardless of what is actually "better" - the fact that the filesize is much lower for what essentially looks the same is outstanding. Downside is that you don't get Windows Explorer thumbnails for the x265 encoded files, and only VLC will play them.