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When I add any strip to Blender's Video Sequence Editor, the default Blend Type is Cross.

Is it possible to change the default to Alpha Over?

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    $\begingroup$ I think you'll have to replace the Add movie strip operator with one of your own, which sets the blend_type. $\endgroup$ – gandalf3 Jun 27 '14 at 6:14
  • $\begingroup$ I guess I would have to also replace the sequencer.scene_strip_add, sequencer.image_strip_add, and sequencer.effect_strip_add operators in addition to sequencer.movie_strip_add. $\endgroup$ – Garrett Jun 27 '14 at 20:06
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    $\begingroup$ I have submitted a patch at developer.blender.org/D786 which changes the default blend type to Alpha Over. $\endgroup$ – Mutant Bob Sep 13 '14 at 13:34
  • $\begingroup$ @MutantBob Did that patch ever get merged? This is still bugging the crap out of me two years later. $\endgroup$ – Chase Sandmann Aug 15 '16 at 6:39
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You could get a script writer to make a add strip effect option. The Transform Addon currently creates a transform strip upon key press. So it is possible.

Currently over at the BA forum, user "snu" is actively developing a VSE script that might add this function for you. http://blenderartists.org/forum/showthread.php?338598-Addon-WIP-VSE-Quick-functions-Snaps-Fades-Zoom-Parenting-Titling-Play-speed

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No, there is no way to change the default type (without modifying the source code and making a custom build).

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    $\begingroup$ Do you not think there's any way to devise a workaround? I was about to put a bounty on this question because I use the VSE a lot and I'm losing a few seconds here and there having to switch to Alpha Over for each strip. $\endgroup$ – Garrett Jun 29 '14 at 9:25

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