JVC introductory video

I'm really into all things meta.

Thus, the video introduction to JVC was created with JVC.

Input Assets

The files in assets are what I started with:

• jvc-slides.odp is a presentation created in LibreOffice
• jvc-slidesNN.png are PNG images of each slide, exported manually from LibreOffice
• iphone_NN*.mp4 are videos I took with my iPhone
  • I used jrmtrack infile.MOV assets/iphone_NN_desc.mp4 other to remove data tracks and repackage from .mov to .mp4
• build_screencast.mp4 is a portion of a screencast I created using OBS Studio
  • I used jtrim infile.mkv assets/build_screencast.mp4 to crop the original screencast, which was over 250MB
• Some video files are re-created from sub-parts (.1, .2, etc.) because GitHub does not allow files larger than 100MB

Build

To create the video, run:

./make-jvc-vid

This will take a long time, especially if it has to build jvc first.

Also, you'll need to the HEAD version of ffmpeg. The duration option for anullsrc is not yet supported in latest official ffmpeg release, this is required for overlay and merge-audio operations.

You can read through the make-jvc-vid script to see how the video is put together.

The basic steps are:

• For each iphone video, crop out the footage of "I'm touching the screen to start/stop recording"
• For each slide image, use the ken-burns effect with no zoom or pan to create a video of a duration that is about 1 to 1.5 seconds longer than the corresponding iphone video.
• For each slide video, overlay the corresponding iphone video, creating an "overlay" output video.
• Prepare and overlay the "clone and build" screencast video.
• Lastly, concatenate all overlay output videos to produce the final output video.

Watch the video!

Assuming you have VLC installed, run:

vlc ./jvc-vid.mp4