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    October 12

    一次关于主流视频编码压缩率的试验和探讨(Xvid,Wmv,Mov,H.264)

    这几天下了一大批孙燕姿的高清MV,都是很经典的那种,想刻成DVD收藏起来。可惜源文件都是Mpge2压制的VOB文件,一个3,4分钟MV体积就达到两三百兆,实在是难以收到一个DVD中。于是对视频重新编码,减小体积的工作就显得很有必要了。

    原视频信息:

    然而,由于之前对不同的视频编码都没有仔细的研究过,所以在选择以何种视频编码进行压制的时候就有点不知所措了。于是我决定进行一次实验,来弄清楚目前各主流视频编码在同等品质下的压缩率。

    实验平台:狸窝全能视频转换器

    品质选择:中等

    实验对象:孙燕姿.-.[我要的幸福].MV.(DVDRip).vob

    原文件大小:228M

    实验过程:

    实验格式一:Xvid编码

    目标文件大小:51.1M

    编码时间:10min

    前后文件压缩比:4.46:1

    实验格式二:mov编码

    目标文件大小:72.8M

    编码时间:12min

    前后文件压缩比:3.13:1

    实验格式三:H.264编码

    目标文件大小:46.9M

    编码时间:7min

    前后文件压缩比:4.86:1

    实验格式四:wmv编码

    目标文件大小:46.9M

    编码时间:4.5min

    前后文件压缩比:4.86:1

    实验结论:

    明显可以看出前两种编码的压缩率要落后于后两者。

    WMV和H.264编码虽然在压缩率上不相上下,然而就编码速度,和解码的CPU占有率而言,wmv具有明显的优势。

    希望此次试验结果能给大家在需要进行视频压制时提供一个参考。

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