diff --git a/source/blender/sequencer/intern/render.cc b/source/blender/sequencer/intern/render.cc
index aef77028f8f..04c3ae918cc 100644
--- a/source/blender/sequencer/intern/render.cc
+++ b/source/blender/sequencer/intern/render.cc
@@ -923,7 +923,8 @@ static ImBuf *seq_render_effect_strip_impl(const SeqRenderData *context,
       for (i = 0; i < 3; i++) {
         /* Speed effect requires time remapping of `timeline_frame` for input(s). */
         if (input[0] && seq->type == SEQ_TYPE_SPEED) {
-          float target_frame = seq_speed_effect_target_frame_get(scene, seq, timeline_frame, i);
+          int target_frame = floor(
+              seq_speed_effect_target_frame_get(scene, seq, timeline_frame, i));
           ibuf[i] = seq_render_strip(context, state, input[0], target_frame);
         }
         else { /* Other effects. */
diff --git a/source/blender/sequencer/intern/strip_time.cc b/source/blender/sequencer/intern/strip_time.cc
index 9a3fde5bbd7..e46baee71b7 100644
--- a/source/blender/sequencer/intern/strip_time.cc
+++ b/source/blender/sequencer/intern/strip_time.cc
@@ -62,10 +62,11 @@ float SEQ_give_frame_index(const Scene *scene, Sequence *seq, float timeline_fra
   float frame_index;
   float sta = SEQ_time_start_frame_get(seq);
   float end = SEQ_time_content_end_frame_get(scene, seq) - 1;
-  const float frame_index_max = seq->len - 1;
+  float frame_index_max = seq->len - 1;
 
   if (seq->type & SEQ_TYPE_EFFECT) {
     end = SEQ_time_right_handle_frame_get(scene, seq);
+    frame_index_max = end - sta;
   }
 
   if (end < sta) {