More information on frame types can be found here. In most cases this means many P-frames with I-frames interspersed at regular intervals and where drastic visual changes in the video occur. When a video is encoded, or compressed, a combination of these types of frames are used.
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Instead of storing full pictures these P-frames and B-frames contain data describing only the differences in the picture from the preceding frame, and/or from the next frame, this data is much smaller compared to storing the entire picture - especially in videos where there isn’t much movement. To do this most formats don’t store the entire image for each frame.įrames which store an entire picture are called I-frames (Intra-coded), and can be displayed without any additional information.įrames which don’t contain the entire picture require information from other frames in order to be displayed, either previous or subsequent frames, these frames are called P-frames (Predicted) and B-frames (Bi-predictive). Modern compressed video files have very complex methods of reducing the amount of storage or bandwidth needed to display the video. Regardless of the application of the term, datamoshing videos can be done quite easily with free, cross-platform tools. In some cases the term datamoshing is used to describe this process applied to any type of media file - I like to think it applies solely to video since it results in moving images being moshed together. Some of these types of automation could be accomplished through the usage of a programming framework, or scripting language, but automating at the user interface level can remove a lot of overhead and restrictions.Īutohotkey automate automation avidemux databending datamoshing glitch hotkey how howto macro scripting tutorial videoĭatamoshing is the process of manipulating the data of media files in order to achieve visual or auditory effects when the file is decoded.
Similarly one could experiment with automating photo editing processes by scripting with a program like AutoHotkey. These types of scripts could also be used to automate key strokes while hex editing images, consider a script which would move a certain number of characters across and then insert a character - that could glitch out an image quite nicely. The script will send the appropriate key strokes to remove the next 10 I-frames while you pop out for a break. Load AutoHotkey with the script below and then when it comes time to remove I-frames in Avidemux simply focus the slider below the video and press Control+F to trigger the AutoHotkey script. The video above was datamoshed using this automation script.
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The following script for AutoHotkey automates I-frame removal in Avidemux, normally a manual process described in this tutorial.
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For Windows users AutoHotkey is free, open-source macro-creation and automation software that can handle some of the repetitive tasks involved in datamoshing. Datamoshing videos can be a time-consuming process, automation can help.
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