# Test images

## Still images

### File [abc.png](abc.png)

![](abc.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Black opaque letters "abc" written on a translucent white background.

### File [abc_color_irot_alpha_irot.avif](abc_color_irot_alpha_irot.avif)

![](abc_color_irot_alpha_irot.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

`abc.png` encoded with libavif and having a correct association between the
`irot` transformative property and the alpha auxiliary image item corresponding
to the same rotation applied to the color image item.

### File [abc_color_irot_alpha_NOirot.avif](abc_color_irot_alpha_NOirot.avif)

![](abc_color_irot_alpha_NOirot.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

`abc.png` encoded with libavif 1.3.0 and missing an association between the
`irot` transformative property and the alpha auxiliary image item.

### File [circle-trns-after-plte.png](circle-trns-after-plte.png)

![](circle-trns-after-plte.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

An opaque blue circle on a transparent green background.

It is of color type 2 (PNG_COLOR_TYPE_RGB) and has a tRNS chunk after a PLTE
chunk.

### File [circle-trns-before-plte.png](circle-trns-before-plte.png)

![](circle-trns-before-plte.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

An opaque blue circle on a transparent green background.

It is of color type 2 (PNG_COLOR_TYPE_RGB) and has a tRNS chunk before a PLTE
chunk. Since the PNG specification version 1.2 says "the tRNS chunk [...] must
follow the PLTE chunk, if any", libpng 1.6.46 or older considers the tRNS chunk
as invalid and ignores it. The behavior changed starting with libpng 1.6.47.
See https://github.com/pnggroup/libpng/blob/libpng16/CHANGES#L6243-L6246.

### File [circle_custom_properties.avif](circle_custom_properties.avif)

![](circle_custom_properties.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `avifenc circle-trns-after-plte.png` with custom properties added in
`avifRWStreamWriteProperties()`: FullBox `1234`, Box `abcd` and Box `uuid`.

### File [clap_irot_imir_non_essential.avif](clap_irot_imir_non_essential.avif)

![](clap_irot_imir_non_essential.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: File generated with `TransformTest.ClapIrotImir` from
`aviftransformtest.cc`, where `clap`, `irot` and `imir` are tagged as
non-essential.

### File [clop_irot_imor.avif](clop_irot_imor.avif)

![](clop_irot_imor.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: File generated with `TransformTest.ClapIrotImir` from
`aviftransformtest.cc`, where essential `clap` property was replaced by made-up
non-essential `clop` property and essential `imir` property was replaced by
made-up non-essential `imor` property.

### File [draw_points.png](draw_points.png)

![](draw_points.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Generated with ImageMagick's `convert` command:

```
  convert -size 3x1 xc:red -alpha on -fill '#00F8' \
          -draw 'point 1,0' \
          -draw 'color 2,0 point' -scale 33x33 draw_points.png
```

It is of color type 3 (PNG_COLOR_TYPE_PALETTE) and has a tRNS chunk.

### File [extended_pixi.avif](extended_pixi.avif)

![](extended_pixi.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Generated with `avifpixitest` (4:2:0, vertical chroma sample position).

### File [white_1x1.avif](white_1x1.avif)

![](white_1x1.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: single white pixel encoded with libavif at default quality.

### Files `kodim*`

#### File [kodim03_yuv420_8bpc.avif](io/kodim03_yuv420_8bpc.avif)

![](io/kodim03_yuv420_8bpc.avif)

License: released by the Eastman Kodak Company for unrestricted usage

#### File [kodim03_grayscale_gamma1.6.png](kodim03_grayscale_gamma1.6.png)

![](kodim03_grayscale_gamma1.6.png)

License: released by the Eastman Kodak Company for unrestricted usage

It is [kodim03_yuv420_8bpc.avif](io/kodim03_yuv420_8bpc.avif) converted to
grayscale and tagged as Gamma 1.6 gAMA PNG chunk.

#### File [kodim03_grayscale_cicp.png](kodim03_grayscale_cicp.png)

![](kodim03_grayscale_cicp.png)

License: released by the Eastman Kodak Company for unrestricted usage

It is [kodim03_yuv420_8bpc.avif](io/kodim03_yuv420_8bpc.avif) converted to
grayscale and tagged with a cICP chunk.

