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Fastest way to extract frames using ffmpeg?
...llelize the task. I used the N processes with FIFO approach here:
https://unix.stackexchange.com/questions/103920/parallelize-a-bash-for-loop/216475#216475
open_sem(){
mkfifo /tmp/pipe-$$
exec 3<>/tmp/pipe-$$
rm /tmp/pipe-$$
local i=$1
for((;i>0;i--)); do
printf %s 000 >&...
system(“pause”); - Why is it wrong?
...omation of some task that pause is very much undesired!
It's not portable.
Unix-land has no standard pause command.
The pause command is an internal cmd.exe command and can't be overridden, as is erroneously claimed in at least one other answer. I.e. it's not a security risk, and the claim that AV...
How to create a windows service from java app
...n is a good alternative. It has Procrun for windows services, and Jsvc for unix daemons. It uses less restrictive Apache license, and Apache Tomcat uses it as a part of itself to run on Windows and Linux! To get it work is a bit tricky, but there is an exhaustive article with working example.
Besid...
How to fix “Attempted relative import in non-package” even with __init__.py
...cutable scripts (e.g. when using a shebang and doing ./my_script.py at the Unix shell) would all be useful. This whole issue was quite tricky for me to figure out or find concise and understandable documentation on.
– Mark Amery
Jan 13 '14 at 17:31
...
What is the difference between double-ampersand (&&) and semicolon (;) in Linux Bash?
...tes command2 if (and only if) command1 execution ends up successfully. In Unix jargon, that means exit code / return code equal to zero.
command1; command2
command1; command2 executes command2 after executing command1, sequentially. It does not matter whether the commands were successful or not.
...
What's the best way to distribute Java applications? [closed]
...an be easily integrated with Ant and you can build Windows installers from Unix/Linux/Mac and the other way around. Because the generated installers are native, they do not require a self-extraction step or a JRE to be already present in the target system, which means smaller installers and saves yo...
Unzip a file with php
...em shell, with the php user. So, if your user is www, you can do all what unix user "www" can do on the command line, including the removing of files or directories. It's really worst if your php user is root. You can find more info about it there: stackoverflow.com/questions/3115559/exploitable-ph...
Simple Vim commands you wish you'd known earlier [closed]
..., the first time you open vim is because you need to edit a config file in Unix, so you write "$ vim file" and you can't find your way out. Or am I the only one?
– José Ramón
Sep 9 '14 at 6:52
...
Why are empty strings returned in split() results?
...such as csv file lines [[net of quoting issues]], lines from /etc/group in Unix, and so on), it allows (as @Roman's answer mentioned) easy checks for (e.g.) absolute vs relative paths (in file paths and URLs), and so forth.
Another way to look at it is that you shouldn't wantonly toss information o...
What's the difference between git clone --mirror and git clone --bare
...
basename is the normal unix utility that strips the directory part of a path, and $() is simply bash's command substitution.
– Victor Zamanian
Feb 27 '13 at 21:29
...