我经常用凤凰移动台手机版看视频,发现他们做的很好,视频在手机上看很清楚,担心流量问题,后来下载了一个他们的视频,发现一个3分50秒的视频文件,MP4格式,大小才8M,太惊人了
用MediaInfo看了一下视频的属性如下:
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 8.24 MiB
Duration : 3mn 50s
Overall bit rate mode : Variable
Overall bit rate : 299 Kbps
Encoded date : UTC 2011-12-05 00:46:22
Tagged date : UTC 2011-12-05 00:46:22
Writing application : Smart Genius Codec 1.1.11.129
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L2.1
Format settings, CABAC : No
Format settings, ReFrames : 1 frame
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 3mn 50s
Bit rate : 265 Kbps
Width : 480 pixels
Height : 360 pixels
Display aspect ratio : 4:3
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) : 0.061
Stream size : 7.28 MiB (88%)
Encoded date : UTC 2011-12-05 00:46:22
Tagged date : UTC 2011-12-05 00:46:22
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : HE-AACv2 / HE-AAC / LC
Codec ID : 40
Duration : 3mn 50s
Bit rate mode : Variable
Bit rate : 32.0 Kbps
Channel(s) : 2 channels / 1 channel / 1 channel
Channel positions : Front: L R / Front: C / Front: C
Sampling rate : 48.0 KHz / 48.0 KHz / 24.0 KHz
Compression mode : Lossy
Stream size : 902 KiB (11%)
Encoded date : UTC 2011-12-05 00:46:22
Tagged date : UTC 2011-12-05 00:46:22
有没有高手知道是怎么能压缩成这样的视频?我也想压电影放手机里看
Writing application : Smart Genius Codec 1.1.11.129
这个是什么意思,从哪里可以找到这样的东东?
视频样版下载地址如下:
http://115.com/file/aq1a04qf#
db60b564-2a7e-4fc1-93b3-5e6116146c71280.mp4