Captcha

A captcha library that generates audio and image CAPTCHAs.

Features

1. Audio CAPTCHAs DEMO
2. Image CAPTCHAs

Installation

Install captcha with pip:

$ pip install captcha

Usage

Audio and Image CAPTCHAs are in seprated modules:

from captcha.audio import AudioCaptcha
from captcha.image import ImageCaptcha

audio = AudioCaptcha(voicedir='/path/to/voices')
image = ImageCaptcha(fonts=['/path/A.ttf', '/path/B.ttf'])

data = audio.generate('1234')
audio.write('1234', 'out.wav')

data = image.generate('1234')
image.write('1234', 'out.png')

This is the APIs for your daily works. We do have built-in voice data and font data. But it is suggested that you use your own voice and font data.

Voices

We can build our customized voice library with the help of espeak and ffmpeg:

export ESLANG=en

mkdir $ESLANG

for i in {a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z,A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,0,1,2,3,4,5,6,7,8,9}; do mkdir $ESLANG/$i; espeak -a 150 -s 100 -p 15 -v$ESLANG $i -w $ESLANG/$i/orig_default.wav; ffmpeg -i $ESLANG/$i/orig_default.wav -ar 8000 -ac 1 -acodec pcm_u8 $ESLANG/$i/default.wav; rm $ESLANG/$i/orig_default.wav; done

Contribution

We need voice wav files. The voice wav file should be in 8-bit, please keep it as small as possible. Name your voice file as:

{{language}}-{{character}}-{{username}}.wav
# exmaple: zh-1-lepture.wav

TODO: we need a place to upload voice files.