VideoSnap

Simple command line app to record video and audio from a QuickTime capture device

View the Project on GitHub matthutchinson/videosnap

VideoSnap

VideoSnap is an OSX command line tool for recording video and audio from any attached capture device.

You can specify which device to capture from, the duration, encoding and a delay period (before capturing starts). You can also disable audio recording.

By default VideoSnap will capture both video and audio from the default capture device at 30fps, with a Medium quality preset and a short (0.5s) warm-up delay.

If no duration is specified, VideoSnap will record until you cancel with [Ctrl+c]. You can also use VideoSnap to list attached capture devices by name.

Requirements

If you need to capture video on older versions of OSX (or on 32-bit hardware), try wacaw.

Installation

Download the latest release and unpack it like so:

tar -zxvf videosnap-[version].tar.gz
cp -R videosnap/usr/local/* /usr/local/

This will unzip the archive, and copy the binary and man page to your /usr/local directories.

Usage

The following options are available:

  -l    List attached capture devices
  -w    Set delay before capturing starts (in seconds, default 0.5s)
  -t    Set duration of video (in seconds)
  -d    Set the capture device by name (use -l to list attached devices)
  -p    Set the encoding preset (use High, Medium (default), Low, 640x480 or 1280x720)
  -v    Turn ON verbose mode (OFF by default)
  -h    Show help
  --no-audio
        Don't capture audio (audio IS captured by default)

Examples

Capture 10.75 secs of video in 1280x720 720p HD format saving to movie.mov

videosnap -t 10.75 -p '1280x720'

Capture 1 minute of video (Medium preset), but no audio from the "Built-in iSight" device, delaying for 5 secs, saving to my_video.mov

videosnap -t 60 -w 5 -d 'Built-in iSight' --no-audio my_video.mov

List all attached devices by name

videosnap -l

Warming Up

Since some camera hardware can take a while to warm up, a default delay of 0.5 seconds is applied. Override this with the -w argument (0 meaning no delay).

Encoding Presets

The AVFoundation framework provides the following video encoding presets:

Resolution Comments
High Highest recording quality. This varies per device.
Medium Suitable for Wi-Fi sharing. The actual values may change.
Low Suitable for 3G sharing. The actual values may change.
640x480 VGA.
1280x720 720p HD.

Use the -p flag to choose a preset.

Help

Get command help with:

videosnap -h
# or via the man page with
man videosnap

If you have any problems, please do raise an issue on GitHub. When reporting a bug, remember to mention what platform and hardware you are using and the steps I can take to reproduce the issue.

Contributing

Bug reports and pull requests are welcome on GitHub. Before submitting pull requests, please read the contributing guidelines for more details.

This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct. See here for more details.

Development

VideoSnap is coded with Objective-C and uses the AVFoundation framework. You can build the project with Xcode (using the Xcode project workspace in the repository, or with the xcodebuild command).

Future Work

Work in progress is usually mentioned at the top of the CHANGELOG. If you'd like to get involved in contributing, here are some ideas:

License

VideoSnap is distributed under the terms of the MIT License.

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