A 90-minute, standard-definition AVI movie began streaming in under 20 seconds, while a 4K MKV of similar length required several minutes of preparation before playback commenced, including extra time to process embedded subtitles, which can be bypassed when not needed. While QuickTime-compatible videos (including MP4) start playing immediately with little CPU impact, non-native formats require buffering (referred to as “presegmenting media for deployment”), which is entirely dependent upon file size, resolution, and your Mac. Naturally, real-time transcoding tends to be quite processor intensive. You can also import subtitles, as well as play embedded or external audio tracks in sync with the video. If I airplay just the sound to either ATV, everything works fine. All sound starts late, stays lagging behind, and stops late after the mirroring ends. That’s because the app does all the heavy lifting by transcoding in real time when needed, complete with optional subtitles where available in your chosen font, color, and size. When AirPlay mirroring my MacBook Pro or iPhone screen to the 5th Gen ATV, I do get a good picture with the projector and the sound does play through the speakers, but always about 4-5 seconds late. With JustStream, delivering video and audio to any screen in the house is a snap, even with files in non-native formats like AVI or MKV. The real convenience of JustStream comes in streaming one or more video files to a TV, even if they’re not native Mac formats. This is great for folks like me who have a home office at one end of the house and a big, beautiful 75-inch television in the living room, making wired connectivity less practical.
Streaming videoĪ more compelling JustStream feature is the ability to wirelessly stream video files to another display. The cursor and mouse clicks can be disabled, while output resolution can be manually adjusted to 1080p or 720p HD. Unlike AirPlay, there are a few mirroring options available.
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