摘要
ASF文件作为当前主要的流媒体格式之一,给人们的生活带来极大的方便。但同时受到广告泛滥、内容模糊,不能分离精彩片段的严重制约,必须开发一种对其进行编辑的软件,既节省时间,又可以反复观看经典内容。并且通过使用WMF SDK提供的生成器、读取器、编辑器可以忽略ASF文件底层的实现细节,提高开发效率。针对ASF文件切割中存在的问题,对切割精度、绕开生成器的压缩编码过程、属性编辑等方面进行了研究,并实现了对ASF文件的切割。
The advanced systems format （ASF） is the file format used by Windows media. Audio and/or Video content compressed with a wide variety of codes can be stored in an ASF file and played hack with the Windows media player. But nowadays, Some ASF Video files contain many advertisements, some frames are illegible and it is hard to separate interesting content from other frames. So it is necessary to develop software which can edit ASF file effectively, enable interesting content played repeatedly. It can facilitate the development of the software by using reader object,writer object,editor object provided by WMF SDK, in spite of the details of ASF files. Points out the problems in the process of ASF file dismemberment. At the same time, dismemberment precision, decode/encode technology avoiding the writer object,properties revision are also studied. Finally software is developed which realized the dismemberment of ASF files.
出处
《计算机技术与发展》
2007年第7期175-177,182,共4页
Computer Technology and Development
基金
国家发改委科学研究计划项目(CNGI-04-15-3A)
关键词
流媒体
头对象
读取器
生成器
数字版权管理
streaming media
header object
reader object
writer object
digital rights management
