Whoa, a new feature!

Sequence Editor: SHIFT+R, Remap Paths (also in pull down menu)

This allows to remap the root of a path to another directory.
Works on all selected Image strips. That way you can make absolute
paths relative, for example.

Example:
original path: /mnt/orange/finals/06_which_way/06_03b/
to be remapped: /mnt/orange/finals/
remap to: //
new path: //06_which_way/06_03b/

source/blender/include/BIF_editseq.h

@@ -58,6 +58,7 @@ void				seq_snap_menu(void);
 void				set_filter_seq(void);
 void				swap_select_seq(void);
 void				touch_seq_files(void);
+void				seq_remap_paths(void);
 void				transform_seq(int mode, int context);
 void				un_meta(void);
 void				seq_cut(int cutframe);

source/blender/src/editseq.c

@@ -1981,6 +1981,48 @@ void set_filter_seq(void)
 
 }
 
+void seq_remap_paths(void)
+{
+	Sequence *seq, *last_seq = get_last_seq();
+	Editing *ed;
+	char from[FILE_MAX], to[FILE_MAX], stripped[FILE_MAX];
+	
+	ed= G.scene->ed;
+	if(ed==NULL || last_seq==NULL) 
+		return;
+	
+	BLI_strncpy(from, last_seq->strip->dir, FILE_MAX);
+	if (0==sbutton(from, 0, sizeof(from)-1, "From: "))
+		return;
+	
+	strcpy(to, from);
+	if (0==sbutton(to, 0, sizeof(to)-1, "To: "))
+		return;
+	
+	if (strcmp(to, from)==0)
+		return;
+	
+	WHILE_SEQ(ed->seqbasep) {
+		if(seq->flag & SELECT) {
+			if(strncmp(seq->strip->dir, from, strlen(from))==0) {
+				printf("found %s\n", seq->strip->dir);
+				
+				/* strip off the beginning */
+				stripped[0]= 0;
+				BLI_strncpy(stripped, seq->strip->dir + strlen(from), FILE_MAX);
+				
+				/* new path */
+				BLI_strncpy(seq->strip->dir, to, FILE_MAX);
+				strcat(seq->strip->dir, stripped);
+				printf("new %s\n", seq->strip->dir);
+			}
+		}
+	}
+	END_SEQ
+		
+	BIF_undo_push("Remap paths in Sequencer");
+	allqueue(REDRAWSEQ, 0);
+}
 
 
 void no_gaps(void)

source/blender/src/header_seq.c

@@ -385,6 +385,9 @@ static void do_seq_editmenu(void *arg, int event)
 	case 14:
 		reassign_inputs_seq_effect();
 		break;
+	case 15:
+		seq_remap_paths();
+		break;
 	}
 }
 
@@ -423,6 +426,10 @@ static uiBlock *seq_editmenu(void *arg_unused)
 		}
 		else if(last_seq->type == SEQ_IMAGE) uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Change Image...|C", 0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 0, 1, "");
 		else uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Change Scene...|C", 0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 0, 1, "");
+		
+		if(last_seq->type==SEQ_IMAGE)
+			uiDefIconTextBut(block, BUTM, 1, ICON_BLANK1, "Remap Paths...|Shift R", 0, yco-=20, menuwidth, 19, NULL, 0.0, 0.0, 0, 15, "");
+			
 	}
 
 /*	if (last_seq != NULL && last_seq->type == SEQ_MOVIE) {

source/blender/src/space.c

@@ -4473,6 +4473,9 @@ static void winqreadseqspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			}
 			break;
 		case RKEY:
+			if((G.qual==LR_SHIFTKEY))
+				seq_remap_paths();
+			else
 				reassign_inputs_seq_effect();
 			break;
 		case SKEY:

source/blender/src/toolbox.c

@@ -305,7 +305,7 @@ short sbutton(char *var, float min, float max, char *str)
 
 	getmouseco_sc(mval);
 	
-	if(mval[0]<150) mval[0]=150;
+	if(mval[0]<250) mval[0]=250;
 	if(mval[1]<30) mval[1]=30;
 	if(mval[0]>G.curscreen->sizex) mval[0]= G.curscreen->sizex-10;
 	if(mval[1]>G.curscreen->sizey) mval[1]= G.curscreen->sizey-10;
@@ -313,11 +313,11 @@ short sbutton(char *var, float min, float max, char *str)
 	block= uiNewBlock(&listb, "button", UI_EMBOSS, UI_HELV, G.curscreen->mainwin);
 	uiBlockSetFlag(block, UI_BLOCK_LOOP|UI_BLOCK_REDRAW|UI_BLOCK_RET_1|UI_BLOCK_ENTER_OK);
 
-	x1=mval[0]-150; 
+	x1=mval[0]-250; 
 	y1=mval[1]-20; 
 	
-	uiDefButC(block, TEX, 32766, str,	x1+5,y1+10,125,20, var,(float)min,(float)max, 0, 0, "");
-	uiDefBut(block, BUT, 32767, "OK",	x1+136,y1+10,25,20, NULL, 0, 0, 0, 0, "");
+	uiDefButC(block, TEX, 32766, str,	x1+5,y1+10,225,20, var,(float)min,(float)max, 0, 0, "");
+	uiDefBut(block, BUT, 32767, "OK",	x1+236,y1+10,25,20, NULL, 0, 0, 0, 0, "");
 
 	uiBoundsBlock(block, 5);
 	
@@ -326,6 +326,7 @@ short sbutton(char *var, float min, float max, char *str)
 
 	if(ret==UI_RETURN_OK) return 1;
 	return 0;
+	
 }
 
 short fbutton(float *var, float min, float max, float a1, float a2, char *str)