- Corrected movie clip length computation

- Ignore clip's offset for movie clip sequencer strip

source/blender/blenkernel/intern/movieclip.c

@@ -292,11 +292,11 @@ static void movieclip_calc_length(MovieClip *clip)
 			clip->len = framenr + 1;
 		}
 		else {
-			for (;; ) {
+			for (;;) {
 				get_sequence_fname(clip, framenr, name);
 
 				if (!BLI_exists(name)) {
-					clip->len = framenr + 1;
+					clip->len = framenr;
 					break;
 				}
 

source/blender/blenkernel/intern/sequencer.c

@@ -2186,7 +2186,7 @@ static ImBuf *seq_render_movieclip_strip(SeqRenderData context, Sequence *seq, f
 
 	memset(&user, 0, sizeof(MovieClipUser));
 	
-	BKE_movieclip_user_set_frame(&user, nr + seq->anim_startofs);
+	BKE_movieclip_user_set_frame(&user, nr + seq->anim_startofs + seq->clip->start_frame);
 
 	user.render_size = MCLIP_PROXY_RENDER_SIZE_FULL;