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FFmpeg: How to split video efficiently?
....ts -vcodec copy -acodec copy -ss 00:30:00 -t 01:00:00 -sn test2.mkv
echo "One command"
time ffmpeg -v quiet -y -i input.ts -vcodec copy -acodec copy -ss 00:00:00 -t 00:30:00 \
-sn test3.mkv -vcodec copy -acodec copy -ss 00:30:00 -t 01:00:00 -sn test4.mkv
Which outputs...
Two commands
real 0m...
What is the difference between id and class in CSS, and when should I use them? [duplicate]
...s are useful when you have, or possibly will have in the future, more than one element that shares the same style. An example may be a div of "comments" or a certain list style to use for related links.
Additionally, a given element can have more than one class associated with it, while an element...
MySQL INNER JOIN select only one row from second table
...I think that my answer is more simple and is faster because I'm using just one inner join. Maybe I'm wrong?
– Mihai Matei
Sep 21 '12 at 8:01
2
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How can I pair socks from a pile efficiently?
...as doing it is not very efficient. I was doing a naive search — picking one sock and "iterating" the pile in order to find its pair. This requires iterating over n/2 * n/4 = n 2 /8 socks on average.
...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
...cisely the number of pairs (a,c) in L such that a+c=2b. [CLRS, Ex. 30.1-7] One such pair is (b,b) always (so the coefficient is at least 1), but if there exists any other pair (a,c), then the coefficient is at least 3, from (a,c) and (c,a). For the example above, we have the coefficient of x10 to be...
Is it possible to decrypt MD5 hashes?
Someone told me that he has seen software systems that:
24 Answers
24
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PHP Pass by reference in foreach [duplicate]
...t's overwritten each time.
You can see it like that:
$a = array ('zero','one','two', 'three');
foreach ($a as &$v) {
}
foreach ($a as $v) {
echo $v.'-'.$a[3].PHP_EOL;
}
As you can see, the last array item takes the current loop value: 'zero', 'one', 'two', and then it's just 'two'... : ...
How can I parse a CSV string with JavaScript, which contains comma in data?
...
Disclaimer
2014-12-01 Update: The answer below works only for one very specific format of CSV. As correctly pointed out by DG in the comments, this solution does not fit the RFC 4180 definition of CSV and it also does not fit Microsoft Excel format. This solution simply demonstrates how...
Which is more efficient: Multiple MySQL tables or one large table?
...up a new system, it almost makes sense to combine all of these tables into one big table of related content.
8 Answers
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Why is there “data” and “newtype” in Haskell? [duplicate]
...ition is just a data definition that obeys some restrictions (e.g., only one constructor), and that due to these restrictions the runtime system can handle newtype s more efficiently. And the handling of pattern matching for undefined values is slightly different.
...