This function can be used to "dissolve" meta strip anywhere in strip
hierarchy. This has same effect as `meta_separate` operator.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/T91005
When splitting strips, first they are duplicated and then offsets
adjusted. This can fail on cross transitions, because some strips don't
overlap with split frame.
All strips, that relate to each other must be duplicated to ensure
correct relations after splitting, so solution is to delete non
overlapping strips from left or right side respectively.
Since cross transition don't have to overlap with source strips,
splitting such strips would lead to effect being deleted, which
could cause crash when iterating over strips in python. Therefore
splitting of such strips is now forbidden and will generate error.
Splitting of transition will also generate error solely because such
operation is illogical.
Reviewed By: sergey
Differential Revision: https://developer.blender.org/D12121
Use lookup string callback function for `sequences_all` RNA property
`rna_SequenceEditor_sequences_all_lookup_string` using a GHash for faster lookups.
When names are changed or strips are added/removed the lookup is tagged invalid.
The next time the lookup is used it will rebuild it.
Reviewed By: sergey, jbakker
Differential Revision: https://developer.blender.org/D11544
There were multiple cases that could lead to problems like moving meta
strip into itself or into it's children meta strips.
Print error string to console when invalid action is requested.
This function can be used to move strips into meta strips with no
side effects like change of selection state.
Reviewed By: ISS
Differential Revision: https://developer.blender.org/D10759
