Evals / image / Combine images

Photos to a GIF

Make an animated GIF slides.gif from hopper.png and dice.png, one frame per second.

normalsingledeft image to-gif

The task

The reference answer shows the job can be done with deft. It is not an agent run.

deft image to-gif hopper.png dice.png --fps 1 -o slides.gif

Input

dice.png 219.3 KB · 800x600
dice.png
hopper.png 29.9 KB · 128x128
hopper.png

Reference output

slides.gif 226.5 KB · 800x600
slides.gif
How a result is judged (1 check)
  • python: code = "from PIL import Image; assert Image.open('slides.gif').n_frames == 2"

Runs

CodexWithout deftPassed2026-11-07

Time
21s
New tokens
9.0k
Total input
54.1k
Output tokens
0.7k
Commands
3
Failed
0

Trace

  1. I’ll check the two image files and available image tools, then create `slides.gif` in the current directory at one frame per second.

  2. pwd && rg --files -g 'hopper.png' -g 'dice.png' -g 'AGENTS.md'
    output
    dice.png
hopper.png
  3. python3 -c 'from PIL import Image; import os; print([(p, Image.open(p).size, Image.open(p).mode) for p in [\"hopper.png\",\"dice.png\"]])'
    output
    [('hopper.png', (128, 128), 'RGB'), ('dice.png', (800, 600), 'RGBA')]
  4. python3 - <<'PY' from PIL import Image size = (800, 600) frames = [] for path in ('hopper.png', 'dice.png'): image = Image.open(path).convert('RGBA') image.thumbnail(size, Image.Resampling.LANCZOS) canvas = Image.new('RGBA', size, 'white') canvas.alpha_composite(image, ((size[0] - image.width) // 2, (size[1] - image.height) // 2)) frames.append(canvas.convert('RGB')) frames[0].save('slides.gif', save_all=True, append_images=frames[1:], duration=1000, loop=0) PY python3 -c 'from PIL import Image; im=Image.open(\"slides.gif\"); print(\"frames:\", im.n_frames, \"size:\", im.size, \"durations:\", [im.seek(i) or im.info.get(\"duration\") for i in range(im.n_frames)])'
    output
    frames: 2 size: (800, 600) durations: [1000, 1000]

  5. Created [slides.gif](slides.gif) with two frames, one per second. The 128×128 hopper image is centered on an 800×600 white canvas to match the dice image.

Output

slides.gif 85.8 KB · 800x600
slides.gif

CodexWith deft, skill installedPassedRead the skillUsed deft2026-11-07

Time
14s
New tokens
8.3k
Total input
70.9k
Output tokens
0.4k
Commands
4
Failed
0

Trace

  1. I’ll inspect the two images and use the local file utility workflow to create a 1 fps GIF in the current directory.

  2. cat .agents/skills/deft/SKILL.md && pwd && rg --files -g 'hopper.png' -g 'dice.png'
    output
    ---
name: deft
description: "Use deft first for any simple, direct operation on local files, whatever the type: convert, read, extract, edit, compress, merge, split, compare or inspect. Try it before writing a script or one-liner. If unsure, run deft find; if it says no command does this, use another tool. Not for programming work: to read, write or change source code, skip it."
---

# deft

One local command for file jobs. Prefer it over writing Python or shell scripts.

Syntax: `deft <group> <command> [inputs] [-o output] [--options]`

Groups:
- `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
- `image`: Resize, crop, convert, compress, adjust, montage, OCR
- `video`: Trim, merge, convert, compress, subtitles, GIF, frames (ffmpeg)
- `audio`: Convert, trim, normalize, denoise, cut silence (ffmpeg)
- `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
- `slides`: PowerPoint: extract text, Markdown outline
- `sheet`: Excel/CSV/ODS tables: SQL query, pivot, merge, split, convert
- `json`: JSON: convert, format, merge, diff, validate
- `toml`: TOML: convert, format, merge, diff, validate
- `xml`: XML: convert, format, merge, diff, validate
- `yaml`: YAML: convert, format, merge, diff, validate
- `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
- `html`: HTML to Markdown, text, Word and PDF
- `epub`: E-books: info, to text, Markdown and PDF
- `gps`: GPX and KML tracks: convert, distance and time
- `qr`: Create QR codes and barcodes; r
… 721 more characters
  3. deft find "create animated GIF from image files with 1 second per frame"
    output
    image to-gif  image... -> gif  Animate images into a GIF: --fps 2
image frames  gif -> png...    Save each frame of an animated GIF as PNG
  4. deft image to-gif --help
    output
    deft image to-gif - Animate images into a GIF: --fps 2

