Blender Git Commit Log

Sequencer: Option to skip strip proxy generation if they already exists

This is a per-strip option next to the build proxy size which tells blender
whether to skip building proxy size if the file for it already exists or not.
The option is called "Overwrite" for simplicity.

This option is enabled by default to avoid changes in the file behavior.

TODO: Would be nice to do something like that for movie clips as well.