ffscreencast

ffscreencast (beta)

Features | Usage | Screenshots | Todo | Contribution | License | Version

About

ffscreencast is a shell wrapper for ffmpeg that allows fool-proof screen recording via the command line. It will auto-detect all available monitors, cameras and microphones and is able to interactively or manually choose the desired recording device(s). Additionally ffscreencast will let you overlay the camera stream on top of the desktop session.

Besides that ffscreencast can act as an ffmpeg command generator. Every available option can also just show the corresponding ffmpeg command instead of executing it.

Supported platforms

OSX	Linux	FreeBSD	Windows
via AVFoundation	via x11grab	coming soon	coming soon

Requirements

Program	Required	Description
bash	yes	The whole script is written in bash and might not be 100% Posix compliant
ffmpeg	yes	The ffmpeg binary must be present
v4l2-ctl	Linux	Required for linux to list camera devices
arecord	Linux	Required for linux to list sound devices
xdpyinfo	Linux	Required for linux to list screends

1. Features

• Screen recording
• Camera overlay
• Audio support
• Allows to manually (parameter) or interactively choose monitor
• Allows to manually (parameter) or interactively choose camera
• Allows to manually (parameter) or interactively choose sound device
• ffmpeg command generation

2. Usage

2.1 Overview

To simply start desktop recording your screen call the program without any arguments ffscreencast and it will use the default screen without camera overlay and without sound.

$ ffscreencast

Usage: ffscreencast [-s[num]] [--sargs=] [-a[num]] [--aargs=] [-c[num] [--cargs=] [--oargs=] [-e<ext>] [--dry]
       ffscreencast --slist [--dry]
       ffscreencast --alist [--dry]
       ffscreencast --clist [--dry]
       ffscreencast --help
       ffscreencast --version
       ffscreencast --test

When invoked without any arguments, it will start screen recording
on the default screen without sound and without camera overlay.

Input options:
-s[num]           (Default) Enable screen capturing [with device number X].
                  If no device number is specified it will use the default, if only
                  one device is present, otherwise it will ask you to choose one
                  Use: -s or -s1

--sargs=          Additional screen arguments.
                  Specify additional ffmpeg arguments for the screen input device.
                  Use: --sargs="-framerate 30"
                  Default: ''

-a[num]           Enable audio capturing [with device number X]
                  If no device number is specified it will use the default, if only
                  one device is present, otherwise it will ask you to choose one
                  Use: -a or -a1

--aargs=          Additional audio arguments.
                  Specify additional ffmpeg arguments for the audio input device.
                  Use: --aargs="-ac 1"
                  Default: '-ac 2'

-c[num]           Add camera overlay [with device number X]
                  If no device number is specified it will use the default, if only
                  one device is present, otherwise it will ask you to choose one
                  Use: -c or -c1

--cargs=          Additional camera arguments
                  Specify additional ffmpeg arguments for the camera input device.
                  Use: --cargs="-video_size 1280x720"
                  Default: ''


Output options:
-e<ext>           Output video format extension (Default: mkv)
                  E.g.: -emkv, or -eavi, or -emp4

-oargs=           Additional output arguments
                  Specify additional ffmpeg arguments for the output encoding.
                  Use: --oargs="-crf 0"
                  Default: '-crf 0 -preset ultrafast'


Behavior options:
--dry             Show the command (without executing)


List options:
--list            List all devices
--slist           Only list screen capturing devices (monitors)
--alist           Only list audio capturing devices (microphones)
--clist           Only list camera capturing devices (cams)


System information:
--help            Show this help screen
--version         Show version information
--test            Test requirements

The num (device numbers) can be omitted. If there is only one device of its type available, ffscreencast will automatically default to this device, otherwise it will ask interactively which device to use for recording.

2.2 Examples

Do a screencast on the default screen (without explicitly choosing the monitor)

$ ffscreencast

List monitors and record on monitor 2

$ ffscreencast --slist
Available screen recording devices:

[1] Capture screen 0
[2] Capture screen 1

$ ffscreencast -s2

List cameras

$ ffscreencast --clist
Available camera recording devices:

[0] FaceTime HD Camera

Start a screencast with camera overlay (only one camera present)

$ ffscreencast -c

or select the camera device

$ ffscreencast -c0

Show the ffmpeg command for camera recording

$ ffscreencast -c --dry

ffmpeg -hide_banner -loglevel info -f avfoundation   -i "1" -f avfoundation  -i "0" -c:v libx264 -crf 0 -preset ultrafast -filter_complex 'overlay=main_w-overlay_w-10:main_h-overlay_h-10' "/Users/cytopia/Desktop/Screencast 2015-10-06 at 21.28.01.mkv"

3. Screenshots

Showing screen recording with and without camera overlay.

4. Todo

• Support for BSD
• Support for Windows (via cygwin)?
• Sound is still not working properly
• Improve ffmpeg recording (better options)
• Reduce Linux dependencies
• Get camera device capabilities
• Set camera resolution via cmd
• Set camera position via cmd
• Set sound options via cmd (channels [linux: alsa vs pulse])
• Be able to record one or multiple screens

5. Contribution

Contributors are welcome.

6. License

7. Version

For a complete list of verion see CHANGELOG