matthutchinson / Videosnap
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VideoSnap
VideoSnap is an OSX command line tool for recording video and audio from any attached capture device (including any attached iOS 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
- OSX 10.7+ (x86_64)
- A web cam
If you need to capture video on older versions of OSX (or on 32-bit hardware), try wacaw.
Installation
Download the latest release and run the installer.
This will copy the binary and man page to your /usr/local directory.
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:
- Allow VideoSnap to pipe captured bytes to the STDOUT stream
- Submit VideoSnap as a package for Homebrew
- Default filename should include a timestamp of when recording began
- Allow more size/quality options for video and/or audio
- Smile detection while capturing video/image, determine a happiness factor/score
- Allow VideoSnap to capture a single frame to an image file (with compression options based on file type like ImageSnap)
- A comprehensive test suite in Xcode
License
VideoSnap is distributed under the terms of the MIT License.
Who's Who?
- VideoSnap by Matthew Hutchinson
- Inspired by ImageSnap by @rharder