https://github.com/bmewj/video-app
A real-time video processing app written in C++ using OpenGL and FFmpeg
https://github.com/bmewj/video-app
cmake cpp ffmpeg opengl tutorial video video-processing
Last synced: 26 days ago
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A real-time video processing app written in C++ using OpenGL and FFmpeg
- Host: GitHub
- URL: https://github.com/bmewj/video-app
- Owner: bmewj
- License: apache-2.0
- Created: 2019-11-09T17:49:50.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2023-08-27T14:11:10.000Z (over 1 year ago)
- Last Synced: 2024-11-05T16:45:28.469Z (6 months ago)
- Topics: cmake, cpp, ffmpeg, opengl, tutorial, video, video-processing
- Language: C++
- Homepage:
- Size: 217 KB
- Stars: 244
- Watchers: 12
- Forks: 60
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
Video App in C++
================
I'm building a visualisation tool for live music performances. The app generates video
grids containing one video for every element in the song. For elements that are pre-recorded
the videos will be pre-recorded. For elements that are played live, the videos will be taken
from webcams/capture cards/live streams.
[This video explains the function of the app in detail.](https://www.youtube.com/watch?v=xSPXzwI9Czk)
## Programming live streams
This app is being developed live on weekly Youtube live-streams. They are announced ahead of time on [my Youtube channel](https://www.youtube.com/channel/UClZL_faO7lGe6nM9MH-uu6A). You can also find all the previous streams on the [C++ Real-time video processing playlist](https://www.youtube.com/playlist?list=PLKucWgGjAuTbobNC28EaR9lbGQTVyD9IS)
## Installation
### 1. Prerequisites
This app has 4 external dependencies:
- **CMake** to build the project,
- **pkg-config** to locate shared libraries,
- **FFmpeg** to read and write video files.
On MacOS using Homebrew, run:
```sh
brew install cmake ffmpeg pkg-config
```
### 2. Clone
```sh
git clone https://github.com/bartjoyce/video-app --recursive
```
The repository includes a submodule for GLFW, so make sure to *recursively* clone the repo. If CMake complains and says it can't find GLFW, it might be because you did not clone it properly. In that case, try:
```sh
git submodule update --init
```
### 3. Build
Inside the repo, create a build directory and run CMake within it:
```sh
mkdir build
cd build
cmake ..
make
```
### 4. Run
```sh
./video-app
```
## Bonus: Webcam capture with AVFoundation
For webcam capture:
```sh
git checkout test/webcam
cd build
cmake ..
make
./video-app
```
This will use AVFoundation to display your webcam on the OpenGL surface.
## Todo
- Fix `av_err2str` build problem in gcc ([see issue](https://github.com/joncampbell123/composite-video-simulator/issues/5)).
- Fix `YUVJ` deprecation problem
- Fix `sws_scale()` segmentation fault on gcc due to badly constructed output buffers
- Consider switch to SDL?
- Replace `sws_scale()` with hardware-accelerated alternative
- Audio playback
- Playback of multiple videos simultaneously