dvcrn mediaproc
Locked-down media processing over SSH. Built on lockbox — no shell access, no injection, no bullshit.
For installation and deployment, see references/setup.md.
SSH Wrapper
Use scripts/mediaproc.sh for all commands. It handles host, port, and host key acceptance via MEDIAPROC_HOST and MEDIAPROC_PORT env vars.
scripts/mediaproc.sh <command> [args]
scripts/mediaproc.sh <command> < input_file
scripts/mediaproc.sh <command> > output_file
Media Tools
| Command | Description |
|---|---|
ffmpeg |
Video/audio encoding, transcoding, filtering |
ffprobe |
Media file analysis |
sox |
Audio processing |
soxi |
Audio file info |
convert |
Image conversion/manipulation (ImageMagick) |
identify |
Image file info (ImageMagick) |
magick |
ImageMagick CLI |
Upload, Process, Download
# Upload
scripts/mediaproc.sh "put input.mp4" < input.mp4
# Transcode
scripts/mediaproc.sh "ffmpeg -i /work/input.mp4 -c:v libx264 /work/output.mp4"
# Download result
scripts/mediaproc.sh "get output.mp4" > output.mp4
# Clean up
scripts/mediaproc.sh "remove-file input.mp4"
scripts/mediaproc.sh "remove-file output.mp4"
Video Operations
# Get video info as JSON
scripts/mediaproc.sh "ffprobe -v quiet -print_format json -show_format -show_streams /work/video.mp4"
# Apply frei0r glow effect
scripts/mediaproc.sh "ffmpeg -i /work/in.mp4 -vf frei0r=glow:0.5 /work/out.mp4"
# Extract audio from video
scripts/mediaproc.sh "ffmpeg -i /work/video.mp4 -vn -acodec libmp3lame /work/audio.mp3"
# Create thumbnail from video
scripts/mediaproc.sh "ffmpeg -i /work/video.mp4 -ss 00:00:05 -vframes 1 /work/thumb.jpg"
Audio Operations
# Convert audio format
scripts/mediaproc.sh "sox /work/input.wav /work/output.mp3"
# Get audio info
scripts/mediaproc.sh "soxi /work/audio.wav"
# Normalize audio
scripts/mediaproc.sh "sox /work/input.wav /work/output.wav norm"
Image Operations
# Resize image
scripts/mediaproc.sh "convert /work/input.png -resize 50% /work/output.png"
# Create thumbnail
scripts/mediaproc.sh "convert /work/input.jpg -thumbnail 200x200 /work/thumb.jpg"
# Get image info
scripts/mediaproc.sh "identify /work/image.png"
File Operations
All paths relative to the work directory. Traversal blocked.
| Command | Description |
|---|---|
put <path> |
Upload file from stdin |
get <path> |
Download file to stdout |
list-files [--json] |
List directory |
remove-file <path> |
Delete a file |
create-dir <path> |
Create directory |
remove-dir <path> |
Remove empty directory |
remove-dir-recursive <path> |
Remove directory recursively |
move-file <src> <dst> |
Move or rename |
copy-file <src> <dst> |
Copy a file |
file-info <path> |
Get file metadata as JSON |
file-exists <path> |
Check if file exists (true/false) |
file-hash <path> |
Get SHA256 hash |
disk-usage [path] |
Get bytes used |
search-files <glob> |
Glob search |
append-file <path> |
Append stdin to a file |
# List files
scripts/mediaproc.sh "list-files"
# List as JSON (size, modified, isDir, permissions)
scripts/mediaproc.sh "list-files --json"
# List subdirectory
scripts/mediaproc.sh "list-files project1"
# File operations
scripts/mediaproc.sh "create-dir project1"
scripts/mediaproc.sh "move-file old.mp4 new.mp4"
scripts/mediaproc.sh "copy-file input.mp4 backup.mp4"
scripts/mediaproc.sh "file-info video.mp4"
scripts/mediaproc.sh "file-exists video.mp4"
scripts/mediaproc.sh "file-hash video.mp4"
scripts/mediaproc.sh "search-files '*.mp4'"
scripts/mediaproc.sh "disk-usage"
scripts/mediaproc.sh "remove-dir-recursive project1"
Plugins
- frei0r — Video effect plugins (used via
-vf frei0r=...) - LADSPA — Audio effect plugins: SWH, TAP, CMT (used via
-af ladspa=...) - LV2 — Audio plugins (used via
-af lv2=...)
Fonts
2200+ fonts included covering emoji, CJK, Arabic, Thai, Indic, monospace, and more. Custom fonts can be mounted to /usr/share/fonts/custom.