CCTV Analysis Services

CCTV Analysis

Our core service is CCTV analysis. Demux works with the latest tools and equipment to ensure your video and audio material is used to its maximum potential in your case preparation and when presenting it in court.


At various stages of an investigation it often becomes necessary to present the video evidence – e.g.: for interview purposes, conferences or at trial. There are often multiple sources of video evidence and these are often of differing formats. It is very useful to have a compilation of all the relevant clips created in a format that can be viewed at the relevant venue. DVD has proven to be the format of choice due to its ease of access and durability.

Editing of Video Interviews

Many interviews are now video recorded and this brings an additional problem of editing the video to match the transcript redactions. Often the extent of redaction is only agreed between the parties on the first day of the hearing, leaving someone with the job of rapidly accommodating the changes and acquiring an edited version of the video or DVD interview record. At Demux, we have personally experienced this scenario and will endeavour to carry out the necessary work for start of court the following day.


Problem. Many CCTV systems are still using video tape to store images from multiple cameras. When these tapes are replayed on standard video equipment the viewer is confronted by an unintelligible series of flashing images that can only be viewed one at a time by pausing the video and stepping forward a frame at a time until another image from the camera of interest comes round. This will ultimately degrade the tape, causing loss of picture quality and damage to the equipment. In addition you are likely to be trying to view a poor quality copy of the original recording. Traditional demultiplexing only decodes one camera at a time so a tape from a 16 camera system would take a minimum of 48 hours to fully decode. This also means that your video has to be played once for each camera that you wish to decode which increases the chances of damage and loss of image quality.

Solution. By using specialist tools we can decode the images from individual cameras and convert them into a format that can be viewed easily on standard video equipment. With Express De-multiplexing we can decode up to 16 cameras simultaneously and will provide you with a video of each camera’s images plus a full working copy of your master. If the tape is of a typical 3 hour length Express De-multiplexing offers a saving of at least 45 working hours and your tape is played only once, thus reducing the risk of damage.
If possible we prefer to work with the original material to carry out this process which ensures that the resultant tapes are of the best possible quality.

Digital CCTV

Problem. Any one or a combination of,
- unable to play image files
- unable to capture still images
- unable to create a compilation from different cameras or different systems
- unable to see detail required

Solution. We have access to an extensive database of software players to enable viewing of the images. See also Still Images, Compilations and Clarification.

Multimedia Discs

If you have evidence in the form of still photographs, video, audio, documents, maps etc we can compile a multimedia disc containing all of the items which is accessible through menu selections.

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