I downloaded a sample mkv file to test on my new HDPro but notice serious lagging.

General
Complete name : C:\planet_earth[1].sample.x264.mkv
Format : Matroska
File size : 96.1 MiB
Duration : 23s 46ms
Overall bit rate : 35.0 Mbps
Movie name : Avidemux
Writing application : Lavf51.12.1
Writing library : Lavf51.12.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings, CABAC : Yes
Format settings, ReFrames : 16 frames
Muxing mode : Container profile=Unknown@5.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 23s 42ms
Bit rate : 33.8 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.680
Stream size : 92.9 MiB (97%)

Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Codec ID : A_AC3
Duration : 23s 46ms
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Resolution : 16 bits
Video delay : -83ms
Stream size : 1.23 MiB (1%)

Any hope for this new V3 SDK?

High reframe or high bit rate? I have another movie having this amount of reframe and 10mbps of bit rate with no issue. But this is with 33.8 Mbps of bit rate