Potplayer播放变5，拖动卡，什么原因呢？
好不容易用了十多个小时，无数次暂停、开始，才下好《变形金刚5》，但是播放时，拖动会卡5秒左右。虽然文件大些（21.7G），视频码率高些（1.5Mbps），但是播放和拖动时，CPU和内存占用量都超低的。
但是播放没有重编码的《变形金刚4》，文件比它还大（26G），视频码率比它还高（32Mbps），拖动都超级流畅，一点都不卡。
是播放器设置问题，还是重编码制作问题？还是下载问题？
看了下，播放所有重编码1080P拖动都会卡，而微冲编码的就非常流畅。不知道是什么原因。
以变4参数为例：
重编码1080P（拖动卡）：
General
Unique ID : 204493047421550273378763419833766833682 (0x99D7EDA801814AAA90BE37480670EE12)
Complete name : L:\蓝光高清电影\经典片\变形金刚4\变形金刚4.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 17.5 GiB
Duration : 2 h 45 min
Overall bit rate : 15.1 Mb/s
Encoded date : UTC 2014-09-19 15:33:16
Writing application : mkvmerge v6.8.0 ('Theme for Great Cities') 64bit built on Mar2 2014 21:34:26
Writing library : libebml v1.3.0 + libmatroska v1.4.1
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, RefFrames : 5 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2 h 45 min
Bit rate : 14.5 Mb/s
Width : 1 920 pixels
Height : 800 pixels
Display aspect ratio : 2.40:1
Frame rate mode : Constant
Frame rate : 23.976 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.394
Stream size : 16.4 GiB (94%)
Writing library : x264 core 142 r2431 ac76440
Encoding settings : cabac=1 / ref=5 / deblock=1:-3:-3 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=1.05:0.10 / mixed_ref=1 / me_range=32 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=18 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=6 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc=2pass / mbtree=0 / bitrate=14500 / ratetol=1.0 / qcomp=0.70 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / pb_ratio=1.30 / aq=2:0.80
Language : English
Default : Yes
Forced : No
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2 h 45 min
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 756 MiB (4%)
Title : dd5.1 640k eng
Language : English
Service kind : Complete Main
Default : Yes
Forced : No
未重编码1080P拖动流畅：
General
Unique ID : 174675352033736103756750461805303420608 (0x83693FC533BD94289A989F8ED84BD6C0)
Complete name : L:\蓝光高清电影\经典片\变形金刚4_IMAX\变形金刚4_IMAX.mkv
Format : Matroska
Format version : Version 4 / Version 2
File size : 26.1 GiB
Duration : 2 h 45 min
Overall bit rate mode : Variable
Overall bit rate : 22.6 Mb/s
Encoded date : UTC 2014-09-19 03:50:11
Writing application : mkvmerge v6.8.0 ('Theme for Great Cities') 64bit built on Mar2 2014 21:34:26
Writing library : libebml v1.3.0 + libmatroska v1.4.1
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, RefFrames : 3 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 2 h 45 min
Bit rate mode : Variable
Maximum bit rate : 35.0 Mb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Default : No
Forced : No
Audio #1
ID : 2
Format : TrueHD
Format profile : TrueHD+Atmos / TrueHD
Codec ID : A_TRUEHD
Bit rate mode : Variable
Maximum bit rate : 7 662 kb/s
Channel(s) : Object Based / 8 channels
Channel positions : Object Based / Front: L C R, Side: L R, Back: L R, LFE
Sampling rate :/ 48.0 kHz
Frame rate : 1 200.000 FPS (40 SPF)
Compression mode : Lossless
Title : TrueHD 7.1 eng
Language : English
Default : Yes
Forced : No
Audio #2
ID : 3
Format : AC-3
Format/Info : Audio Coding 3
Format settings, Endianness : Big
Codec ID : A_AC3
Duration : 2 h 45 min
Bit rate mode : Constant
Bit rate : 640 kb/s
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 kHz
Frame rate : 31.250 FPS (1536 SPF)
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 756 MiB (3%)
Title : dd5.1 640k eng
Language : English
Service kind : Complete Main
Default : No
Forced : No
你这个是普通的设置 没有调用GPU 加速用的商城CPU或者是软件
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