Movie

Experience with g4daeview

• geant4/geometry/collada/g4daeview/g4daeview_usage.txt

With g4daeview created movie using QuickTime Player.app

• File > New Screen Recording or command+control+N

  • dialog pops up : click to record entire screen, drag to record part of screen
  • creates a very large .mov (~1GB for ~2min)
  • stop recording using : command+control+escape

• File > Export ... to compress .mov to .m4v

Resulting movies like the below however need editing to avoid boring waits between action.

• /Users/blyth/Dropbox/Public/g4daeview_001.m4v

References

• google:iMovie Quicktime App
  • https://developer.apple.com/app-store/app-previews/imovie/Creating-App-Previews-with-iMovie.pdf
• google:iMovie import screen capture
• http://www.makeuseof.com/tag/5-best-screen-recorders-capturing-mac-os-x/

QuickTime Player 10.3

• curiously “View > Actual Size” clips the edges with g4daeview_001.m4v, the movie inspector says:
  • Format: H.264, 1728x1080
  • Current Size: 1440x900

Retina full is: 2880x1800 dividing by 2: 1440x900

In [2]: 1728./1080.
Out[2]: 1.6

In [3]: 16./9.
Out[3]: 1.7777777777777777

Aspect Ratio

1:1   1.0
5:4   1.25
4:3   1.333     Standard 4:3: 320x240, 640x480, 800x600, 1024x768
8:5   1.6
16:9  1.777     Widescreen 16:9: 640x360, 800x450, 960x540, 1024x576, 1280x720, and 1920x1080

What size video ?

• GTC provides projector : 1920x1080p @ 60hz
• what size ggv window to record ?
• when dragging a region, resulting video seems to be twice the pixel size selected, but seems no way to get a precise pixel dimension
• https://forums.creativecow.net/thread/335/37515
• https://www.techsmith.com/tutorial-camtasia-mac-aspect-ratio-current.html

Automated Screen Capture

• http://apple.stackexchange.com/questions/176555/how-do-i-make-multiple-screen-recordings-with-the-exact-same-portion-of-the-scre

QuickTime Applescript

• it seems no way to control the screen area recorded via scripting
• http://www.neerajkumar.net/blog/2013/02/16/script-to-record-screen-on-mac-osx-and-save-on-disk/

iMovie importing

• https://discussions.apple.com/thread/2282019?start=0&tstart=0
  • (circa 2010) implies that .mov (the uncompressed one) is best out of .mov or .m4v