Prepare a landing page video

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

Time

35s

New tokens

14.1k

Total input

155.2k

Output tokens

1.1k

Commands

14

Failed

0

Trace

1. I’ll inspect `movie.mp4` and the available media conversion tools, then create `hero.mp4` and its first-frame `poster.jpg` in this directory.

2. command -v ffmpeg; command -v ffprobe; command -v deft
   output

   /opt/homebrew/bin/ffmpeg
   /opt/homebrew/bin/ffprobe
   deft

3. pwd && rg --files -g 'movie.mp4' -g 'SKILL.md' | head -40
   output

   movie.mp4

4. I found `movie.mp4` and have ffmpeg available. The media workflow skill says to use `deft` for video conversion, so I’m checking its instructions and will use it if it supports the needed size and silence constraints.

5. cat .agents/skills/deft/SKILL.md
   output

   ---
   name: deft
   description: "Use deft instead of writing a script for file jobs: PDF merge/split/compress/watermark, image resize/convert/compress, video and audio trim/convert/compress, spreadsheets, Markdown to PDF/HTML, and YouTube downloads and subtitles."
   ---
   
   # 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, filters, montage, OCR
   - `video`: Trim, crop, speed, convert, compress, GIF, frames (ffmpeg)
   - `audio`: Convert, trim, merge, fade, speed, tag, normalize (ffmpeg)
   - `doc`: Word/ODT/RTF: to text, Markdown, HTML, PDF; find and replace
   - `slides`: PowerPoint: extract text, Markdown outline, PDF handout
   - `data`: JSON/YAML/TOML/XML: convert, query with jq syntax, merge, diff
   - `sheet`: Excel/CSV/ODS tables: filter, sort, join, pivot, convert
   - `md`: Markdown to PDF, HTML, Word, EPUB; table of contents
   - `html`: HTML to Markdown, text, Word, PDF; screenshots
   - `epub`: E-books: info, to text, Markdown and PDF
   - `email`: EML files: headers, text, attachments
   - `contact`: VCF address books: to and from CSV
   - `calendar`: ICS calendars: to and from CSV
   - `gps`: GPX and KML tracks: convert, distance and time
   - `youtube`: Info, download, audio, subtitles, thumbnail (yt-dlp)
   - `file`: Any file: hash, duplicates, batch rename, base64, encoding
   - `qr`: Cre
   … 728 more characters

6. deft video
   output

   deft video - commands (input -> output)
     info               video -> report      Duration, size, frame rate, codecs
     add-audio          video -> video       Replace or mix the soundtrack: --audio song.mp3
     add-subtitles      video -> video       Add subtitles: burned into the picture, or --soft
     chunk              video -> video...    Cut into equal parts: --length 10:00
     compress           video -> mp4         Smaller file: --level, --target-size, --max-height
     convert            video|gif -> video   Change container and codec: --to mp4|webm|mov|mkv
     crop               video -> video       Cut a region: --box or --aspect 1:1
     download           url -> video         Save a video: --resolution 720p, --to mp4|webm|mkv [net]
     extract-audio      video -> audio       Save the soundtrack: --to mp3|m4a|wav|flac|ogg
     extract-subtitles  video -> srt|vtt     Save an embedded subtitle track: --to srt|vtt
     fade               video -> video       Fade: --fade-in 1 --fade-out 2
     frames             video -> png|jpg...  Save frames as images: --fps 1 or --at 0:05,0:10
     from-images        image... -> video    Slideshow: --duration, --fps, --audio
     merge              video... -> mp4      Join videos; --transition fades
     mute               video -> video       Remove the audio track
     pad                video -> video       Fit into a frame with bars: --size 1080x1920
     repeat             video -> video       Repeat a video: --count 3 plays it three times
     resize             vid
   … 891 more characters

7. ffprobe -v error -show_entries format=duration,size -show_entries stream=codec_name,width,height,avg_frame_rate -of json movie.mp4
   output

   {
       "programs": [
   
       ],
       "stream_groups": [
   
       ],
       "streams": [
           {
               "codec_name": "h264",
               "width": 1280,
               "height": 720,
               "avg_frame_rate": "30/1"
           },
           {
               "codec_name": "aac",
               "avg_frame_rate": "0/0"
           }
       ],
       "format": {
           "duration": "10.000000",
           "size": "1137569"
       }
   }

8. deft video frames --help
   output

   deft video frames - Save frames as images: --fps 1 or --at 0:05,0:10
   
   Usage: deft video frames <video>... [-o <dir>] [options]
   In: video (each handled separately)   Out: png|jpg files in <name>-frames/
   
