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Finding the index of elements based on a condition using python list comprehension
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answered Sep 1 '11 at 13:20
Mike GrahamMike Graham
60.5k1212 gold badges8484 silver badges119119 bronze badges
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How can I extract a good quality JPEG image from a video file with ffmpeg?
...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 will work with any vid...
Get the index of the nth occurrence of a string?
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10 Answers
10
Active
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How to get element by classname or id
... to access the DOM reference instead of the the jqLite reference - element[0] instead of element:
link: function (scope, element, attrs) {
var elementResult = element[0].getElementsByClassName('multi-files');
}
Alternatively you can use the document.querySelector function (need the period here...
Anonymous recursive PHP functions
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answered Mar 19 '10 at 20:03
Derek HDerek H
10.2k66 gold badges3232 silver badges3838 bronze badges
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'str' object does not support item assignment in Python
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105
In Python, strings are immutable, so you can't change their characters in-place.
You can, howe...
Adding iOS UITableView HeaderView (not section header)
...ht; }
– panthor314
Aug 26 '16 at 20:01
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show 2 more comments
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Is there a way to check if int is legal enum in C#?
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280
Check out Enum.IsDefined
Usage:
if(Enum.IsDefined(typeof(MyEnum), value))
MyEnum a = (MyEn...
Why does Math.Round(2.5) return 2 instead of 3?
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570
Firstly, this wouldn't be a C# bug anyway - it would be a .NET bug. C# is the language - it does...
How can I round to whole numbers in JavaScript?
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edited Aug 6 '11 at 16:10
Jeremy
21k44 gold badges6161 silver badges7777 bronze badges
answered Aug 6 ...