# fvideo
[](https://github.com/lukehsiao/fvideo/actions/workflows/rust.yml)
Low-latency foveated video encoding prototype.
## Installation
### Dependencies
`fvideo` has only been tested on Ubuntu 18.04/20.04. First, you must have the
following system dependencies:
```
sudo apt install libx264-dev ffmpeg libavutil-dev libavformat-dev libavfilter-dev libavdevice-dev llvm-dev libudev-dev mpv
```
Note that `fvideo` requires FFmpeg 4.3.x, so if running on Ubuntu 18.04, you'll need to install it
yourself or use the unofficial PPA:
```
sudo add-apt-repository ppa:jonathonf/ffmpeg-4
```
Next, you must install Eyelink's libraries.
```
sudo add-apt-repository universe
sudo apt update
sudo apt install ca-certificates
sudo apt-key adv --fetch-keys https://apt.sr-research.com/SRResearch_key
sudo add-apt-repository 'deb [arch=amd64] https://apt.sr-research.com SRResearch main'
sudo apt update
sudo apt install eyelink-display-software
```
Then, you can use [cargo] to build the binaries:
```
cargo build --release
```
## Usage
### User Study
Note that the user study binary currently expect videos to be in specific directories with specific
names. This will be changed in the future.
```
user_study 0.1.0
The user study experiment interface.
USAGE:
user_study [OPTIONS] --name
FLAGS:
-h, --help
Prints help information
-V, --version
Prints version information
OPTIONS:
-n, --name
The full name of the participant
-o, --output