   Options:
     --fps <number>               Frames per second
     --interval <time>            Time between frames, such as 2 or 0:30
     --from <time>                Start time for --fps or --interval (default 0)
     --at <times>                 Exact times
     --to <png|jpg>               Image format (default jpg)
   Common: -o --force --dry-run --json -j   (deft help common)
   
   Examples:
     deft video frames clip.mp4 --at 0:01 -o shots/
     deft video frames clip.mp4 --fps 1 --to png -o frames/
     deft video frames clip.mp4 --from 1 --interval 2 -o frames/
   
   Result fields: files
   Needs: ffmpeg, ffprobe

9. deft video mute --help
   output

   deft video mute - Remove the audio track
   
   Usage: deft video mute <video>... [-o <video|dir>] [options]
   In: video (each handled separately)   Out: video (default <name>.muted.<ext>)
   Common: -o --force --dry-run --json -j   (deft help common)
   
   Examples:
     deft video mute clip.mp4 -o silent.mp4
   Needs: ffmpeg, ffprobe

10. deft video compress --help
    output

    deft video compress - Smaller file: --level, --target-size, --max-height
    
    Usage: deft video compress <video>... [-o <mp4|dir>] [options]
    In: video (each handled separately)   Out: mp4 (default <name>.compressed.<ext>)
    
    Options:
      --level <light|balanced|strong>
          How hard to compress (default balanced)
      --target-size <bytes>        Aim for this file size
      --max-height <n>             Scale down to this height, e.g. 720
    Common: -o --force --dry-run --json -j   (deft help common)
    
    Examples:
      deft video compress clip.mp4 --level strong -o small.mp4
      deft video compress clip.mp4 --target-size 500KB --max-height 240 -o tiny.mp4
    
    Result fields: bytes_before, bytes_after, ratio
    Needs: ffmpeg, ffprobe
    Errors: TARGET_UNREACHABLE

11. The source is 10 seconds at 1280×720 with audio, and it’s about 1.14 MB. I’ll remove the audio first, compress to a 950,000-byte target while capping height at 720, then extract the first frame from the finished video.

12. deft video mute movie.mp4 -o <tmp>
    output

    ok video.mute movie.mp4 -> <tmp>  947KB  0.07s

13. deft video compress <tmp> --target-size 950000 --max-height 720 -o hero.mp4
    output

    ok video.compress <tmp> -> hero.mp4  947KB -> 901KB (-5%)  4.16s

14. deft video thumbnail --help
    output

    deft video thumbnail - One frame as an image, or --at a time
    
    Usage: deft video thumbnail <video>... [-o <image|dir>] [options]
    In: video (each handled separately)   Out: image (default <name>.thumbnail.<ext>)
    
    Options:
      --at <times>                 Time of the frame (default: chosen by ffmpeg)
      --size <size>                Scale, e.g. 320x or 50%
    Common: -o --force --dry-run --json -j   (deft help common)
    
    Examples:
      deft video thumbnail clip.mp4 -o cover.jpg
      deft video thumbnail clip.mp4 --at 0:01 --size 160x -o small.png
    Needs: ffmpeg, ffprobe

15. deft video thumbnail hero.mp4 --at 0 -o poster.jpg
    output

    ok video.thumbnail hero.mp4 -> poster.jpg  102KB  0.15s

16. ls -l hero.mp4 poster.jpg
    output

    -rw-r--r--@ 1 user  staff  922382 Nov  6 16:43 hero.mp4
    -rw-r--r--@ 1 user  staff  104076 Nov  6 16:43 poster.jpg

17. ffprobe -v error -show_entries format=size,duration -show_entries stream=codec_type,codec_name,width,height -of json hero.mp4
    output

    {
        "programs": [
    
        ],
        "stream_groups": [
    
        ],
        "streams": [
            {
                "codec_name": "h264",
                "codec_type": "video",
                "width": 1280,
                "height": 720
            }
        ],
        "format": {
            "duration": "10.000000",
            "size": "922382"
        }
    }

18. Created both files in the current directory: - [hero.mp4](hero.mp4) — silent, 922,382 bytes, 1280×720. - [poster.jpg](poster.jpg) — first frame from the finished video.

Output

poster.jpg 101.6 KB · 1280x720

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

Time

27s

New tokens

12.1k

Total input

78.3k

Output tokens

1.2k

Commands

0

Failed

0

Trace

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; 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

poster.jpg 201.4 KB · 1280x720