#### File [kodim03_grayscale_gamma1.6-reference.png](kodim03_grayscale_gamma1.6-reference.png)

![](kodim03_grayscale_gamma1.6-reference.png)

License: released by the Eastman Kodak Company for unrestricted usage

It is [kodim03_grayscale_gamma1.6.png](kodim03_grayscale_gamma1.6.png)
converted into sRGB colorspace by Chrome using "Capture Node Screenshot"
in DevTools.

#### File [kodim23_yuv420_8bpc.avif](io/kodim23_yuv420_8bpc.avif)

![](io/kodim23_yuv420_8bpc.avif)

License: released by the Eastman Kodak Company for unrestricted usage

Source: <http://r0k.us/graphics/kodak/>

### Files `cosmos*`

#### File [cosmos1650_yuv444_10bpc_p3pq.avif](io/cosmos1650_yuv444_10bpc_p3pq.avif)

![](io/cosmos1650_yuv444_10bpc_p3pq.avif)

License: [Creative Commons Attribution license (reuse allowed)](https://creativecommons.org/licenses/by/3.0/legalcode)

Source: ["Cosmos Laundromat" movie](https://www.youtube.com/watch?v=Y-rmzh0PI3c) (frame at around 1 minute past the
beginning)

### Files with high bit depth per channel

#### File [weld_16bit.png](weld_16bit.png)

![](weld_16bit.png)

License: "Irrevocable, nonexclusive, worldwide copyright license to download, copy, modify, distribute, perform, and use
raw files from Signature Edits for free, including for commercial purposes, without permission from or attributing the
photographer or Signature Edits."

Source: Picture from https://www.signatureedits.com/free-raw-photos/, rescaled, modified color balance and converted
with GIMP+Darktable to 16b PNG, metadata removed with `exiftool -All=`.

#### File [weld_sato_12B_8B_q0.avif](weld_sato_12B_8B_q0.avif)

![](weld_sato_12B_8B_q0.avif)

License: Same as for `weld_16bit.png`.

Source: `weld_16bit.png` encoded with `AVIF_SAMPLE_TRANSFORM_BIT_DEPTH_EXTENSION_12B_8B_OVERLAP_4B` at quality 0 and
fastest effort.

## Metadata

The structure can be displayed using `exiv2 -pS <file>`.

### File [dog_exif_extended_xmp_icc.jpg](dog_exif_extended_xmp_icc.jpg)

![](dog_exif_extended_xmp_icc.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Personal photo.

| address | marker      | length | data                                         |
|--------:|-------------|-------:|----------------------------------------------|
|       0 | 0xffd8 SOI  |        |                                              |
|       2 | 0xffe1 APP1 |    884 | `Exif..II*......................`            |
|     888 | 0xffe1 APP1 |    353 | `http://ns.adobe.com/xap/1.0/.<x:`           |
|    1243 | 0xffe1 APP1 |  32417 | `http://ns.adobe.com/xmp/extensio`           |
|   33662 | 0xffe0 APP0 |     16 | `JFIF.........`                              |
|         |             |        | ...                                          |
|   33818 | 0xffe2 APP2 |    612 | `ICC_PROFILE......T........mntrRG chunk 1/1` |
|         |             |        | ...                                          |

### File [paris_exif_xmp_icc.jpg](paris_exif_xmp_icc.jpg)

![](paris_exif_xmp_icc.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Personal photo edited with Gimp 2.10.

| address | marker      | length | data                                         |
|--------:|-------------|-------:|----------------------------------------------|
|       0 | 0xffd8 SOI  |        |                                              |
|       2 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                              |
|      20 | 0xffe1 APP1 |   1134 | `Exif..II*......................`            |
|    1156 | 0xffe1 APP1 |   3929 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|    5087 | 0xffe2 APP2 |    612 | `ICC_PROFILE......T........mntrRG chunk 1/1` |
|         |             |        | ...                                          |

### File [paris_exif_xmp_modified_icc.jpg](paris_exif_xmp_modified_icc.jpg)

![](paris_exif_xmp_modified_icc.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Same as paris_exif_xmp_icc.jpg but edited to have libpng report 'PCS illuminant is not D50'
(the byte at position 0x1440 was changed from 0x2D to 0x2C).

