liviaerxin

Gstreamer Pipeline Samples

Table of Contents:

• Gstreamer Pipeline Samples
  • Tips for Debug
  • Video
    • display test video
    • record to file
• record and display at the same time(queue)

dbaldwin

# PX4 launch command
roslaunch mavros px4.launch

# PX4 launch file (default fcu_url worked fine for Pi 4 running Ubuntu server)
https://github.com/mavlink/mavros/blob/master/mavros/launch/px4.launch

If using the mini USB connector on Pi 4 you can use the default fcu_url
<arg name="fcu_url" default="/dev/ttyACM0:57600" />

If using the telemetry 2 port on Pixhawk you need this.

LukeSmithxyz

#!/bin/sh
sed "
	s/title\s*=\s*{\(.*\)},*/%T \1/I
	s/author\s*=\s*{\(.*\)},*/%A \1/I
	s/publisher\s*=\s*{\(.*\)},*/%I \1/I
	s/doi\s*=\s*{\(.*\)},*/%K \1/I
	s/journal\s*=\s*{\(.*\)},*/%J \1/I
	s/volume\s*=\s*{\(.*\)},*/%V \1/I
	s/number\s*=\s*{\(.*\)},*/%N \1/I
	s/pages\s*=\s*{\(.*\)},*/%P \1/I

AlexisTM

#!/usr/bin/env python2
from __future__ import division

import os
import glob
import rospy
from pymavlink import mavutil
from threading import Thread
from mavros_msgs.msg import Mavlink, StatusText
from mavros import mavlink

FrankBuss

/*
See https://gitlab.com/nedopc/npc5/blob/master/emu-rv32i.c for the latest version, with more features and less bugs :-)

RISCV emulator for the RV32I architecture
based on TinyEMU by Fabrice Bellard, see https://bellard.org/tinyemu/
stripped down for RV32I only, all "gotos" removed, and fixed some bugs for the compliance test
by Frank Buss, 2018

Requires libelf-dev:

vo

#!/bin/bash
gst-launch-1.0 udpsrc port=5801 ! 'application/x-rtp,payload=96,encoding-name=H264,clock-rate=(int)90000' ! rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! autovideosink sync=false

vo

from pymavlink import mavutil
import threading

connection = mavutil.mavlink_connection("udp:0.0.0.0:14592")
local = mavutil.mavlink_connection("udpout:127.0.0.1:14593")

def on_msg_from_uas(msg):
    buf = msg.get_msgbuf()
    local.write(buf)

JamesHagerman

Disassembling 1bitsy examples using radare2

Note that because radare2 uses Capstone to disassemble ARM code, there are issues with the disassembly. arm-none-eabi-objdump -d compiledbinary.elf actually does a better job in some cases. For example, msr isn't decompiled correctly...

First, you have to either strip the default ELF binaries the default Makefiles build when you run make OR you need to just compile .bin files using something like:

make binaryname.bin

vo

#!/bin/bash

# Basic gstreamer quad video wall application.
# Displays 4 videos. 
# They have to be synced to eachother and playing for this to work.

PARAMS_NEEDED=4

if [ $# -ne $PARAMS_NEEDED ]
then

fitz123

#!/bin/bash

###############################################################################
#
# Description:
#     Script generates Nimble session-friendly playlists 
#     (parent playlist with sub-playlists inside) and supervisor program/job 
#     of ffmpeg process which pulls from provided source address $ch_source and
#     pushes to localhost nibmle-origin server as a name $ch_res for later HLS transmuxing
#