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How can I extract audio from video with ffmpeg?
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To extract the audio stream without re-encoding:
ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac
-vn is no video.
-acodec copy says use the same audio stream that's already in there.
Read the output to see what codec it is, to set th...
PHP best way to MD5 multi-dimensional array?
...tioned prior, the following will work.
md5(serialize($array));
However, it's worth noting that (ironically) json_encode performs noticeably faster:
md5(json_encode($array));
In fact, the speed increase is two-fold here as (1) json_encode alone performs faster than serialize, and (2) json_encod...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
It is possible to create a primary key or unique index within a SQL Server CREATE TABLE statement. Is it possible to create a non-unique index within a CREATE TABLE statement?
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Changing website favicon dynamically
...ntsByTagName('head')[0].appendChild(link);
})();
Firefox should be cool with it.
edited to properly overwrite existing icons
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How do I parse XML in Python?
I have many rows in a database that contains XML and I'm trying to write a Python script to count instances of a particular node attribute.
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How to get current time and date in Android
...);
There are plenty of constants in Calendar for everything you need.
Edit:
Check Calendar class documentation
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Custom thread pool in Java 8 parallel stream
Is it possible to specify a custom thread pool for Java 8 parallel stream ? I can not find it anywhere.
15 Answers
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When should I use cross apply over inner join?
...SS APPLY
CROSS APPLY works better on things that have no simple JOIN condition.
This one selects 3 last records from t2 for each record from t1:
SELECT t1.*, t2o.*
FROM t1
CROSS APPLY
(
SELECT TOP 3 *
FROM t2
WHERE t2.t1_id = t1.id
ORDER BY
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Is cout synchronized/thread-safe?
In general I assume that streams are not synchronized, it is up to the user to do appropriate locking. However, do things like cout get special treatment in the standard library?
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How do I specify the exit code of a console application in .NET?
I have a trivial console application in .NET. It's just a test part of a larger application. I'd like to specify the "exit code" of my console application. How do I do this?
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