plotframes

plotframes
===========
A Node.js frame plotter inspired on FFmpeg plotframes but 350x faster, now without using any temporal file and available as a node module!

!Bitrate Plot

Installation and running as a CLI
``
npm install plotframes -g
plotframes input.mkv
`

Progress report to stdout:
`
Analyzing 00:02:00.000 / 00:01:00.00 50.00%
`

CLI options
`
Usage: plotframes [OPTIONS]
options:
-h, --help Print this help and exit.
-i FILE, --input=FILE Specify multimedia file to read. This is the
file passed to the ffprobe command. If not
specified it is the first argument passed to
the script.
-s 0, --stream=0 Specify stream to plot, options are "all",
0, 1, 2... etc.
-o FILE.png, --output=FILE.png Set the name of the output used by gnuplot.
If not specified no output is created. Must
be used in conjunction with the terminal
option.
-t png, --terminal=png Set the name of the terminal used by
gnuplot. By default it is "windows". Must be
used in conjunction with the output option.
Check the gnuplot manual for the valid
values.
-f, --frames Create a plot based on frame number instead
of frame time.
-p, --print Print the gnuplot script into the stdout and
doesn't run gnuplot, ideal if you want to
edit/study the script.
`

####Examples

You can set many options to the gnuplot terminal argument:
`
plotframes -i input.m4v -o plot.png -t "set terminal png transparent enhanced size 7000,800"
`

You can set plotframes to output the gnuplot script to stdout and then
pipe the result to gnuplot, this enables a world of possibilities for Linux
and Unix users:
`
plotframes -i input.mkv -s 0 -p | gnuplot -p
`

Or you can save the output redirecting the result:
`
plotframes -i input.mkv -p > script.txt
`

#### Requirements:
plotframes for Node.js requires the following software to be installed and
available on the system PATH environment:
* gnuplot.
* FFmpeg >= 1.2 with the ffprobe command.

#### Installing dependencies


##### Windows
1. Download and install Node.js
2. Download a FFmpeg build, uncompress it
into a directory that is included in the system %path%.
3. Download and install gnpuplot:
There are other downloads
in case you want to download a different version.
4. Make sure to add ffmpeg and gnuplot to your system environment %PATH%.
5. Open your Command Promt and run npm install plotframes -g.
6. Done, now you can run plotframes anywhere in your command prompt.


##### OS X
* Install Xcode from the App Store.
* Install Homebrew from your terminal.

Then, with Hombrew on your terminal intall FFmpeg, XQuartz (needed to render to
x11) and gnuplot.
`
brew install ffmpeg
brew install Caskroom/cask/xquartz
brew install gnuplot --with-x11
`

After that you can install plotframes:
`
sudo npm install plotframes -g
`

##### Ubuntu

Install Node.js
`
curl -sL https://deb.nodesource.com/setup | sudo bash -
sudo apt-get install nodejs
`

Install FFmpeg
`
sudo ppa-purge ppa:mc3man/trusty-media
sudo add-apt-repository ppa:mc3man/trusty-media
sudo apt-get update
sudo apt-get install ffmpeg
`

Install gnuplot
`
sudo apt-get install gnuplot-x11
`

Or do all at once
`
sudo ppa-purge ppa:mc3man/trusty-media
sudo add-apt-repository ppa:mc3man/trusty-media
curl -sL https://deb.nodesource.com/setup | sudo bash -
sudo apt-get install ffmpeg gnuplot-x11 nodejs
`

After that you can install plotframes:
`
sudo npm install plotframes -g
`

#### Problems installing global packages on OS X or Ubuntu?

Ubuntu fix:
`
npm config set prefix ~/.npm
echo 'export PATH=$HOME/.npm/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
`

OS X fix:
`
npm config set prefix ~/.npm
echo 'export PATH=$HOME/.npm/bin:$PATH' >> ~/.bashrc
echo . ~/.bashrc >> ~/.bash_profile
. ~/.bashrc
`

#### As a node module:

You can load plotframes as a node module and get the frames data, get the
gnuplot script, customize colors, etc. here are two examples:


Example 1 - Getting the data object
`javascript
var plotframes = require('plotframes'),
nlb = (/^win/.test(process.platform))?'\x1B0G':'\n';

var input_file = 'input.mkv';

plotframes.getFrames(
input_file,
function(err, res){
if(err){
console.log(err);
}else{
console.lod(JSON.stringify(res));
}
},
function(data){
var progress = (data.time/data.length)*100;
process.stderr.write(progress.toFixed(2)+'%'+nlb);
}
);
`

Example 2 - Getting the plot data
`javascript
var plotframes = require('plotframes'),
nlb = (/^win/.test(process.platform))?'\x1B[0G':'\n';

var input_file = 'input.mkv';

plotframes.plotScript(input_file,
function(err, res) {
if(err){
console.log(err);
}else{
console.log(res);
}
},{
as_string: true,
frames: false,
stream: 0,
colors:{
I: '#00ffff',
P: '#ff00ff',
B: '#ffff00',
A: '#2dff00',
average: '#000000',
bitrate: '#00ff00',
},
styles:{
I: 'impulses',
P: 'lines',
B: 'lines',
A: 'lines',
},
progress: function(data){
var progress = (data.time/data.length)*100;
process.stderr.write(progress.toFixed(2)+'%'+nlb);
}
}
);
``

#### Donations
Did you find this useful? Consider donating. Your contribution will help cover the costs of developing, distributing and supporting this project, not to mention the great relief it would bring my bank account, seriously, donate, it will make me very :smiley:

[PayPal

$3

(The MIT License)

Copyright (c) by Rodrigo Polo http://RodrigoPolo.com

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