Tracking Motion using Blender

A lot of people who does TypeSetting use Mocha to do that!
But because I’m on Linux, this solution is not the best for me.
Here a tutorial to do that on Blender, a free and open-source software. You can use it on Windows too!

Install Aegisub Motion plugin

Do a tracking

In Aegisub

You should have open a video and a subtitle file.

  1. The first thing to do is to do you edit on the first frame when the edit appears on the video. And the end of the time must correspond to the last frame of the edit showing in this video.
    • to check that, time it, and with the directional arrow push right or left to see if in the previous/next frame, the edit is showing.
    • if yes, change the time in aegisub by the time by frame
    • and report the frame number to the good input (start/end) (EG: here the edit finish at 4752 but the last frame is 4753 - see under the video)
  2. After the 1. done, we’ll trim the video using Aegisub Motion. But before, you need to configure it once:
    • select the edit line (good timed) and select Automation > Aegisub-Motion > Trim Setting
    • here let’s video to ?video, change encoding preset to x264 and click on Encoder.. button.
    • Select the x264 binary (in Linux, it’s /sbin/x264 or /usr/bin/x264)
    • Save
    • select Automation > Aegisub-Motion > Trim
  3. Now in Blender
    • open the ‘movie clip editor’ view, in the bottom left
    • at the right of this, click on Open, open your video (it’s in the same folder than the video you open in aegisub, but with at the end [start_frame-end_frame])
    • At the mid-left, in tracking settings, change settings: pattern size at 15; search size at 61
    • change the motio to: Loc, for locality’s changing; LocRot, for locality+rotation’s changing; LocScale, for locality+size’s changing; LocRotScale, for locality+size+rotation’s changing.
    • change the match to > previous frame
    • add a marker (Marker > Add at the left)
    • in the right, check search in the marker display section
    • You can track it (using at the left Trackt section > Track > right directionnal arrow or left directionnal arrow)
  4. After that, we need to add the plugin to export the data to aegisub-motion. You need to do that once!
    • save
    • in blender: Edit > Preferences > Add-ons > install from file (select the file you’ve just downloaded!)
    • Do not forget to activate it! (by checking the box). The name in blender of this add-ons is Import-Export: Export: Adobe After Effects 6.0 Keyframe Data
  5. We can now do: file > export > dobe After Effects 6.0 Keyframe Data
    • save it on a file.
    • Open the file, copy the content
  6. And paste it into aegisub > Automation > Aegisub-Motion > Apply
Updated on October 9, 2016.