### File [paris_extended_xmp.jpg](paris_extended_xmp.jpg)

![](paris_extended_xmp.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Metadata was extracted from `paris_exif_xmp_icc.jpg` with
`exiftool -tagsfromfile paris_exif_xmp_icc.jpg paris_exif_xmp_icc.xmp`. The text of the first book of
[De finibus bonorum et malorum](https://en.wikipedia.org/wiki/De_finibus_bonorum_et_malorum) was manually inserted in
that file under the tag `xmp:Label` and the second book under the tag `xmp:Nickname` (any `<` or `>` removed to avoid
conflicts with XMP). The file was reconstructed with
`exiftool -tagsfromfile paris_exif_xmp_icc.xmp -Exif= -icc_profile= paris_exif_xmp_icc.jpg -o paris_extended_xmp.jpg`.
The goal is to have a large XMP blob so that it can only be stored as multiple extended XMP chunks.

|  address | marker      | length | data                             |
|---------:|-------------|-------:|----------------------------------|
|        0 | 0xffd8 SOI  |        |                                  |
|        2 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                  |
|       20 | 0xffe1 APP1 |   5531 | http://ns.adobe.com/xap/1.0/.<?x |
|     5553 | 0xffe1 APP1 |  65535 | http://ns.adobe.com/xmp/extensio |
|    71090 | 0xffe1 APP1 |  65535 | http://ns.adobe.com/xmp/extensio |
|   136627 | 0xffe1 APP1 |   4791 | http://ns.adobe.com/xmp/extensio |
|          |             |        | ...                              |

### File [paris_xmp_trailing_null.jpg](paris_xmp_trailing_null.jpg)

![](paris_xmp_trailing_null.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `paris_exif_xmp_icc.jpg` loaded with `avifReadImage()`, stripped of ICC and Exif, a zero byte appended to XMP,
then written with `avifJPEGWrite()` with quality 0 (without calling `avifImageFixXMP()`).

| address | marker      | length | data                                         |
|--------:|-------------|-------:|----------------------------------------------|
|       0 | 0xffd8 SOI  |        |                                              |
|       2 | 0xffe0 APP0 |     16 | `JFIF.........`                              |
|      20 | 0xffe1 APP1 |   3930 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|         |             |        | ...                                          |

### File [paris_icc_exif_xmp.png](paris_icc_exif_xmp.png)

![](paris_icc_exif_xmp.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `paris_exif_xmp_icc.jpg` loaded with `avifReadImage()` then written with `avifPNGWrite()` (modified to output
metadata this way).

| address | marker | length | data                             |
|--------:|--------|-------:|----------------------------------|
|       8 | IHDR   |     13 |                                  |
|      33 | iCCP   |    386 | `libavif..(.u..+DQ..?3...E.....` |
|     431 | zTXt   |    631 | `Raw profile type exif..H...[..` |
|    1074 | zTXt   |   1076 | `Raw profile type xmp..X..YQ..8` |
|    2162 | IDAT   |        | ...                              |
|  160456 | IEND   |      0 |                                  |

### File [paris_icc_exif_xmp_at_end.png](paris_icc_exif_xmp_at_end.png)

![](paris_icc_exif_xmp_at_end.png)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `paris_exif_xmp_icc.jpg` loaded with `avifReadImage()` then written with `avifPNGWrite()` (modified to output
metadata this way).

| address | marker | length | data                             |
|--------:|--------|-------:|----------------------------------|
|       8 | IHDR   |     13 |                                  |
|      33 | iCCP   |    386 | `libavif..(.u..+DQ..?3...E.....` |
|    2162 | IDAT   |        | ...                              |
|  151474 | eXIf   |   1126 | `II*..........................`  |
|  152612 | tEXt   |   7832 | `Raw profile type xmp..XMP.0000` |
|  160456 | IEND   |      0 |                                  |

### File [paris_exif_orientation_5.jpg](paris_exif_orientation_5.jpg)

![](paris_exif_orientation_5.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `paris_exif_xmp_icc.jpg` stripped of all metadata with `exiftool -all=` and Exif orientation added
with `exiv2 -k -M "set Exif.Image.Orientation 5"`

| address | marker      |  length | data                                 |
|--------:|-------------|--------:|--------------------------------------|
|       0 | 0xffd8 SOI  |         |                                      |
|       2 | 0xffe1 APP1 |      34 | `Exif..II*......................`    |
|         |             |         | ...                                  |

### File [paris_icc_exif_xmp.avif](paris_icc_exif_xmp.avif)

![](paris_icc_exif_xmp.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Encoded from `paris_icc_exif_xmp.png` using `avifenc -s 10` at commit ed52c1b.

