27 of 29 people found the following review helpful
As a laptop screen mirror: Great picture, but stuttery video
, 24 Mar. 2014
This review is from: JUSTOP EZCast WiFi Display Screen Mirroring Dongle Miracast Adapter Full HD 1080P Media Pushing Network Streaming Sharing Client Push Media From Tablet / Phone /PC To Your TV Through WIFI, Support EZ Cast MiraCast DLNA uPnP and Airplay (Electronics)
When I purchased this, I took a chance as the few reviews available at the time explained how well this worked on a tablet/phone, but little about laptop use. My main intention was to use it to mirror my laptop display for watching online streaming services that depend on Media Hint, which otherwise I cannot watch on my Android TV stick. Unfortunately, it turns out that as a screen mirroring device, it is fairly limited in use, certainly not fit for stutter-free video, even with all the PC and device updates to the time of writing this review.
This review is based on using a laptop with an Intel Core i5 3320M (2.6-3.3GHz) CPU with Windows 8.1 and a Wireless-N 300Mbps Wi-Fi router. The laptop was in the same room as the dongle, about 3 metres apart in direct visible line of sight.
Unlike many other Miracast devices that depend on Intel’s WiDi or Windows 8.1, this device provides its own software to mirror the laptop display. Once the device is configured and screen mirroring is enabled, it gives the option of low quality or high quality, in 720p only based on several laptops I tried. In ‘High Quality’ mode, the picture is clear and sharp, just like using a HDMI cable. However, anything that moves stutters badly, so this mode is mainly suited for showing photos or a PowerPoint presentation. In ‘Low Quality’ mode, the image looks like a JPEG image, with faint noise around text. This mode makes animations and video look smoother, which is fine for watching TV shows, but the video stutters too much to watch heavy action, such as an action movie or playing back handheld video footage.
With Windows 8.1, the software gives an ‘Ezcast’ option. When this is enabled, the Windows 8.1 ‘Project’ option is used to mirror the display. In this mode, Windows gives the option to turn off the laptop display, in which case lets me increase the output resolution right up to 1920 x 1080 (1080p). When output at 1080p, video stutters too much to watch video, but still useful for showing photos in higher resolution on the big screen or for a sharper image with a PowerPoint presentation. When I lowered the resolution to 720p, video playback is much smoother than even the device’s own software utility, but noticeably drops frames with heavy action, such during a car-chase scene in a movie.
So unfortunately for my own use, I have gone back to using a HDMI cable as I find it quite irritating watching video that stutters intermittently. I have since given this to my parents who use who don't seem to mind the stuttering, especially when watching TV shows such as Deal or No Deal on 4oD.
I sure would like to know if this video stuttering is the case with all Miracast devices. I am fairly certain it is not a problem with my Wi-Fi as I have no problem streaming 1080p video over the network and the video tests in this review are based on me playing samples stored on the laptop.
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