Quentin's Blog

[quentinms]

Creating a timelapse with ffmpeg on macOS

Had to resort to using ffmpeg to create a timelapse because iMovie doesn’t let you do 4:3 movies for some reason, and I didn’t want to download a new video editor.

In a directory where the photos are named photo-00001.JPG to photo-00456.JPG (using macOS Finder’s batch renaming tool)

ffmpeg -f image2 -r 10 -i photo-%05d.JPG \ -c:v h264_videotoolbox -b:v 8500k \ -preset slowest -profile:v high \ -allow_sw 1 output.mp4

-r 10 tells it to use 10 images per second

-c:v h264_videotoolbox makes it use macOS’ hardware-accelerated video tools

-b:v 8500k to set the bitrate (try experimenting with the value)

-preset slowest and -profile:v high for the best quality

-allow_sw 1 because otherwise I was getting an error 🤷‍♂️

result: https://vimeo.com/803101481

[programmerryangosling]

[quentinms]

Green Hackathon blu

In short  : 

 35+ hours without sleeping.

 5+ liters of Pepsi & Coffee.

In an ex nuclear reactor in KTH, several meters under the surface. Therefore no sun for more than 24 hours (Yay, I'm prepared for swedish winter now!). Note that there are less radiations down there than at the surface!

With around 30 great guys (and girls!) from all over the world.

Lots of fine food (yeah seriously, no pizza but smoked salmon, chicken,grilled pork,etc.)

So what you do when you're a noob like me is spend the night learning how to use the useful stuff you don't learn at school (in this case, struts2 and jsp) and try to have something functional in the morning. Also, it’s fun to team with people you have never met before 

   The winner hack by James: CO2 emissions in Minecraft! (Spoiler: Burning trees is bad, and so is burning chickens)

And what we did: 

Anyway, it was really fun, met a lot of great people and got a T-Shirt :D

[jmak]

[quentinms]

jmak:

Thanks, Steve.

Posting designs like this one makes me paranoid, because I can’t shake the feeling that it’s not original. I enjoyed the process regardless, but please let me know if somebody else beat me to the idea!

Thoughts?

[quentinms]

Thank you so much Steve. I'll miss you. 

[allenpaltrow-deactivated2014052]

[quentinms]

allenpaltrow:

Growing up I was a huge apple fan-boy (fine, still am.) The first NY apple store in Soho opening was probably the coolest thing that happened to me between the ages 6 and 12. For a while I would spend almost every weekend there. Every year for halloween I was a mac, and I made a habit of shaving...

[quentinms]

Balloon! :D

[quentinms]

C'est pas le RLC mais c'est pas trop mal :)

[quentinms]

My first week in Sweden :)

[quentinms]

Universitetet Station

[quentinms]

Well, so you follow me :)

My first tumblr question! :')

[quentinms]

En route pour Stockholm !

[quentinms]

... et le gif !

[quentinms]

La vidéo...

[quentinms]

Lundi prochain se tient la Keynote inaugurale de la WWDC (World Wide Developper Conference, le principal évènement Apple de l’année), et nous avons réservé une salle à l’EPFL pour projeter...

[quentinms]

It's towel day!

C'est parti pour se balader une journée avec une serviette sur les épaules ! :)

[quentinms]

Broadband Commission Working Group on Youth: Young Solutions to Global Challenges 2011, a set by itupictures on Flickr.

Such a wonderful day!