### File [ffffcc-gamma1.6.png](ffffcc-gamma1.6.png)

![](ffffcc-gamma1.6.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/colorcube/colorcube-pngs-gamma16.html.

It's a color image tagged as gamma 1.6.

### File [ffffcc-gamma1.6.png](ffffcc-gamma1.6.png)

![](ffffcc-gamma2.2.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/colorcube/colorcube-pngs-gamma22.html.

It's a color image tagged as gamma 2.2.

### File [ffffff-gamma1.6.png](ffffff-gamma1.6.png)

![](ffffff-gamma1.6.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/colorcube/colorcube-pngs-gamma16.html.

It's a grayscale image tagged as gamma 1.6.

### File [ffffff-gamma2.2.png](ffffff-gamma2.2.png)

![](ffffff-gamma2.2.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/colorcube/colorcube-pngs-gamma22.html.

It's a grayscale image tagged as gamma 2.2.

### File [ffffcc-srgb.png](ffffcc-srgb.png)

![](ffffcc-srgb.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/colorcube/colorcube-pngs-sRGB.html.

It's a color image tagged as sRGB.

### File [ArcTriomphe-cHRM-orig.png](ArcTriomphe-cHRM-orig.png)

![](ArcTriomphe-cHRM-orig.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Attribution: Greg Roelofs

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/png-colortest.html.

It's a image tagged as gamma 2.2 and BT709 primaries.

### File [ArcTriomphe-cHRM-red-green-swap.png](ArcTriomphe-cHRM-red-green-swap.png)

![](ArcTriomphe-cHRM-red-green-swap.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Attribution: Greg Roelofs

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/png-colortest.html.

It's a image tagged as gamma 2.2 and BT709 primaries but red and green swapped.

### File [ArcTriomphe-cHRM-red-green-swap-reference.png](ArcTriomphe-cHRM-red-green-swap-reference.png)

![](ArcTriomphe-cHRM-red-green-swap-reference.png)

License: Creative Commons Attribution-NonCommercial 2.5 License

Attribution: Greg Roelofs

Source: Picture from the libpng test page
http://www.libpng.org/pub/png/png-colortest.html.

It's [ArcTriomphe-cHRM-red-green-swap.png](ArcTriomphe-cHRM-red-green-swap.png)
converted into sRGB colorspace by Chrome using "Capture Node Screenshot"
in DevTools.

### File [arc_triomphe_extent1000_nullbyte_extent1310.avif](arc_triomphe_extent1000_nullbyte_extent1310.avif)

![](arc_triomphe_extent1000_nullbyte_extent1310.avif)

License: Creative Commons Attribution-NonCommercial 2.5 License

Attribution: Greg Roelofs

Source: `ArcTriomphe-cHRM-orig.png` compressed with
`avifenc --ignore-exif --ignore-xmp --ignore-icc`.

The file is manually edited. The `iloc` property of the primary item has two
extents. A null byte was inserted between the two extents in the `mdat` payload.

## Grid

### File [sofa_grid1x5_420.avif](sofa_grid1x5_420.avif)

![](sofa_grid1x5_420.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Personal photo converted with `avifenc --grid 1x5 --yuv 420` at
commit [632d131](https://github.com/AOMediaCodec/libavif/commit/632d13188f9b7faa40f20d870e792174b8b5b8e6).

### File [sofa_grid1x5_420_dimg_repeat.avif](sofa_grid1x5_420_dimg_repeat.avif)

![](sofa_grid1x5_420_dimg_repeat.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `sofa_grid1x5_420.avif` with manually edited `dimg` associations
2,3,4,5,5 instead of 2,3,4,5,6 (invalid file).

### File [sofa_grid1x5_420_reversed_dimg_order.avif](sofa_grid1x5_420_reversed_dimg_order.avif)

![](sofa_grid1x5_420_reversed_dimg_order.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `sofa_grid1x5_420.avif` manually edited so that the `dimg` order is
6,5,4,3,2 instead of 2,3,4,5,6.

### File [color_grid_alpha_nogrid.avif](color_grid_alpha_nogrid.avif)

![](color_grid_alpha_nogrid.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: https://github.com/AOMediaCodec/libavif/issues/1203

The color planes are arranged as a 1x2 grid item. The alpha plane items are
tagged as `dimg` for each color plane item (without a `grid` item on its own).
This is allowed per the specification. libavif should decode such files
correctly (i.e.) it should report them as files with alpha channel.

