I have built a pd abstraction that glitches .MOV/.MP4 files. This is the result of a long process that involved the study and understanding of the way .MOV files work and their atom structure. Having learned a lot while developping my jpeg and mp3 glitchers, I have been willing to transpose this knowledge to the video realm. To make a long story short, my abstraction locates the mdat atom of the file, reads its length and glitches it in a user-controlable way, while leaving the rest of the filestructure untouched, allowing various degrees of glitchiness with very few unreadable files.
Of course, the bigger the files, he longer the processing time. I have able to glitch a 250 meg MP4 (40 minutes of video) in a bout 1 minute on a macbook pro running under OS 10.10 with the latest stable version of PD extended. On slower computers, processing may take up to 5/6 minutes. Also note that results will vary according to the codec used for compression. I have been able to get good results with H264, but they should all work. As usual with glitch, results will also vary according to the player you use. I personnaly prefer VLC . Some files may appear broken on some players and play just fine on others... Usually, if a file breaks in the process, just tweak the settings a bit to get less glitched file, it should work eventually. This is particulary thrue with small files.
Here's a bunch of stills I took from one processed video:
Here's the pd extend abstraction:
It's a graph on parent abstraction, so the idea is to open it like an object in a blank canvas.
And here's the standalone version for mac:
Your comments are welcome!