mirror of
https://github.com/Brandon-Rozek/website.git
synced 2024-11-25 01:26:30 -05:00
80 lines
1.8 KiB
Markdown
80 lines
1.8 KiB
Markdown
---
|
|
title: "GStreamer"
|
|
date: 2020-02-08T20:46:36-05:00
|
|
draft: false
|
|
tags: [ "Audio-Video" ]
|
|
medium_enabled: true
|
|
---
|
|
|
|
GStreamer is a pipeline based multimedia framework that goes from capture, processing, to a sink such as a X window or UDP sink.
|
|
|
|
To install on Ubuntu run,
|
|
|
|
```bash
|
|
sudo apt install gstreamer1.0-tools
|
|
```
|
|
|
|
Pipelines are indicated via `!`.
|
|
|
|
To capture your webcam feed and display it in a X window, run the following:
|
|
|
|
```bash
|
|
gst-launch-1.0 v4l2src device=/dev/video0 ! videoconvert ! ximagesink
|
|
```
|
|
|
|
For the PiCar project I'm on, I need to send the video from the raspberry pi over the network as fast as possible. The next couple commands have options that reflect this.
|
|
|
|
On the PiCar, I send h264 video over the network. You might need to install an additional package for h264 encoding to work.
|
|
|
|
```bash
|
|
sudo apt install gstreamer1.0-plugins-ugly
|
|
```
|
|
|
|
To send h264 video over the network,
|
|
|
|
```bash
|
|
gst-launch-1.0 \
|
|
v4l2src device=/dev/video0 ! \
|
|
videoconvert ! \
|
|
x264enc ! \
|
|
rtph264pay ! \
|
|
udpsink host=192.168.0.2 port=5000
|
|
```
|
|
|
|
To send it as fast as you can,
|
|
|
|
```bash
|
|
gst-launch-1.0 \
|
|
v4l2src device=/dev/video0 ! \
|
|
videoconvert ! \
|
|
x264enc interlaced=true tune=zerolatency speed-preset=ultrafast ! \
|
|
rtph264pay ! \
|
|
udpsink host=192.168.0.2 port=5000
|
|
```
|
|
|
|
To send it as fast as possible under a given framerate (ex: 30)
|
|
```bash
|
|
gst-launch-1.0 \
|
|
v4l2src device=/dev/video0 ! \
|
|
videoconvert ! \
|
|
videorate ! \
|
|
video/x-raw,framerate=30/1 ! \
|
|
x264enc interlaced=true tune=zerolatency speed-preset=ultrafast ! \
|
|
rtph264pay ! \
|
|
udpsink host=192.168.0.2 port=5000
|
|
```
|
|
|
|
|
|
|
|
To receive it and display it on an X-window,
|
|
|
|
```bash
|
|
gst-launch-1.0 \
|
|
udpsrc port=5000 ! \
|
|
application/x-rtp,payload=96 ! \
|
|
rtph264depay ! \
|
|
decodebin ! \
|
|
videoconvert n-threads=4 ! \
|
|
ximagesink
|
|
```
|
|
|