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Corpus Replicator is a corpus generation tool that enables the creation of multiple
unique output files based on templates. The primary intended use case is the
creation of a seed corpus that can be used by fuzzers. Support for additional output
formats can be added via the creation of Recipes
. If a desired format is unsupported,
support can be added via the creation of a CorpusGenerator
.
The goal is to create an efficient corpus that maximizes code coverage and minimizes file size. Small unique files that execute quickly are preferred.
Currently four media types can be generated animation
, audio
, image
and
video
.
Corpus Replicator relies on FFmpeg.
pip install corpus-replicator
This is an example recipe
file.
# "base" contains required entries and default flags
base:
codec: "h264" # name of the codec
container: "mp4" # container/file extension
library: "libx264" # name of library
medium: "video" # supported medium
tool: "ffmpeg" # name of supported tool
default_flags:
encoder: # "encoder" flag group
["-c:v", "libx264"]
resolution: # "resolution" flag group
["-s", "320x240"]
# variations allow flags to be added and overwritten
# one file will be generated for each entry in a flag group
variation:
resolution: # flag group - overwrites default flag group in "base"
- ["-s", "640x480"]
- ["-s", "32x18"]
- ["-s", "64x64"]
monochrome: # flag group - adds new flag group
- ["-vf", "hue=s=0"]
Running the recipe will generate a corpus:
$ corpus-replicator example.yml video -t test
Generating templates...
1 recipe(s) will be used with 1 template(s) to create 4 file(s).
Generating 4 'video/libx264/h264/mp4' file(s) using template 'test'...
Optimizing corpus, checking for duplicates...
Done.
Resulting corpus:
$ ls generated-corpus/
video-h264-libx264-test-monochrome-00.mp4
video-h264-libx264-test-resolution-01.mp4
video-h264-libx264-test-resolution-00.mp4
video-h264-libx264-test-resolution-02.mp4
A more complex corpus can be generated by using multiple Recipes
and Templates
at
once.
Recipes are stored in src/corpus_replicator/recipes.
FAQs
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We found that corpus-replicator demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 2 open source maintainers collaborating on the project.
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