Box structure of the items in this file:

```
[primary item grid]
   ^       ^
   |dimg   |dimg
   |       |
[color] [color]
   ^       ^
   |auxl   |auxl
   |       |
[alpha] [alpha]
```

### File [color_grid_alpha_grid_tile_shared_in_dimg.avif](color_grid_alpha_grid_tile_shared_in_dimg.avif)

![](color_grid_alpha_grid_tile_shared_in_dimg.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Same as `color_grid_alpha_nogrid.avif`

The color and alpha planes are arranged as 2x2 grid items. The color `dimg`
associations are manually edited from 2,3,4,5 to 2,3,4,A. The item with ID 0xA
is an item used in two grids.

### File [alpha_noispe.avif](alpha_noispe.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Same pixels as `color_grid_alpha_nogrid.avif` encoded with
[`cavif-rs`](https://github.com/kornelski/cavif-rs) with the
[alpha `ispe` fix](https://github.com/kornelski/avif-serialize/pull/4) removed.

## Gain Maps

### File [paris_exif_xmp_gainmap_littleendian.jpg](paris_exif_xmp_gainmap_littleendian.jpg)

![](paris_exif_xmp_gainmap_littleendian.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Based on `paris_exif_xmp_icc.jpg` with ICC stripped out and a gain map added
using Photoshop.

Contains a MPF (Multi-Picture Format) segment with metadata pointing to a second image
at offset 33487. The MPF metadata is in little endian order, as signaled by the four bytes
'II*\0'.

| address | marker      | length | data                                         |
|--------:|-------------|-------:|----------------------------------------------|
|       0 | 0xffd8 SOI  |        |                                              |
|       2 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                              |
|      20 | 0xffe1 APP1 |    838 | `Exif..II*......................`            |
|    1156 | 0xffe1 APP1 |   2808 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|    3670 | 0xffe1 APP1 |    392 | `http://ns.adobe.com/xmp/extension/`         |
|    4064 | 0xffe2 APP2 |     88 | `MPF..II*.....                   `           |
|         |             |        | ...                                          |
|   33487 | 0xffd8 SOI  |        |                                              |
|   33489 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                              |
|   33507 | 0xffe1 APP1 |    571 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|         |             |        | ...                                          |

### File [paris_exif_xmp_gainmap_bigendian.jpg](paris_exif_xmp_gainmap_bigendian.jpg)

![](paris_exif_xmp_gainmap_bigendian.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Same as `paris_exif_xmp_gainmap_littleendian.jpg` but manually edited with
a hex editor to make the MPF metadata big endian, as signaled by the four bytes
'MM\0*'.

| address | marker      | length | data                                         |
|--------:|-------------|-------:|----------------------------------------------|
|       0 | 0xffd8 SOI  |        |                                              |
|       2 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                              |
|      20 | 0xffe1 APP1 |    838 | `Exif..II*......................`            |
|    1156 | 0xffe1 APP1 |   2808 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|    3670 | 0xffe1 APP1 |    392 | `http://ns.adobe.com/xmp/extension/`         |
|    4064 | 0xffe2 APP2 |     88 | `MPF..MM.*....                   `           |
|         |             |        | ...                                          |
|   33487 | 0xffd8 SOI  |        |                                              |
|   33489 | 0xffe0 APP0 |     16 | `JFIF.....,.,.`                              |
|   33507 | 0xffe1 APP1 |    571 | `http://ns.adobe.com/xap/1.0/.<?x`           |
|         |             |        | ...                                          |

### File [apple_gainmap_old.jpg](apple_gainmap_old.jpg)

![](apple_gainmap_old.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Personal photo taken on an iPhone with an older OS, resized using Preview
to save space. The XMP does not contain the HDR headroom, instead it has to be
read from Exif metadata.

### File [apple_gainmap_new.jpg](apple_gainmap_new.jpg)

![](apple_gainmap_new.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Same as apple_gainmap_old.jpg, but with XMP data manually copied from a
picture taken on a more recent iPhone. The difference is that the XMP metadata
contains the <HDRGainMap:HDRGainMapHeadroom> element.

