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Better formatting and framerate discussion

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Brandon Rozek 2020-02-25 21:03:35 -05:00
parent 9329d8a605
commit 1e523bd5b2
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content/blog/gstreamer.md
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@ -32,18 +32,48 @@ 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
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
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=15/1 ! \
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 -v udpsrc port=5000 ! application/x-rtp,payload=96 ! rtph264depay ! decodebin ! videoconvert n-threads=4 ! ximagesink
gst-launch-1.0 \
udpsrc port=5000 ! \
application/x-rtp,payload=96 ! \
rtph264depay ! \
decodebin ! \
videoconvert n-threads=4 ! \
ximagesink
```