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Fetch frame count with ffmpeg
Does anyone know how to fetch the number of total frames from a video file using ffmpeg? The render output of ffmpeg shows the current frame and I need the frame count to calculate the progress in percent.
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How Python web frameworks, WSGI and CGI fit together
...s to use CGI to run a script. Another way to respond is to simply serve a file.
In the case of CGI, Apache prepares an environment and invokes the script through the CGI protocol. This is a standard Unix Fork/Exec situation -- the CGI subprocess inherits an OS environment including the socket a...
What is the best way to ensure only one instance of a Bash script is running? [duplicate]
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If the script is the same across all users, you can use a lockfile approach. If you acquire the lock, proceed else show a message and exit.
As an example:
[Terminal #1] $ lockfile -r 0 /tmp/the.lock
[Terminal #1] $
[Terminal #2] $ lockfile -r 0 /tmp/the.lock
[Terminal #2] lockfile: ...
Custom HTTP headers : naming conventions
...ere's so many proposed standards that will never see the light of day. For file types, sure; drop the X- prefix. I'm against it, but go ahead and do it. For headers OTOH, don't drop it. It makes it easy to look at and go, "oh, it's non-standard; I can ignore it" vs "there's those non-standard X- hea...
Remove .php extension with .htaccess
...y. I want this to just work in the directory that contains the .htaccess file.
15 Answers
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How do I match any character across multiple lines in a regular expression?
...s sed 'H;1h;$!d;x; s/\(.*\)><Foobar>/\1/' (H;1h;$!d;x; slurps the file into memory). If whole lines must be included, sed '/start_pattern/,/end_pattern/d' file (removing from start will end with matched lines included) or sed '/start_pattern/,/end_pattern/{{//!d;};}' file (with matching lin...
vs2008编译boost详细步骤 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
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install Install headers and compiled library files to the
======= configured locations (below).
在“--prefix=”指定的目录下生成所有头文件
（boost源代码下boost文件夹下所有文件）和指...
Linux, Why can't I write even though I have group permissions?
I want to create a file in a directory owned by the staff group which I am a member of. Why can I not do this?
6 Answers
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Is there a way to crack the password on an Excel VBA Project?
...irect VBA approach which doesn't require HEX editing. It will work for any files (*.xls, *.xlsm, *.xlam ...).
Tested and works on:
Excel 2007
Excel 2010
Excel 2013 - 32 bit version
Excel 2016 - 32 bit version
Looking for 64 bit version? See this answer
How it works
I will tr...
“Insufficient Storage Available” even there is lot of free space in device memory
...onality.
Basically, Delete dumpstate/logcat in SysDump clears out the log files in /data/log. But you can also do this manually without SysDump. (This is assuming your phone has been rooted, which will be the case if your phone is running CyanogenMod or any other non-stock ROM.)
Make sure Superus...