comedyret.blogg.se - Ffmpeg speed up video time lapse

#Ffmpeg speed up video time lapse archive
#Ffmpeg speed up video time lapse mac

#Ffmpeg speed up video time lapse mac

The Free, Easy, and Secure Way to Encrypt Shared Dropbox Folders on Your Mac Sunday, March 29, 2015 Debugging extensions is currently a huge pain.

#Ffmpeg speed up video time lapse archive

It would be nice to stop an archive action without needing to restart the app.

Reopen more than the most recent closed tab in Safari.

Expire old reviews (1yr+) when new versions of app have since been released.

Direct refunds without iTunes support involvement.

(I've mentioned this on Twitter) Fix the UX with reviews of physical locations.

Send from an alias like Gmail web client lets you.

I open it up whenever I want to search for a message. Right now this is the only reason I still have the Gmail app still on my phone.

Needs to be a way to close all tabs in Safari without tapping the screen 50x times.

At the moment, it's not shared between devices and will be lost permanently if you don't have an encrypted local iTunes backup of your device.

Export Health.app data or save it in iCloud with a password.

Re-adding this on every device is really tedious.

Save alarm and world clock data in iCloud.

It's time to modernize the UI for Notes.app and Reminders.app.

Really want to hide my carrier and clean up that status bar.

Let apps define associated URLs (* –> open Twitter.app). Here's my list of things I'd be overjoyed to see fixed / announced / released at WWDC 2015 next week. Enjoy! WWDC 2015 Wishlist Wednesday, June 3, 2015 If you're interested in the final product, you can check it out on YouTube. This tells FFmpeg to take all of the JPEGs in the directory starting with _DSF and ending with 4 digits, and to output an h.264 video with the yuv420p colorspace to video.mp4. Once you've decided on your reference image, run the following on every image except the reference image (otherwise the universe will explode).įfmpeg -start_number 1 -i _DSF%04d.JPG -c:v libx264 -pix_fmt yuv420p timelapse.mp4 The idea to use a reference image to generate a histogram that we want all of the other images to match.

To help achieve this end, I used an ImageMagick script called histmatch, generously provided by Fred Weinhaus (link: ). Obviously, this won't look great in your final video, so we're going to normalize the colors to a set distribution.įor an example, just compare the following two images (especially notice the trees, which are much lighter in the first example than the second): Sometimes images captured in a time lapse have very different histograms (especially if you have auto-aperture / shutter-speed enabled), and this can make things look "jumpy" from frame to frame. Note: this step might not be necessary in your situation, but it greatly improved the quality of the final product for me. Mogrify -resize 600x -write RESIZED_PHOTO_DIRECTORY/$FILE $FILE \ To start, make sure you're in the directory with all of your photos. This will resize your images to a preferred resolution (in this case, 1280x720), and will potentially crop off the sides or top in the process. If you're like me, and you don't care too much about maintaining the current aspect ratio, here's what you can do. Since I planned to upload my video to YouTube, I referenced a handy page they have that lists out their preferred resolutions, codecs, and formats for upload ( ).

Therefore, the first thing you should probably do is check the size of your images and, if necessary, resize them to be a bit smaller so they will play more nicely with FFmpeg and any other image manipulation that you're going to do. During my first tests, making movies from images this large gave really inconsistent results and took a long time to create, with not much extra benefit. ResizingĮven though I turned off RAW on the X100T, the images were still pretty huge (4896x3264). Note: Everything in this tutorial assumes that you have a current copy of ImageMagick and FFmpeg installed on your machine. So, as any self-respecting engineer would, I set out to create a time-lapse using only my trusty command-line tools: FFmpeg and ImageMagick. After all was said and done, I ended up with 400 images depicting clouds moving over a mountain peak and not much idea of what to do with them. Yesterday, I set it up on an interval timer and pointed it right towards Rainbow Mountain, which faces the patio in the kitchen of the little condo unit we're renting out. Expecting some beautiful landscapes and weather, I brought my newly acquired X100T to take some nice photos. We're vacationing in Whistler, BC right now as "endurance spectators" to my father-in-law's 3rd Ironman triathlon.

Making a time-lapse on the command line using FFmpeg and ImageMagick Sunday, July 26, 2015