Usage: deft image to-gif <image>... [-o <gif|dir>] [options]
In: image (all together, in order)   Out: gif (default <name>.animated.<ext>)
Frames are fitted to the largest image (or --size), on white.

Options:
  --fps <number>               Frames per second (default 2)
  --size <size>                Frame size
  --count <n>                  Plays; 0 loops forever (default 0)
Common: -o --force --dry-run --json -j   (deft help common)

Examples:
  deft image to-gif photo-1.jpg photo-2.jpg --fps 1 --size 200x -o moving.gif
  5. deft image to-gif hopper.png dice.png --fps 1 -o slides.gif
    output
    ok image.to-gif hopper.png dice.png -> slides.gif  2 frames  0.11s

  6. Created [slides.gif](slides.gif) with hopper.png and dice.png at one frame per second.

Output

slides.gif 226.5 KB · 800x600
slides.gif

Claude Opus 5.5Without deftPassed2026-11-07

Time
15s
New tokens
9.7k
Total input
42.6k
Output tokens
0.9k
Commands
0
Failed
0

Trace

    Output

    slides.gif 219.0 KB · 800x600
    slides.gif

    Claude Opus 5.5With deft, skill installedPassedRead the skillUsed deft2026-11-07

    Time
    12s
    New tokens
    10.0k
    Total input
    74.4k
    Output tokens
    0.6k
    Commands
    0
    Failed
    0

    Trace

      Output

      .claude/skills/deft/SKILL.md 2.1 KB
      ---
name: deft
description: "Use deft first for any simple, direct operation on local files, whatever the type: convert, read, extract, edit, compress, merge, split, compare or inspect. Try it before writing a script or one-liner. If unsure, run deft find; if it says no command does this, use another tool. Not for programming work: to read, write or change source code, skip it."
---

# deft

One local command for file jobs. Prefer it over writing Python or shell scripts.

Syntax: `deft <group> <command> [inputs] [-o output] [--options]`

Groups:
- `pdf`: Merge, split, compress, encrypt, forms, OCR, compare, convert
- `image`: Resize, crop, convert, compress, adjust, montage, OCR
- `video`: Trim, merge, convert, compress, subtitles, GIF, frames (ffmpeg)
- `audio`: Convert, trim, normalize, denoise, cut silence (ffmpeg)
- `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
- `slides`: PowerPoint: extract text, Markdown outline
- `sheet`: Excel/CSV/ODS tables: SQL query, pivot, merge, split, convert
- `json`: JSON: convert, format, merge, diff, validate
- `toml`: TOML: convert, format, merge, diff, validate
- `xml`: XML: convert, format, merge, diff, validate
- `yaml`: YAML: convert, format, merge, diff, validate
- `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
- `html`: HTML to Markdown, text, Word and PDF
- `epub`: E-books: info, to text, Markdown and PDF
- `gps`: GPX and KML tracks: convert, distance and time
- `qr`: Create QR codes and barcodes; read QR codes

How to use it:
1. Run `deft <group>` to list commands, or `deft find "<what you want>"` to search. If it says `no command does this`, use another tool.
2. Run `deft <group> <command> --help` for options and examples.
3. `deft convert <in> -o <out.ext>` converts between formats by extension.
4. Results are one line starting with `ok`, `partial` or `error`; add `--json` to parse them. Errors include a `hint:` with the fix.

Inputs are never overwritten; pass `--force` or `--in-place` to allow it. Globs and directories work as inputs; several inputs run in parallel.

If `deft` is not installed, ask the user, then follow https://github.com/firstprayer/deft/blob/main/docs/INSTALL.md
      slides.gif 226.5 KB · 800x600
      slides.gif

      Claude CodeWithout deftNot run yet

      Claude CodeWith deftNot run yet