Refacto of the scene cut detection, make it generic and add another algorythm as an option

operators/imports.py

@@ -460,16 +460,25 @@ class VSETB_OT_import_shots(Operator):
 
         conformed = False
 
-        scn.sequence_editor_clear()
-        scn.sequence_editor_create()
+        if import_shots.clear:
+            frame_index = 1
+            scn.sequence_editor_clear()
+            scn.sequence_editor_create()
+        else:
+            frame_index = scn.frame_end +1
 
         self.set_sequencer_channels([t.name for t in task_types])
-        frame_index = 1
+
+
         for sequence in sequences:
             shots_data = tracker.get_shots(sequence=sequence.id)
             sequence_start = frame_index
             for shot_data in shots_data:
-                frames = int(shot_data['nb_frames'])
+                frames = shot_data['nb_frames']
+                if not frames:
+                    frames = 100
+                    print(f'No nb frames on tracker for {shot_data["name"]}')
+                frames = int(frames)
                 frame_end = frame_index + frames
 
                 strip = scn.sequence_editor.sequences.new_effect(
@@ -497,9 +506,13 @@ class VSETB_OT_import_shots(Operator):
                     
                     print(f'Loading Preview from {preview}')
                     channel_index = get_channel_index(f'{task_type.name} Video')
-                    video_clip = import_movie(preview, frame_start=frame_index, frame_end=frame_end)
+                    video_clip = import_movie(preview, frame_start=frame_index)
                     video_clip.channel = channel_index
 
+                    if strip.frame_final_end != video_clip.frame_final_end:  # Conform shot duration to longest media
+                        frames = video_clip.frame_final_duration
+                        strip.frame_final_end = video_clip.frame_final_end
+
                     if video_clip.frame_offset_end:
                         video_clip.color_tag = 'COLOR_01'
 
@@ -511,8 +524,7 @@ class VSETB_OT_import_shots(Operator):
 
                     # Load Audio
                     channel_index = get_channel_index(f'{task_type.name} Audio')
-                    audio_clip = import_sound(preview, frame_start=frame_index, 
-                        frame_end=frame_end)
+                    audio_clip = import_sound(preview, frame_start=frame_index)
                     audio_clip.channel = channel_index
                     if video_clip.frame_offset_end:
                         audio_clip.color_tag = 'COLOR_01'
@@ -632,6 +644,8 @@ class VSETB_OT_import_shots(Operator):
                 row = split.row()
                 row.label(icon="ERROR")
                 row.label(text='Add at least one Sequence')
+        
+        layout.prop(import_shots, 'clear', text='Clear')
 
     def invoke(self, context, event):
         scn = context.scene