This brief (approx. 9min.) introduction into the world of digital video evidence is intended to provide law enforcement professionals with a better understanding of the basic concepts and related issues.  It was geared towards first responders, who in many cases are the ones initially seizing video evidence.

FFmpeg is a great tool to have in your toolbox if you’re a multimedia geek. If you live mostly in the world of Microsoft Windows and have dozens, hundreds, or thousands of files to process though they lose a little luster. Sure, there are tons of free applications built on FFmpeg that provide some limited batch processing capability, but usually they're just that; limited. Here’s a simple way you can process hundreds of files from one format to another, using the full capability of your FFmpeg install.

First, which scripting languages do you know? Great, we won’t need those, but that’s really cool that you know them. Given that you’re reading this, I’m going to assume you can write plain text into a text file. I don’t like to assume anything, but I’m feeling pretty good about that one. Alright, let’s get started.

Turns out I may just know a thing or two about Mass Video Evidence Collection & Processing.  Who knew?

I have worked several cases that were comprised of thousands of hours of video evidence collected from dozens of sources, including the Vancouver Stanley Cup riots.

Forensic Video Analysts from around the world were brought to Indianapolis to work together, and although I wasn't there, I was responsible for supporting the infrastructure and solving the DME workflow issues that couldn't be resolved efficiently on-site.

I just returned from another great week of DME training at our office out on the east coast last week. One of the themes I've come to recognize through my travels teaching the fundamentals of DME Processing, is that even some of the most seasoned technicians and analysts don’t really understand the significance of hardware to accurate and proper processing of DME. It’s completely understandable why, given the marketing messages of some DME vendors, the fact that we're all constantly asked to do more with less, and the rate of related technological advancements.

Photoshop has grown into a very powerful and capable platform for working with video since the capability was introduced in CS3 Extended. I’ve dabbled with it over the years, but despite its impressive capabilities I always end up going with what I know best, relying on other video editing tools for most video related tasks. Well, this old dog is always trying to learn new tricks that improve efficiencies in my various personal and professional workflows, so I’ve been making an effort to explore Photoshop’s video capabilities more often.

Medical experts, accident reconstruction experts, and other types of experts are frequently asked to interpret data from images that were obtained from video evidence. When these experts have no training or background in processing multimedia evidence, and/or make no effort to consult someone who does, bad things generally happen. Really bad things, like having all of their evidence thrown out of court, for one.

"Who designed this user interface, Stevie Wonder?" Actual statement from a LE technician and point well taken when it comes to proprietary DCCTV players. They're often horribly designed, and like all multimedia players/editors/tools regardless of who makes them, they are time & resource dependent (e.g. hardware resources, drivers, frameworks, codecs, etc.).

The Technical Support Working Group (TSWG) recently made their flip-book "Best Practices for the Retrieval of Video Evidence from DCCTV Systems" available electronically as a PDF file.  Visit the URL below to access the PDF and other TSWG resources:

http://www.tswg.gov/subgroups/isf/electronic-evidence/products.html

Until about two years ago, it wasn't that often that I’d encounter Variable Frame Rate (VFR) video evidence, unless of course the case included video recorded by mobile phones. Times, they are a changing my friend.

DVR/NVR manufacturers are leveraging the advantages of VFR more often these days. And why shouldn't they be, especially when we’re seeing even the high-end professional video recording equipment start to use VFR more frequently. Throw in the want/need to get to Ultra HD before the next guy, and suddenly you've got a decent argument for VFR.

Zdenek Kalal’s Predator object-tracking software is almost uncanny. Show anything to its all-seeing camera eye, and it will quickly learn to recognize it and then track it, whether it fades into the distance, hides amongst other similar objects or — in the case of faces turns sideways.

Full Story

Need to download a web video from YouTube, Facebook, etc.? Here are two Freeware tools that can help, one of which you likely already have. ?

Let's make it a great Friday, my friends.