diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index 5e401139c8..26bb2f2c6f 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -590,7 +590,7 @@ int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesiz
     uint8_t clear_block[4][MAX_BLOCK_SIZE] = {{0}}; // clear padding with 0
     int clear_block_size[4] = {0};
     ptrdiff_t plane_line_bytes[4] = {0};
-    int rgb, xyz, pal, limited, alpha, bitstream;
+    int rgb, xyz, pal, limited, alpha, bitstream, fltp;
     int plane, c;
 
     if (!desc || nb_planes < 1 || nb_planes > 4 || desc->flags & AV_PIX_FMT_FLAG_HWACCEL)
@@ -602,6 +602,7 @@ int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesiz
     limited = !rgb && !xyz && !pal && range != AVCOL_RANGE_JPEG;
     alpha = !pal && !!(desc->flags & AV_PIX_FMT_FLAG_ALPHA);
     bitstream = !!(desc->flags & AV_PIX_FMT_FLAG_BITSTREAM);
+    fltp = !!(desc->flags & AV_PIX_FMT_FLAG_FLOAT);
 
     for (c = 0; c < desc->nb_components; c++) {
         const AVComponentDescriptor comp = desc->comp[c];
@@ -621,11 +622,11 @@ int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesiz
         int w = (bitstream ? 8 : 1) * clear_block_size[comp.plane] / comp.step;
         uint8_t *c_data[4];
         const int c_linesize[4] = {0};
-        uint16_t src_array[MAX_BLOCK_SIZE];
-        uint16_t src = 0;
+        uint32_t src_array[MAX_BLOCK_SIZE];
+        uint32_t src = 0;
         int x;
 
-        if (comp.depth > 16)
+        if (comp.depth > 32)
             return AVERROR(EINVAL);
         if (w < 1)
             return AVERROR(EINVAL);
@@ -634,15 +635,26 @@ int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesiz
             src = 1;
         } else if (c + 1 == desc->nb_components && alpha) {
             // (Assume even limited YUV uses full range alpha.)
-            src = (1 << comp.depth) - 1;
+            if (fltp && comp.depth != 16 && comp.depth != 32)
+                return AVERROR(EINVAL);
+            if (fltp)
+                src = (comp.depth == 16 ? 0x3C00 : 0x3F800000); // 1.0
+            else
+                src = (comp.depth == 32 ? 0 : (1 << comp.depth)) - 1;
         } else if (c == 0 && limited && comp.depth > 1) {
-            if (comp.depth < 8)
+            if (comp.depth < 8 || fltp && comp.depth != 16 && comp.depth != 32)
                 return AVERROR(EINVAL);
-            src = 16 << (comp.depth - 8);
+            if (fltp)
+                src = (comp.depth == 16 ? 0x3000 : 0x3D800000); // 0.0625
+            else
+                src = 16 << (comp.depth - 8);
         } else if ((c == 1 || c == 2) && !rgb && !xyz) {
-            if (comp.depth < 8)
+            if (comp.depth < 8 || fltp && comp.depth != 16 && comp.depth != 32)
                 return AVERROR(EINVAL);
-            src = 128 << (comp.depth - 8);
+            if (fltp)
+                src = (comp.depth == 16 ? 0x3800 : 0x3F000000); // 0.5
+            else
+                src = 128 << (comp.depth - 8);
         }
 
         for (x = 0; x < w; x++)
@@ -651,7 +663,7 @@ int av_image_fill_black(uint8_t * const dst_data[4], const ptrdiff_t dst_linesiz
         for (x = 0; x < 4; x++)
             c_data[x] = &clear_block[x][0];
 
-        av_write_image_line(src_array, c_data, c_linesize, desc, 0, 0, c, w);
+        av_write_image_line2(src_array, c_data, c_linesize, desc, 0, 0, c, w, 4);
     }
 
