Archivio mensile 29 October 2018

Katzenjammer del 28 ottobre 2018

Cannabis legale in canada e il muschio, google abbandona Berlino, Microplastiche, sale e riscaldamento globale. Musica? si anche quella! Katzenjammer del 28 ottobre 2018.

  1. I’m a Liar – Gang Of Four
  2. HD Blue – Daniele Celona
  3. Santamaria – Canova
  4. Suzy – Caravan Palace
  5. Looking for the Rain – Unkle Reconstruction – UNKLE
  6. Pure Morning – Placebo
  7. Mecca – Wild Beasts
  8. Inertia Creeps – Massive Attack
  9. Like Mary – The Dream Syndicate
  10. This Mess We’re In – PJ Harvey
  11. Pretty Fly (For A White Guy) – The Offspring
  12. Spaceman – Babylon Zoo
  13. The World Is Not Enough – Garbage
  14. Love Leaks – TT
  15. I Need Some Sleep – Eels
  16. Slow Talkin’ – Haley Heynderickx Max García Conover
  17. Domeniche di agosto – Delta V
  18. Dizzy – Neuman
  19. Il Sangue Di Giuda – Afterhours

Katzenjammer del 21 ottobre 2018

Ospite di Katzenjammer Sarah Carlet di Emerging Talents per parlare di fotografia, musica e del concorso fotografico.

(foto di © Alexandra Lethbridge_The Vow, from the series, Other Ways of Knowing 2016 )

  1. Tricks – Sophie Hunger
  2. Roma maledetta – Il Muro Del Canto
  3. Photographic – Depeche Mode
  4. We Are the Chemicals – Blancmange
  5. The Boat is in the Barn – Grandaddy
  6. A design of Life – Manic Street Preachers
  7. The killing moon – Echo & the bunnymen
  8. Imagine – A perfect circl
  9. Numb – U2
  10. Nobody’s Wife – Anouk
  11. Lords of the Boards – Guano Apes
  12. Piove, finalmente piove – Giorgio Canali Rossofuoco
  13. Falling Rain and Light – Moby
  14. Mono – Zero 7 Hidden
  15. Spaziale – EDDA
  16. Has Ended – Thom Yorke
  17. Making Plans For Nigel – XTC

How to remove grid in video using Ffmpeg

During my life I was also a camera operator during a concert. There were a concert in the Radio I’ve collaborated for and I was with the camera during the concert. 

We had 3 camera, 2 fixed and I had the mobile one. Unfortunately during the recording, the director didn’t catch the fact the my camera sent the grid to the video mixer… this means that, at the end, all my shoots are affected with this GRID effect in the video:

It was a real mess. And we didn’t record each camera shoot.. so there were no way to remove my part or other fast-fix. But we could, at least, try to fix it in post production. Lucky for us, there is a plugin in Ffmpeg that can do what we need:

  1. Remove the grid that is in a fixed position
  2. Replace the pixel for each frame, with the most logic pixel (an average of the pixels surrounding)

The plugin is delogo. Here there is the documentation for delogo plugin . The plugin is intended for removal of video logo (suppress a TV station logo by a simple interpolation of the surrounding pixels) and can do what we exactly need. Due to the gird nature itself, first of all we need to find the positions of each line. Video is 1080×1920 . grid lines are 3 pixel width and so we can use multiple filter, each one to remove a line:

  1. ffmpeg -i input.mp4 -vf delogo=x=635:y=1:w=3:h=1078 -c:a copy output1.mp4
  2. ffmpeg -ioutput1.mp4 -vf delogo=x=1278:y=1:w=3:h=1078 -c:a copy output2.mp4
  3. ffmpeg -ioutput2.mp4 -vf delogo=x=1:y=360:w=1918:h=3 -c:a copy output3.mp4
  4. ffmpeg -ioutput3.mp4 -vf delogo=x=1:y=720:w=1918:h=3 -c:a copy final-output.mp4

Where each time the output of a filtering is then pass to the next filter. This is not very efficient and Ffmpeg has a better method to link a chain of filters with the use of filter_complex plugin (filter_complex documentation). You can also see this post as an example. At the end, the final command is:

 

ffmpeg -i input.mp4 -filter_complex “[0:v]delogo=x=635:y=1:w=3:h=1078[a];[a]delogo=x=1278:y=1:w=3:h=1078[b];[b]delogo=x=1:y=360:w=1918:h=3[c];[c]delogo=x=1:y=720:w= 1918:h=3[d]” -map [d] -c:a copy output.mp4

 

This is the input file

And this is the final result

Awesome! If you think that Ffmpeg is a free software. 

Katzenjammer del 14 ottobre 2018.

La soyuz, i suoi problemini, il costo del cybercrimine, i drammi di uno speaker radiofonico e le canzoni vecchie e nuove.

  1. Above Us – The KVB
  2. Lady Lie – Rainbow Kitten Surprise
  3. La Verità (feat. Davide Toffolo) – Punkreas Davide Toffolo
  4. Il re di Lampedusa – Filippo Gatti
  5. Balena – Elettrojoyce
  6. Lub Dub – A Toys Orchestra
  7. My Children – Protomartyr
  8. L’incubo (feat. Willie Peyote) – Subsonica Willie Peyote
  9. I Cani – Willie Peyote
  10. Scar Tissue – Red Hot Chili Peppers
  11. Why – Annie Lennox
  12. Big Empty – Stone Temple Pilots
  13. Lucy Mongoosey – !!!
  14. Games Without Frontiers – Arcade Fire
  15. Sunflower – Movie Version – Shannon Purser
  16. Shallow – Lady Gaga Bradley Cooper
  17. Aeronaut – Billy Corgan
  18. The Sky Is A Neighborhood – Foo Fighters
  19. K. – Cigarettes After Sex
  20. Helden – David Bowie