Tomek Szczęsny tomek-szczesny

Links

https://gist.github.com/strezh/9114204

cmds

Convert motec camera mjpg to h264 and stream it to localhost

gst-launch-1.0 -v rtspsrc location=rtsp://10.0.0.11:8554/MCDE3000 latency=0 ! decodebin ! x264enc tune=zerolatency bitrate=500 speed-preset=superfast ! h264parse ! rtph264pay pt=96 ! udpsink host=127.0.0.1 port=5000

Playback h264 from locahost

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

Most GStreamer examples found online are either for Linux or for gstreamer 0.10.

This particular release note seems to have covered important changes, such as:

ffmpegcolorspace => videoconvert
ffmpeg => libav

Applying -v will print out useful information. And most importantly the negotiation results.

	1- The problem is to make SLURM (https://slurm.schedmd.com/) work properly
	2- SLURM is very intricate and difficult to set up (here is SLURM 20.02)
	3- It may be important to have NVIDIA library path added, e.g.:
	export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib/nvidia-410
	4- SLURM depends on MUNGE that can be installed using apt as:
	sudo apt-get update
	sudo apt-get install libmunge-dev libmunge2 munge
	sudo apt-get clean
	5- The same is not true for SLURM itself as its apt package is old
	6- So it seems important to compile it from source code, wgetting aa:

	# Config that is very close to a i3 window manager's keybinding.

	set -s escape-time 0
	setw -g aggressive-resize on

	# First remove all keybindings
	unbind-key -a

	# List keys
	bind-key ? list-keys

	/**
	* USB HID Keyboard scan codes as per USB spec 1.11
	* plus some additional codes
	*
	* Created by MightyPork, 2016
	* Public domain
	*
	* Adapted from:
	* https://source.android.com/devices/input/keyboard-devices.html
	*/