source/blender/sequencer/SEQ_sequencer.h

@@ -66,7 +66,7 @@ struct ListBase *SEQ_active_seqbase_get(const struct Editing *ed);
  * \param seqbase: ListBase with strips
  */
 void SEQ_seqbase_active_set(struct Editing *ed, struct ListBase *seqbase);
-struct Sequence *SEQ_sequence_alloc(ListBase *lb, int timeline_frame, int machine, int type);
+struct Sequence *SEQ_sequence_alloc(ListBase *lb, double start_time, int machine, int type);
 void SEQ_sequence_free(struct Scene *scene, struct Sequence *seq);
 /**
  * Get #MetaStack that corresponds to current level that is being viewed

source/blender/sequencer/intern/sequencer.c

@@ -112,7 +112,7 @@ static void seq_free_strip(Strip *strip)
   MEM_freeN(strip);
 }
 
-Sequence *SEQ_sequence_alloc(ListBase *lb, int timeline_frame, int machine, int type)
+Sequence *SEQ_sequence_alloc(ListBase *lb, double start_time, int machine, int type)
 {
   Sequence *seq;
 
@@ -123,7 +123,7 @@ Sequence *SEQ_sequence_alloc(ListBase *lb, int timeline_frame, int machine, int
   seq->name[2] = 0;
 
   seq->flag = SELECT;
-  seq->start = timeline_frame;
+  seq->start = start_time;
   seq->machine = machine;
   seq->sat = 1.0;
   seq->mul = 1.0;

source/blender/sequencer/intern/strip_add.c

@@ -160,8 +160,10 @@ Sequence *SEQ_add_mask_strip(Scene *scene, ListBase *seqbase, struct SeqLoadData
 
 Sequence *SEQ_add_effect_strip(Scene *scene, ListBase *seqbase, struct SeqLoadData *load_data)
 {
-  Sequence *seq = SEQ_sequence_alloc(
-      seqbase, load_data->start_frame, load_data->channel, load_data->effect.type);
+  Sequence *seq = SEQ_sequence_alloc(seqbase,
+                                     SEQ_time_frames_to_seconds(scene, load_data->start_frame),
+                                     load_data->channel,
+                                     load_data->effect.type);
 
   seq->flag |= SEQ_USE_EFFECT_DEFAULT_FADE;
   struct SeqEffectHandle sh = SEQ_effect_handle_get(seq);
@@ -175,7 +177,7 @@ Sequence *SEQ_add_effect_strip(Scene *scene, ListBase *seqbase, struct SeqLoadDa
   }
 
   if (!load_data->effect.seq1) {
-    SEQ_time_strip_length_set(scene, seq, 0); /* XXX Effect is generator, set non zero length. */
+    SEQ_time_strip_length_set(scene, seq, 0);
     seq->flag |= SEQ_SINGLE_FRAME_CONTENT;
     SEQ_time_right_handle_frame_set(scene, seq, load_data->effect.end_frame);
   }

source/blender/sequencer/intern/strip_time.c

@@ -571,13 +571,13 @@ void SEQ_time_left_handle_frame_set(const Scene *scene, Sequence *seq, int timel
     timeline_frame = right_handle_orig_frame - 1;
   }
 
-  float offset = timeline_frame - SEQ_time_start_frame_get(scene, seq);
+  float offset = SEQ_time_frames_to_seconds(scene, timeline_frame) - seq->start;
 
   if (SEQ_transform_single_image_check(seq)) {
     /* This strip has only 1 frame of content, that is always stretched to whole strip length.
      * Therefore, strip start should be moved instead of adjusting offset. */
     SEQ_time_start_frame_set(scene, seq, timeline_frame);
-    seq->endofs += offset;
+    seq->len -= offset;
   }
   else {
     seq->startofs = offset;
@@ -597,7 +597,15 @@ void SEQ_time_right_handle_frame_set(const Scene *scene, Sequence *seq, int time
     timeline_frame = left_handle_orig_frame + 1;
   }
 
-  seq->endofs = SEQ_time_content_end_frame_get(scene, seq) - timeline_frame;
+  if (SEQ_transform_single_image_check(seq)) {
+    double strip_end_time = seq->start + seq->len;
+    double time = SEQ_time_frames_to_seconds(scene, timeline_frame);
+    seq->len += time - strip_end_time;
+  }
+  else {
+    seq->endofs = seq->start + seq->len - SEQ_time_frames_to_seconds(scene, timeline_frame);
+  }
+
   seq->enddisp = timeline_frame; /* Only to make files usable in older versions. */
 
   SEQ_time_update_meta_strip_range(scene, seq_sequence_lookup_meta_by_seq(scene, seq));