     for (plane = 0; plane < nb_planes; plane++) {
diff --git a/tests/ref/fate/imgutils b/tests/ref/fate/imgutils
index 79ef5cdfc0..b589c49473 100644
--- a/tests/ref/fate/imgutils
+++ b/tests/ref/fate/imgutils
@@ -435,14 +435,14 @@ p016le          total_size:   9216,  black_unknown_crc: 0xfff85b60,  black_tv_cr
 p016be          total_size:   9216,  black_unknown_crc: 0x4d4d9903,  black_tv_crc: 0x4d4d9903,  black_pc_crc: 0x69c6fe01
 gray9be         total_size:   6144,  black_unknown_crc: 0xa913cdc7,  black_tv_crc: 0xa913cdc7,  black_pc_crc: 0x00000000
 gray9le         total_size:   6144,  black_unknown_crc: 0x05a944de,  black_tv_crc: 0x05a944de,  black_pc_crc: 0x00000000
-gbrpf32be       total_size:  36864,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-gbrpf32le       total_size:  36864,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-gbrapf32be      total_size:  49152,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-gbrapf32le      total_size:  49152,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
+gbrpf32be       total_size:  36864,  black_unknown_crc: 0x00000000,  black_tv_crc: 0x00000000,  black_pc_crc: 0x00000000
+gbrpf32le       total_size:  36864,  black_unknown_crc: 0x00000000,  black_tv_crc: 0x00000000,  black_pc_crc: 0x00000000
+gbrapf32be      total_size:  49152,  black_unknown_crc: 0xda9c5af9,  black_tv_crc: 0xda9c5af9,  black_pc_crc: 0xda9c5af9
+gbrapf32le      total_size:  49152,  black_unknown_crc: 0xd2f28790,  black_tv_crc: 0xd2f28790,  black_pc_crc: 0xd2f28790
 gray14be        total_size:   6144,  black_unknown_crc: 0x9bd1ea2b,  black_tv_crc: 0x9bd1ea2b,  black_pc_crc: 0x00000000
 gray14le        total_size:   6144,  black_unknown_crc: 0xb5289bc0,  black_tv_crc: 0xb5289bc0,  black_pc_crc: 0x00000000
-grayf32be       total_size:  12288,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-grayf32le       total_size:  12288,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
+grayf32be       total_size:  12288,  black_unknown_crc: 0x4bafcc11,  black_tv_crc: 0x4bafcc11,  black_pc_crc: 0x00000000
+grayf32le       total_size:  12288,  black_unknown_crc: 0xca17685c,  black_tv_crc: 0xca17685c,  black_pc_crc: 0x00000000
 yuva422p12be    total_size:  18432,  black_unknown_crc: 0xa7067ca1,  black_tv_crc: 0xa7067ca1,  black_pc_crc: 0xaa881b51
 yuva422p12le    total_size:  18432,  black_unknown_crc: 0xb6bdf055,  black_tv_crc: 0xb6bdf055,  black_pc_crc: 0x55b03edf
 yuva444p12be    total_size:  24576,  black_unknown_crc: 0x488f478f,  black_tv_crc: 0x488f478f,  black_pc_crc: 0xc6fb24d1
@@ -464,8 +464,8 @@ p216le          total_size:  12288,  black_unknown_crc: 0x6582d6cf,  black_tv_cr
 p416be          total_size:  18432,  black_unknown_crc: 0x26991800,  black_tv_crc: 0x26991800,  black_pc_crc: 0xfe7f6700
 p416le          total_size:  18432,  black_unknown_crc: 0x4028ac30,  black_tv_crc: 0x4028ac30,  black_pc_crc: 0xab7c7698
 vuya            total_size:  12288,  black_unknown_crc: 0x60db2d2c,  black_tv_crc: 0x60db2d2c,  black_pc_crc: 0x2dae630a
-rgbaf16be       total_size:  24576,  black_unknown_crc: 0x0ab5caf6,  black_tv_crc: 0x0ab5caf6,  black_pc_crc: 0x0ab5caf6
-rgbaf16le       total_size:  24576,  black_unknown_crc: 0x0ab5caf6,  black_tv_crc: 0x0ab5caf6,  black_pc_crc: 0x0ab5caf6
+rgbaf16be       total_size:  24576,  black_unknown_crc: 0x76fd69af,  black_tv_crc: 0x76fd69af,  black_pc_crc: 0x76fd69af
+rgbaf16le       total_size:  24576,  black_unknown_crc: 0x21283f40,  black_tv_crc: 0x21283f40,  black_pc_crc: 0x21283f40
 vuyx            total_size:  12288,  black_unknown_crc: 0x9181c808,  black_tv_crc: 0x9181c808,  black_pc_crc: 0xdcf4862e
 p012le          total_size:   9216,  black_unknown_crc: 0xfff85b60,  black_tv_crc: 0xfff85b60,  black_pc_crc: 0xc03cff93
 p012be          total_size:   9216,  black_unknown_crc: 0x4d4d9903,  black_tv_crc: 0x4d4d9903,  black_pc_crc: 0x69c6fe01
@@ -475,10 +475,10 @@ xv30be          total_size:  12288,  black_unknown_crc: 0x1c42115f,  black_tv_cr
 xv30le          total_size:  12288,  black_unknown_crc: 0x4bb0b075,  black_tv_crc: 0x4bb0b075,  black_pc_crc: 0x02d585cf
 xv36be          total_size:  24576,  black_unknown_crc: 0x6ba828bd,  black_tv_crc: 0x6ba828bd,  black_pc_crc: 0x5f450f41
 xv36le          total_size:  24576,  black_unknown_crc: 0xc3794950,  black_tv_crc: 0xc3794950,  black_pc_crc: 0x40874939
-rgbf32be        total_size:  36864,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-rgbf32le        total_size:  36864,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-rgbaf32be       total_size:  49152,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
-rgbaf32le       total_size:  49152,  black_unknown_crc: ----------,  black_tv_crc: ----------,  black_pc_crc: ----------
+rgbf32be        total_size:  36864,  black_unknown_crc: 0x00000000,  black_tv_crc: 0x00000000,  black_pc_crc: 0x00000000
+rgbf32le        total_size:  36864,  black_unknown_crc: 0x00000000,  black_tv_crc: 0x00000000,  black_pc_crc: 0x00000000
+rgbaf32be       total_size:  49152,  black_unknown_crc: 0x5eae6680,  black_tv_crc: 0x5eae6680,  black_pc_crc: 0x5eae6680
+rgbaf32le       total_size:  49152,  black_unknown_crc: 0x11d73f6d,  black_tv_crc: 0x11d73f6d,  black_pc_crc: 0x11d73f6d
 p212be          total_size:  12288,  black_unknown_crc: 0x0bbe5df7,  black_tv_crc: 0x0bbe5df7,  black_pc_crc: 0x16a51378
 p212le          total_size:  12288,  black_unknown_crc: 0x6582d6cf,  black_tv_crc: 0x6582d6cf,  black_pc_crc: 0xc9dc3ddf
 p412be          total_size:  18432,  black_unknown_crc: 0x26991800,  black_tv_crc: 0x26991800,  black_pc_crc: 0xfe7f6700
