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The videos were then suitable for viewing. For sizing, I upscaled the vertical x 2 to give a 720 x 512 image. By Choosing a different ‘IN’ point each time, starting at a new camera and then outputting a new uncompressed AVI file, within a couple of minutes I had 6 AVI files for each camera.įor the purpose of demonstrative video, I used the frame rate displayed in the original player of 1 FPS. This means that it will only output every 6th frame. In Video > Frame Rate, there is option to decimate the output. Obviously, the problem is that they are in camera order. Select files of type and chose Image Sequence. Select the first image of of the images extracted and then they load in sequentially. have to come back to that one!Īnyway, JPEGsnoop worked here and in 10mins I had a folder with over 20,000 jpegs! Dealing with all these and separating them up into Channels/Cameras could be a bit problematic but I have found that using Virtualdub is an easy method. Search for Scalpel in Linux repositories or use this GUI for Windows.īefore extracting all the images, I identified the recorded resolution was 720 x 256…. There are times when this automated tool doesn’t work and in these circumstances I usually lean on Scalpel to carve all the jpeg s manually. This little tool make it very easy to review the digital makeup of the file, the meta data and allows you to extract all the jpegs. There are a few tools to extract all the jpeg’s as files but one of the easiest is JPEGsnoop. By scanning through I could see that it was a file made up of separate images. DAT file in a Hex editor, ( HXD was used here), I can see that it has a jpeg header and then various pieces of meta-data before the image data itself. Identify timing issues and validate the times displayedīy viewing the. Identify a method to quickly deal with all 6 Channels of video in the fileĢ. Interestingly, the size of images being saved are 720 x 512 and not as displayed in the player.ġ. There is a function to save a snapshot, under the File option menu. The software is limited in terms of functionality with the ability to select camera/channel number by right clicking on the picture. The date and time information is displayed along the top of the image. The players video window is highly distorted, with a strange Display Aspect Ratio. DAT file is loaded, the first issue can be seen. The player is exported on the disk and autoruns if the feature is enabled in a modern PC. They were very popular and are still widely used. PAR file extension now commonly used by Dedicated Micros, as discussed here and here, the first Digisprite DVR’s exported their footage with.
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Quite an old format, but it highlights some handy tricks!īefore the.
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