I used the Techsmith codec when capturing with Camtasia.
The codecs you’ve listed are the one’s I have tried converting the Camtasia (techsmith codec) avis into and then reimported into AFX.
With each different codec, deinterlaced and interlaced the probelm still happens, after a few minutes the videos freeze, seems like it is connected with the RAM, the rest of the comps work fine, animations, other video assets not from Camtasia all work fine. If I purge the memory the camtasia files work for a few minutes again, When I try to render they work for part of the render process then seize up again…
Found a slow workaround turning the Camtasia avis into a PNG sequence.
Be good to know a proper fix.
Cheers Jon