Convert WebM for compatibility

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

Time

11s

New tokens

7.6k

Total input

56.1k

Output tokens

0.2k

Commands

3

Failed

0

Trace

1. I’ll check the available media tools and convert the file in place.

2. 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

3. deft video convert --help
   output

   deft video convert - Change container and codec: --to mp4|webm|mov|mkv
   Same as: deft convert
   
   Usage: deft video convert <video|gif>... [-o <video|dir>] [options]
   In: video|gif (each handled separately)   Out: video (default <name>.<ext>)
   
   Options:
     --to <mp4|webm|mov|mkv|avi>  Target format (or give -o name.ext)
     --fps <number>               Change the frame rate
   Common: -o --force --dry-run --json -j   (deft help common)
   
   Examples:
     deft video convert clip.mp4 --to webm -o clip.webm
     deft video convert clip.mp4 -o clip.mov
     deft video convert clip.mp4 --fps 5 -o slow-rate.mp4
   Needs: ffmpeg, ffprobe

4. deft video convert bunny.webm -o bunny.mp4
   output

   ok video.convert bunny.webm -> bunny.mp4  1.9MB  0.76s

5. Converted `bunny.webm` to `bunny.mp4` in the current directory.

Output

CodexWith deft, skill as AGENTS.mdPassed2026-11-05

Time

20s

New tokens

16.8k

Total input

94.3k

Output tokens

0.7k

Commands

6

Failed

0

Trace

1. I’ll check the local `deft` video conversion options, then convert `bunny.webm` in the current directory to `bunny.mp4`.

2. deft video --help
   output

   deft video - commands (input -> output)
     info           video -> report      Duration, size, frame rate, codecs
     compress       video -> mp4         Smaller file: --level, --target-size, --max-height
     convert        video -> video       Change container and codec: --to mp4|webm|mov|mkv
     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
     frames         video -> png|jpg...  Save frames as images: --fps 1 or --at 0:05,0:10
     merge          video... -> mp4      Join videos in order (sizes are matched to the first)
     mute           video -> video       Remove the audio track
     resize         video -> video       Scale: --size 1280x, x720, 50%
     rotate         video -> video       Turn clockwise: --angle 90
     split          video -> video       Cut out a part: --from 0:10 --to-time 0:25
     to-gif         video -> gif         Animated GIF: --fps, --size, --from, --to-time
   More: deft video <command> --help

3. deft video convert --help
   output

   deft video convert - Change container and codec: --to mp4|webm|mov|mkv
   Same as: deft convert
   
   Usage: deft video convert <video>... [-o <video|dir>] [options]
   In: video (each handled separately)   Out: video (default <name>.<ext>)
   
   Options:
     --to <mp4|webm|mov|mkv|avi>  Target format (or give -o name.ext)
   Common: -o --force --dry-run --json -j   (deft help common)
   
   Examples:
     deft video convert clip.mp4 --to webm -o clip.webm
     deft video convert clip.mp4 -o clip.mov
   Needs: ffmpeg, ffprobe

4. rg --files -g 'bunny.webm' -g 'bunny.mp4'
   output

   bunny.webm

5. deft video info bunny.webm
   output

   ok video.info bunny.webm  0:10, 1280x720
   bitrate=837083 duration=10.0 fps=30.0 height=720 video_codec=vp9 width=1280

6. `bunny.webm` is VP9 video. I’m converting it to MP4 and will check the output codec to confirm it is H.264.

7. deft video convert bunny.webm -o bunny.mp4
   output

   ok video.convert bunny.webm -> bunny.mp4  1.9MB  0.62s

8. deft video info bunny.mp4
   output

   ok video.info bunny.mp4  0:10, 1280x720
   bitrate=1631188 duration=10.0 fps=30.0 height=720 video_codec=h264 width=1280

9. Converted `bunny.webm` to [bunny.mp4](bunny.mp4). Verified the output uses H.264.

Output

Its files were not kept in this run. The last line of the trace is its own report.

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

Time

23s

New tokens

10.4k

Total input

75.2k

Output tokens

0.7k

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