Walkthrough exports awkward clip transition within avi

[Anonymous]

Hello, 

I need some advise. After the compression process, the avi export file contains an awkward transition that I wish to change to the standard keyframed walkthrough instead of the display box growing smaller and bigger mid animation. I attached a video to help depict the issue. 

I have tried:

Changing the number of frames. 

Changing the frame range. 

Changing the frames per second. 

Changing the visual style. 

Changing the video compression from

• Full Frames (Uncompressed) which works the best 
• Intel IYUV codec (I dont know why two are listed as options but not something better)
• Microsoft video 1 (works the worst)

Any advice would be appreciated. Bonus points if you can provide a link to make a gif or export large amounts of photos 

[L.Maas]

What I have done in the past was to export images from Revit. Then used ffmpeg to stitch the together to a movie.

Advantage is that when rendering fails at some point, you do not have to start from the beginning. And if you need to drop a sequence you can delete the images/frames before stitching the rest together

[dgorsman]

Basically, anything other than very short movies are best done rendering to frames and then using other software to post-process them and add them to the video container.  The latter is one of the last steps you want to do, as repeatedly compressing/decompressing video content results in poor quality.

Blender can do a number of editing and compositing functions on sequences and video; it uses ffmpeg in the background.  There's similar (but better) video editing products from Adobe, Black Magic, and others.

[ovidiu_paunescu]

Hello @Anonymous

That's a strange behavior.

You might want to check the camera positioning, size of the view, resolution of the exported video.

I've worked with walkthroughs quite a lot and here are my recommendations:

• Use the Full Frames (Uncompressed) setting.
  • when using the full frames setting what i do is limit the export to about 300-350 fps so that the avi file is less than 2GB (I'm using camtasia to edit the video and it seems unable to open the files if larger then 2gb)
  • For a 900 frames walkthrough 1-300; 301-600; 601-900 then stitch the videos back together 

• After export, crop the video to the edges (it usually results with a white ban around the frame)

• You can export the same walkthrough with different view settings and then transition between the two in editing - really nice effect.