Commit 8903205dd9 fixed incorrect math, in stream length setting part of
the code, which seemed to force most video files to use safer, but more
complicated codepath.
Even though the math was corrected, the logic was not great. It tried to
use container duration, only stream duration is not significantly (4x!)
longer. This is quite crude.
Instead, check if there is any significant difference between stream and
container durations. The threshold is kept quite high, just to be safe.
This code should be removed in futute cleanup / refactoring.
Pull Request: https://projects.blender.org/blender/blender/pulls/126866
cab93f77eb