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视频素材属性：
General
Complete name : 国外素材网\wzb\118-kmyc珍贵历史纪录片.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom (isom/iso2/avc1/mp41)
Duration : 2 min 11 s
Overall bit rate mode : Variable
Overall bit rate : 3 256 kb/s
Video
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2 min 11 s
Bit rate : 3 126 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.060