### File [paris_exif_xmp_icc_gainmap_bigendian.jpg](paris_exif_xmp_icc_gainmap_bigendian.jpg)

![](paris_exif_xmp_icc_gainmap_bigendian.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: same as paris_exif_xmp_gainmap_bigendian.jpg but with a DCI-P3 ICC profile added
using exiftool:

```
cp paris_exif_xmp_gainmap_bigendian.jpg paris_exif_xmp_icc_gainmap_bigendian.jpg
exiftool -icc_profile -b path/to/some_image_with_a_p3_profile.jpg > p3.icc
exiftool "-icc_profile<=p3.icc" paris_exif_xmp_icc_gainmap_bigendian.jpg
```

### File [color_grid_gainmap_different_grid.avif](color_grid_gainmap_different_grid.avif)

![](color_grid_gainmap_different_grid.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/`

Contains a 4x3 color grid, a 4x3 alpha grid, and a 2x2 gain map grid.

### File [color_nogrid_alpha_nogrid_gainmap_grid.avif](color_nogrid_alpha_nogrid_gainmap_grid.avif)

![](color_nogrid_alpha_nogrid_gainmap_grid.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a single color image, single alpha image, and a 2x2 gain map grid.

### File [color_grid_alpha_grid_gainmap_nogrid.avif](color_grid_alpha_grid_gainmap_nogrid.avif)

![](color_grid_alpha_grid_gainmap_nogrid.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a 4x3 color grid, a 4x3 alpha grid, and a single gain map image.

### File [unsupported_gainmap_version.avif](unsupported_gainmap_version.avif)

![](unsupported_gainmap_version.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a gain map with the `version` field set to 99 in the tmap box.
Fields `minimum_version` and `writer_version` are 0.
Decoders should ignore the gain map since the `version` is unsupported.

### File [unsupported_gainmap_minimum_version.avif](unsupported_gainmap_minimum_version.avif)

![](unsupported_gainmap_minimum_version.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a gain map with the `minimum_version` and `writer_version` fields set to 99 in the tmap box.
Field `version` is 0.
Decoders should ignore the gain map since the `minimum_version` is unsupported.

### File [unsupported_gainmap_writer_version_with_extra_bytes.avif](unsupported_gainmap_writer_version_with_extra_bytes.avif)

![](unsupported_gainmap_writer_version_with_extra_bytes.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a gain map with the `writer_version` field set to 99 in the tmap box,
and some extra bytes at the end of the gain map metadata.
`version` and `minimum_version` are 0.
Decoders should decode this image including the gain map. The extra bytes should not
cause issues since the `writer_version` is unsupported.

### File [supported_gainmap_writer_version_with_extra_bytes.avif](supported_gainmap_writer_version_with_extra_bytes.avif)

![](supported_gainmap_writer_version_with_extra_bytes.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/weirdgainmaps
by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/` 

Contains a gain map with some extra unexpected bytes at the end of the gain map metadata.
`version`, `minimum_version` and `writer_version` are 0.
Because of the extra bytes despite a supported `writer_version`, this file should be treated as invalid.

### File [seine_hdr_srgb.avif](seine_hdr_srgb.avif)

![](seine_hdr_srgb.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : created from a personal photo, converted to HDR using Photoshop, see
https://helpx.adobe.com/camera-raw/using/hdr-output.html and
https://gregbenzphotography.com/hdr-images/jpg-hdr-gain-maps-in-adobe-camera-raw/

See also sources/seine.psd

HDR image using the PQ transfer curve. Contains an irrelevant gain map in
[Adobe's format](https://helpx.adobe.com/camera-raw/using/gain-map.html) that is not recognized by
libavif and ignored by the tests.

### File [seine_sdr_gainmap_srgb.jpg](seine_sdr_gainmap_srgb.jpg)

![](seine_sdr_gainmap_srgb.jpg)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : created from a personal photo, converted to HDR using Photoshop, then saved as JPEG+gainmap,
see https://helpx.adobe.com/camera-raw/using/hdr-output.html and
https://gregbenzphotography.com/hdr-images/jpg-hdr-gain-maps-in-adobe-camera-raw/

### File [seine_hdr_rec2020.avif](seine_hdr_rec2020.avif)

![](seine_hdr_rec2020.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : same as seine_hdr_srgb but saved with the Rec. 2020 color space in Photoshop (Camera Raw 16.0.1.1683).

HDR image using the PQ transfer curve and Rec. 2020 color space. Contains an irrelevant gain map in
[Adobe's format](https://helpx.adobe.com/camera-raw/using/gain-map.html) that is not recognized by
libavif and ignored by the tests.

