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How can I extract a good quality JPEG image from a video file with ffmpeg?
... the default is -qmin 2).
To output a series of images:
ffmpeg -i input.mp4 -qscale:v 2 output_%03d.jpg
See the image muxer documentation for more options involving image outputs.
To output a single image at ~60 seconds duration:
ffmpeg -ss 60 -i input.mp4 -qscale:v 4 -frames:v 1 output.jpg
This ...
What does each of the [y,n,q,a,d,/,K,j,J,g,e,?] stand for in context of git -p
...s staged.
– Alexander Bird
Oct 20 '14 at 21:39
I use -p for stashing, didn't know you could use this for add too! Just...
What are the differences between the BLOB and TEXT datatypes in MySQL?
...
answered Jul 24 '12 at 5:45
DarceyDarcey
1,67111 gold badge1212 silver badges1919 bronze badges
...
postgresql port confusion 5433 or 5432?
...ice will run on that port.
In PostgreSQL's case it's typical to use port 5432 if it is available. If it isn't, most installers will choose the next free port, usually 5433.
You can see what is actually running using the netstat tool (available on OS X, Windows, and Linux, with command line syntax ...
AJAX POST and Plus Sign ( + ) — How to Encode?
...orrect
escape(text); // %u0100
// correct
encodeURIComponent(text); // "%C4%80"
Note: "%C4%80" is equivalent to: escape('\xc4\x80')
Which is the byte sequence (\xc4\x80) that represents Ā in UTF-8. So if you use encodeURIComponent() your server side must know that it is receiving UTF-8. Otherwi...
Comparison of Lucene Analyzers
... analyzer?
– anon
Jan 31 '15 at 12:24
1
@anon: Tika is a separate project with several key featur...
How to get anchor text/href on click using jQuery?
...
243
Note: Apply the class info_link to any link you want to get the info from.
<a class="info_l...
Which data type for latitude and longitude?
...
144
You can use the data type point - combines (x,y) which can be your lat / long. Occupies 16 byte...
Difference between 'python setup.py install' and 'pip install'
...ith Python as of Python 2.7.9 on the Python 2.x series, and as of Python 3.4.0 on the Python 3.x series, making it even easier to use.
So basically, use pip. It only offers improvements over using python setup.py install.
If you're using an older version of Python, can't upgrade, and don't have...
jQuery append() - return appended elements
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264
There's a simpler way to do this:
$(newHtml).appendTo('#myDiv').effects(...);
This turns thin...