Joiner is responsible for joining stego frames in a fashion determined by the input string (Transaction ID)
6 |A two minute video in frames is around 20 GB. Joiner needs 4 folders 7 |
Joiner needs enough space for all of this, and an external HD mounts differently each time
16 |Run from shell to be sure , web based query might be faulty
17 || {{ document['name'] }} | 13 | {% end %} 14 |15 | Transformations 16 | | 17 |
|---|
| 5 | 6 | | 7 |8 | 12 | | 13 |
14 |
15 |
18 |
19 | |
20 |
| Name | 8 |Size (bytes) | 9 |Last Modified | 10 |
|---|---|---|
| {{ document['name'] }} | 15 |{{ document['size'] }} | 16 |{{ document['last-modified'] }} | 17 |
6 | 
10 | The result is : {{ bitstring }}
17 | {% end %} 18 | 19 |Given two files containing the luminance values , as well as the configuration file, it will return the detected code
21 | 22 | 37 | 38 |
12 |
20 |
13 |
21 |
29 | It takes all the frames from a folder of a video, and produces three folders - Normal, Zero and One Folder
5 |This is a preprocessing step before joiner creates the stego video.
6 |Unfortunately, this server does not have a GPU to support creating the zero one and normal folder, as it takes 34 seconds per Frame
7 |A two minute video as 3000 frames !
8 | 9 | 10 |Folder layout
13 |
14 | embed 1 frames
18 |
19 | embed 0 frames
23 |
24 | 
37 | Original Image
50 |
51 | Increased Luma
55 |
56 | Decreased Luma
60 |
61 | Given a video, it will split it into frames. A frame rate can optionally be given
5 | 6 |Original Video Split
10 |
11 | Here is the code
18 | 19 |
20 | #!/usr/bin/env bash
21 | filename=$(basename "$1");
22 | extension="${filename##*.}";
23 | filename="${filename%.*}";
24 | pretty_separator="-----------------------------------------------------------------------";
25 |
26 |
27 | if [[ -z "$1" ]]; then
28 | echo "Usage: ./anto_script.sh video_file [framerate=25]"
29 | exit;
30 | fi
31 | if [[ -z "$2" ]]; then
32 | frame_rate=25;
33 | else
34 | frame_rate=$2;
35 | fi
36 |
37 | echo $pretty_separator;
38 | image_dir="images_$filename";
39 | if [ -d "$image_dir" ]; then
40 | echo "Directory $image_dir already exists";
41 | read -p "Delete directory and continue Y/n? " -n 1 -r
42 | echo # (optional) move to a new line
43 | if [[ $REPLY =~ ^[Yy]$ ]]
44 | then
45 | # do dangerous stuff
46 | rm -rf $image_dir;
47 | else
48 | echo "remove and run this again ";
49 | exit;
50 | fi
51 | fi
52 | echo "creating $image_dir";
53 | mkdir $image_dir;
54 |
55 | echo "running ffmpeg on $filename storing images in $image_dir, modify script to change framerate, default $frame_rate";
56 | echo $pretty_separator;
57 |
58 | ffmpeg -i $1 -r $frame_rate -f image2 $image_dir/image_%08d.bmp;
59 |
60 | echo $pretty_separator;
61 |
62 | ls -d -1 $PWD/$image_dir/*.bmp > $image_dir/filenames.txt;
63 | echo "calling calc_luminance.py on the images, saved at $image_dir/luminance_values";
64 | python calc_luminance.py $image_dir/filenames.txt > $image_dir/luminance_values.repr ;
65 |
66 | echo $pretty_separator;
67 |
68 | echo "Creating graph and saving in $image_dir/luminance_values.repr.bmp";
69 | python plotter.py $image_dir/luminance_values.repr ;
70 | # eog $image_dir/luminance_values.repr.bmp;
71 | echo "done";
72 |
73 | 
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13 |Nulla vitae elit libero, a pharetra augue mollis interdum.
14 |Nulla vitae elit libero, a pharetra augue mollis interdum.
15 |Nulla vitae elit libero, a pharetra augue mollis interdum.
16 |Nulla vitae elit libero, a pharetra augue mollis interdum.
17 |Nulla vitae elit libero, a pharetra augue mollis interdum.
18 |Nulla vitae elit libero, a pharetra augue mollis interdum.
19 |
20 | 
24 | Lorem ipsum dolor sit amet, consectetur adipiscing elit.
27 |
31 | Praesent commodo cursus magna, vel scelerisque nisl consectetur.
34 |