### File [seine_sdr_gainmap_srgb.avif](seine_sdr_gainmap_srgb.avif)

![](seine_sdr_gainmap_srgb.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : created from `seine_sdr_gainmap_srgb.jpg` converted to avif with avifenc built
with AVIF_LIBXML2 enabled, then:

```
# from libavif/mybuilddir/
./avifenc ../tests/data/seine_sdr_gainmap_srgb.jpg ../tests/data/seine_sdr_gainmap_srgb.avif --qcolor 90 --qgain-map 90 --ignore-icc
```

SDR image with a gain map to allow tone mapping to HDR.

### File [seine_sdr_gainmap_notmapbrand.avif](seine_sdr_gainmap_notmapbrand.avif)

![](seine_sdr_gainmap_notmapbrand.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : same as seine_sdr_gainmap_srgb.avif before commit 10b7232

An image with a `tmap` item (i.e. a gain map) but no 'tmap' brand in the `ftyp` box.
The gain map should be ignored by the decoder since the `tmap` brand is missing.

### File [seine_hdr_gainmap_wrongaltr.avif](seine_hdr_gainmap_wrongaltr.avif)

![](seine_hdr_gainmap_wrongaltr.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : same as seine_hdr_gainmap_wrongaltr.avif but edited with a hex editor
to swap the two entity ids inside the 'altr' box.

An image with a `tmap` item (i.e. a gain map) but the `altr` box does not show
it as being preferred over the primary image item so it should be ignored.

### File [seine_sdr_gainmap_gammazero.avif](seine_sdr_gainmap_gammazero.avif)

![](seine_sdr_gainmap_gammazero.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : same as seine_sdr_gainmap_srgb.avif generated with a modified avifenc that
writes 0 instead of the gain map gamma numerator.

An image with a gain map where the gain map gamma value is zero (invalid).


### File [seine_sdr_gainmap_big_srgb.avif](seine_sdr_gainmap_big_srgb.avif)

![](seine_sdr_gainmap_big_srgb.avif)

Source : generated by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/`
after changing `kUpdateTestImages` to true in the `avifgainmaptest.cc`.

SDR image with a gain map to allow tone mapping to HDR. The gain map's width and height are doubled compared to the base image.
This is a valid but atypical image for testing. Typically, the gain map would be either the same size or smaller as the base image.

### File [seine_hdr_gainmap_srgb.avif](seine_hdr_gainmap_srgb.avif)

![](seine_hdr_gainmap_srgb.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : generated by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/`
after changing `kUpdateTestImages` to true in the `avifgainmaptest.cc`.

HDR image with a gain map to allow tone mapping to SDR.

### File [seine_hdr_gainmap_small_srgb.avif](seine_hdr_gainmap_small_srgb.avif)

![](seine_hdr_gainmap_small_srgb.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source : generated by running `./tests/avifgainmaptest --gtest_filter=GainMapTest.CreateGainMapImages ../tests/data/`
after changing `kUpdateTestImages` to true in the `avifgainmaptest.cc`.

SDR image with a gain map to allow tone mapping to HDR. The gain map's width and height are halved compared to the base image.

## Files colors*_hdr_*.avif and colors*_sdr_srgb.avif

![](colors_wcg_hdr_rec2020.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

SDR and HDR (PQ) AVIF images in various colorspaces.
The files with 'wcg' (wide color gamut) in their name have colors outside of the sRGB color space.
The files without 'wcg' in their name have sRGB colors, but expressed in various color spaces.

The files with 'text' in their name have text on them. They are not currently used in tests but can be used for manual
testing of gain maps (e.g. with `avifgainmaputil combine ...`), as they make it easy to see which version
the browser is displaying.

HDR/wide color gamut images should be viewed on an HDR display, such as on a M1+ Mac Book Pro.

Source : created with Photoshop 25.1.0 (Camera Raw 16.0.1.1683), see sources/colors.psd and
https://helpx.adobe.com/camera-raw/using/hdr-output.html,
https://gregbenzphotography.com/hdr-images/jpg-hdr-gain-maps-in-adobe-camera-raw/

Basic process: create a 32bit image, export it as png for the SDR version.
Then open the Camera Raw filter (Filter > Camera Raw Filter...), click HDR at the top right, and drag
the histogram towards the right to create brighter pixels.
Click the save icon on the top right. Select AVIF as output format and check "HDR output" then save.
To create an image with a wider color gamut, choose Edit > Assign Profile... and set the color space
to e.g. BT 2020.

