diff --git a/modules/video_filter/blend.cpp b/modules/video_filter/blend.cpp
index 9161e653fb5ed358b5260d9dfca791d5c6cfacdc..63da1094906d522139655ceca2961b920dcce4f5 100644
--- a/modules/video_filter/blend.cpp
+++ b/modules/video_filter/blend.cpp
@@ -267,7 +267,7 @@ class CPictureRGBX : public CPicture {
 public:
     CPictureRGBX(const CPicture &cfg) : CPicture(cfg)
     {
-        if (GetPackedRgbIndexes(fmt, &offset_r, &offset_g, &offset_b, &offset_a) != VLC_SUCCESS) {
+        if (GetPackedRgbIndexes(fmt->i_chroma, &offset_r, &offset_g, &offset_b, &offset_a) != VLC_SUCCESS) {
             /* at least init to something on error to silence compiler warnings */
             offset_r = 0;
             offset_g = 1;
diff --git a/modules/video_filter/filter_picture.h b/modules/video_filter/filter_picture.h
index 9bc3a32e19ac8fb47c495a50fc2feefeacd35b7d..8ce66a61e0c51fc50145e84d3443953a18f23fc2 100644
--- a/modules/video_filter/filter_picture.h
+++ b/modules/video_filter/filter_picture.h
@@ -90,10 +90,10 @@ static inline int GetPackedYuvOffsets( vlc_fourcc_t i_chroma,
     }
 }
 
-static inline int GetPackedRgbIndexes( const video_format_t *p_fmt, int *i_r_index,
+static inline int GetPackedRgbIndexes( vlc_fourcc_t fcc, int *i_r_index,
                                        int *i_g_index, int *i_b_index, int *i_a_index )
 {
-    switch(p_fmt->i_chroma)
+    switch(fcc)
     {
         case VLC_CODEC_RGBA:
             *i_r_index = 0;
diff --git a/modules/video_filter/sepia.c b/modules/video_filter/sepia.c
index 396959b29b583ba4cde52dfb45bc5d8f169be910..3d230634d3df67efa1f1a7513a92e84e0015c65b 100644
--- a/modules/video_filter/sepia.c
+++ b/modules/video_filter/sepia.c
@@ -410,7 +410,7 @@ static void RVSepia( picture_t *p_pic, picture_t *p_outpic, int i_intensity )
                     p_pic->format.i_chroma != VLC_CODEC_BGR24;
     int i_rindex = 0, i_gindex = 1, i_bindex = 2, i_aindex = -1;
 
-    GetPackedRgbIndexes( &p_outpic->format, &i_rindex, &i_gindex, &i_bindex, &i_aindex );
+    GetPackedRgbIndexes( p_outpic->format.i_chroma, &i_rindex, &i_gindex, &i_bindex, &i_aindex );
 
     p_in = p_pic->p[0].p_pixels;
     p_in_end = p_in + p_pic->p[0].i_visible_lines