labelsqert.blogg.se - Ffmpegx datamosh

#Ffmpegx datamosh how to
#Ffmpegx datamosh full
#Ffmpegx datamosh pro
#Ffmpegx datamosh software
#Ffmpegx datamosh code

For each script, there will two entries, one of which is suffixed by "14" (for example, Datamosh and Datamosh14). Several entries will be added in the Tools -> Scripting submenu in Vegas. (If the folder does not exist, create it.) 1.3.0: Added Automator (randomizes video effects)ĭownload the latest release (the windows64.zip file) and unpack it into your C:\Users\\Documents\Vegas Script Menu folder.1.4.0: Added Datamix (datamosh: apply a clip P-frames on another clip I-frame).

#Ffmpegx datamosh pro

I could only find one single datamoshing tool that is able to run on Linux: I was reading about datamoshing and fell in love with it.A pack of Sony/MAGIX Vegas Pro scripts for YTP (datamoshing, multilayering.

#Ffmpegx datamosh software

It is basically a Python script that wraps around the famous ffmpeg, a vast software tool suite of libraries and programs for handling video, audio, and other multimedia files and streams. The Python script also has the algorithm to edit i-frames and p-frames.įfmpeg is used for the video format conversion. The Python tool already needs some maintenance (found some broken stuff), and I thought it would be a nice exercise (C++, Python) to refactor the “ you-can-datamosh-on-linux ” as an openFrameworks addon. There’s no decent datamoshing addon written yet, and I think this could be interesting for a lot of people in the oF community. In plain English, datamoshing is an umbrella term for an array of cool effects you get by glitching, altering, or otherwise breaking the fundamental structure of video files’ data. We datamosh because we can, and because it looks really cool. What’s happening in the Python datamosh tool is that first the video file is converted to AVI format which is glitch friendly as it sort-of doesn’t care if you delete frames from the middle willy-nilly (mp4 gets real mad if you delete stuff in a video file). There are 2 types of frames that we’re dealing with: i-frames and p-frames.

#Ffmpegx datamosh full

I-frames (aka key frames) give a full frame’s worth of information while p-frames are used to calculate the difference from frame to frame and avoid storing lots of redundant frame information. A video can be entirely i-frames but the file size is much larger than setting an i-frame every 10 or 20 frames and making the rest p-frames. The first i-frame is the only one that’s required and after that we use p-frames to calculate from frame to frame. The encoding algorithm then makes inter-frame calculations and sometimes interesting effects happen. Initially datamoshing was just deleting the extra i-frames maybe smooshing some p-frames in from another video and seeing what you got. However the glitchers eventually grew bored of this and discovered if they repeated p-frames that the calculations would cause a blooming effect and the results were real rowdy. So that’s what the repeat_p_frames variable does and that’s why “it sounds like a dying printer”- Because we’re repeating p-frames the video length may get much longer. At ((25fps - 1 i-frame)) * 15 or (24 * 15) a single second of 24 frames turns into 360 frames which is (360 frames / 25 fps) = 14.4 seconds.Īfter we’re done mucking around with i-frames and p-frames the results are fed to ffmpeg which locks in the glitches and makes a twitter-ready video. In order to achieve such goal, the following questions need to be answered: I need to write a ofxDataMosh oF/C++ class that opens an AVI video file and edits its i-frames and p-frames to generate the effect.

#Ffmpegx datamosh how to

How to use FFmpeg/libavcodec to open AVI video file.

How to use FFmpeg/libavcodec to manipulate video frames in such a way that we can distinguish and edit video frames.

How to use FFmpeg/libavcodec to save AVI video files.

Looking at “ you-can-datamosh-on-linux ” and the ofxAvCodec gave me some good insights on how to do this. When writing ofxDataMosh we need to keep in mind how the user will invoke it (ofSetup(), ofUpdate(), ofDraw()). The “ you-can-datamosh-on-linux ” tool only writes a new video file to disk, which is a decent start.

Initialize AVI video files (converted_input.avi + datamoshed_output.avi).īut an ideal goal would be the possibility of playing the actual glitched video on the screen from an ofApp.

if not i_frame_yet or current time isn’t effect.

I-frames are identified when frame = 0x0001B0.

On the other hand, p-frames are identified when frame = 0x0001B6.

#Ffmpegx datamosh code

I created a Bitbucket Git repo with my personal account so we can push some code The end of a frame is identified by0x30306463, which is used to split the single hex stream from input file into a structured list of separated frames.

The “ you-can-datamosh-on-linux ” is released unlicensed. I’m using MIT (from the template) to keep things as free as possible on ofxDataMosh. Once we have something stable we could move it to GitHub to make it popular.