To export more images from sources/colors.psd:
- For SDR, show/hide the layers as desired then export to PNG then convert to avif with avifenc
- For HDR, show/hide the layers as desired then flatten the image, (Layers > Flatten Image), open
  the Camera Raw dialog, and click the save icon on the top right.
- For the wide color gamut version, choose Edit > Assign Profile... and set the color space to
  Rec.ITU-R BT.2020-1

## Idat

These files use the 'idat' box instead of the 'mdat' box to store data.

### File [draw_points_idat.avif](draw_points_idat.avif)

![](draw_points_idat.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/idat
by running `./avifenc -q 100 ../tests/data/draw_points.png ../tests/data/draw_points_idat.avif` 

### File [draw_points_idat_metasize0.avif](draw_points_idat_metasize0.avif)

![](draw_points_idat_metasize0.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/idat
after uncommenting the line under `// uncomment to make meta size zero` and running
`./avifenc -q 100 ../tests/data/draw_points.png ../tests/data/draw_points_idat_metasize0.avif` 

### File [draw_points_idat_progressive.avif](draw_points_idat_progressive.avif)

![](draw_points_idat_progressive.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/idat
by running `./avifenc -q 100 --progressive ../tests/data/draw_points.png ../tests/data/draw_points_idat_progressive.avif` 

### File [draw_points_idat_progressive_metasize0.avif](draw_points_idat_progressive_metasize0.avif)

![](draw_points_idat_progressive_metasize0.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: generated with a modified libavif at https://github.com/maryla-uc/libavif/tree/idat
after uncommenting the line under `// uncomment to make meta size zero` and running
`./avifenc -q 100 --progressive ../tests/data/draw_points.png ../tests/data/draw_points_idat_progressive_metasize0.avif` 

## Animated Images

### File [colors-animated-8bpc.avif](colors-animated-8bpc.avif)

![](colors-animated-8bpc.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Random colors generated with ffmpeg.

An animated AVIF image file with the following attributes:
* Width: 150
* Height: 150
* Alpha present: No
* YUV Format: 420
* Repetition Count: 0
* Frame count: 5

### File [colors-animated-8bpc-audio.avif](colors-animated-8bpc-audio.avif)

![](colors-animated-8bpc-audio.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Same as `colors-animated-8bpc.avif` but with an audio track added using MP4Box:

`MP4Box -add audio.aac colors-animated-8bpc-audio.avif`

audio.aac was recorded with QuickTime and converted/truncated to the same length as the
image sequence with ffmpeg:

`ffmpeg -i audio.m4a -t 0.17 audio.aac`

### File [colors-animated-8bpc-alpha-exif-xmp.avif](colors-animated-8bpc-alpha-exif-xmp.avif)

![](colors-animated-8bpc-alpha-exif-xmp.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `colors-animated-8bpc.avif` but translucent and with the Exif/XMP chunks of
`paris_exif_xmp_icc.jpg`. The repetition is infinite.

### File [colors-animated-8bpc-depth-exif-xmp.avif](colors-animated-8bpc-depth-exif-xmp.avif)

![](colors-animated-8bpc-depth-exif-xmp.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: `colors-animated-8bpc-alpha-exif-xmp.avif` but with the alpha URI manually
changed to depth using a hex editor.

### File [colors-animated-12bpc-keyframes-0-2-3.avif](colors-animated-12bpc-keyframes-0-2-3.avif)

![](colors-animated-12bpc-keyframes-0-2-3.avif)

License: [same as libavif](https://github.com/AOMediaCodec/libavif/blob/main/LICENSE)

Source: Random frames generated with libavif.

### File [webp_logo_animated.y4m](webp_logo_animated.y4m)

![](webp_logo_animated.y4m)

License: [Creative Commons Attribution 4.0 International](https://creativecommons.org/licenses/by/4.0/),
[Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0)

Attribution: Google LLC

Source: https://en.wikipedia.org/wiki/File:WebPLogo.svg with text stripped and
animated effects.

# Other Test Files

### File [sRGB2014.icc](sRGB2014.icc)

License: [Copyright International Color Consortium, 2015](https://www.color.org/profiles2.xalter#license)

Source: https://www.color.org/srgbprofiles.xalter#v2