transcode a mjpeg ip cam on demand with a cgi script using ffmpeg 
To minimize bandwidth for video streaming i have to transcode mjpeg to h264.
To do this on demand ffserver is no option for me.
Therefore a small cgi script on the webserver with ffmpeg did the trick:

#!/bin/bash

echo -e "Content-type: video/avi\n"

#ffmpeg -an -analyzeduration 0 -f mjpeg -r 8 -i http://IP_CAM:PORT \
# -c:v libx264 -preset ultrafast -r 8 -threads 2 -b:v 150k -f avi - 2>/dev/null &

avconv -an -analyzeduration 0 -f mjpeg -r 8 -i http://IP_CAM:PORT \
-c:v libx264 -pre ultrafast -r 8 -threads 2 -b:v 150k -f avi - 2>/dev/null &
pid=$!
trap "kill $pid" SIGTERM SIGPIPE
wait


[ view entry ] ( 2272 views )   |  print article
port forward with iptables 
iptables -I FORWARD -i INTERFACE -p tcp --dport PORT -j ACCEPT
iptables -A PREROUTING -t nat -i INTERFACE -p tcp --dport PORT -j DNAT --to-destination LOCAL_IP


[ view entry ] ( 1113 views )   |  print article
apt-get behind a server port redirected with ssh to a proxy 
There is an apt proxy (Apt-Cacher NG), a workstation, a server and a server behind that server.
workstation> ssh -R3142:proxy:3142 server

server> ssh -R3142:127.0.0.1:3142 server_behind

server_behind> cat /etc/apt/apt.conf.d/01proxy
Acquire::http { Proxy "http://localhost:3142"; }

server_behind> apt-get update; apt-get upgrade


[ view entry ] ( 906 views )   |  print article
Ubuntu Wake on Lan WOL 
If ethtool ethX doesn't contain Wake-on: g then add pre-down /sbin/ethtool -s ethX wol g to /etc/network/interfaces

Add NETDOWN=no to /etc/default/halt

Test with /sbin/shutdown -P now and wakeonlan [-i BROADCASTADDR] MAC (apt-get install wakeonlan)

[ view entry ] ( 872 views )   |  print article
Find duplicate filenames 
find -type f -printf "%f\n" | sort | uniq -d


[ view entry ] ( 547 views )   |  print article

<<First <Back | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | Next> Last>>