I have a lag in the preview window, frames are skipped. Already reduced to 1/4 all the same often such a problem arises. Before importing to Adobe Premiere he converted to mp4 h264. Video: Image size: 1920 x 1080 60 frames / s, bitrate 4 172 kb / s. Preview: by frame size, quality 1/4 PC parameters: intel core i7 - 4700HQ 2.4GHz, 12 Gb of RAM, Winchester on which the video is at 5400 rpm / s, Windows is on the SSD, Nvidia Geforce 850M video card. Load during playback when a hangup occurs. If you look at the data transfer rate on the disk, then the speed of 1MB / s for HDD is garbage. Disk 0 - HDD, Disk 1 - SSD Load on integrated and additional video card
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