Forensic analysis of video file formats

Video file format standards define only a limited number of mandatory features and leave room for interpretation. Design decisions of device manufacturers and software vendors are thus a fruitful resource for forensic video authentication. This paper explores AVI and MP4-like video streams of mobile phones and digital cameras in detail. We use customized parsers to extract all file format structures of videos from overall 19 digital camera models, 14 mobile phone models, and 6 video editing toolboxes. We report considerable differences in the choice of container formats, audio and video compression algorithms, acquisition parameters, and internal file structure. In combination, such characteristics can help to authenticate digital video files in forensic settings by distinguishing between original and post-processed videos, verifying the purported source of a file, or identifying the true acquisition device model or the processing software used for video processing.     

Setting the stage: Arnold Schwarzenegger and video games prepare for battle in the United States Supreme Court

Video games often feature a character that evolves into an iconic superhero. In a strange twist of fate, the video game medium will have the opportunity to become a superhero itself. The recording, comic book, and movie industries have rallied around video games as the case of Arnold Schwarzenegger vs. Entertainment Merchants Association and Entertainment Software Association reaches the Supreme Court of the United States. The case concerns a 2005 California ban on the sale of violent video games to minors. The law was later overturned by the District Court and the 9th Circuit Court on appeal. At issue is whether the law violates the First Amendment of the Constitution. Do video games deserve the full protection of the Constitution as a legitimate form of speech, or should it be limited due to its alleged effects on the psychological well-being of minors? This Article will look at the impact this case may have when it reaches the Supreme Court, an analysis of the issues that will be argued, and the history of legislation involving violent video games.     

视频图像侦查中视频信息内容分析初探

视频信息内容分析是视频图像侦查的重要内容之一。围绕案件相关要素来搜寻和发现涉案的视频图像资料,能为视频信息内容分析提供良好的基础。然后紧密围绕涉案人员图像、涉案车辆图像、涉案物品图像进行分析,并将获取的相关信息应用与侦查实践。