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How can I extract a good quality JPEG image from a video file with ffmpeg?

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Multi-line commands in GHCi

... answered Dec 9 '11 at 8:52 Nicolas WuNicolas Wu 4,26722 gold badges2222 silver badges3232 bronze badges ...
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Using “like” wildcard in prepared statement

... 282 You need to set it in the value itself, not in the prepared statement SQL string. So, this s...
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How to sort a dataFrame in python pandas by two or more columns?

... deprecated in favor of sort_values. sort was completely removed in the 0.20.0 release. The arguments (and results) remain the same: df.sort_values(['a', 'b'], ascending=[True, False]) You can use the ascending argument of sort: df.sort(['a', 'b'], ascending=[True, False]) For example: In ...
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[A]System.Web.WebPages.Razor.Configuration.HostSection cannot be cast to… web.config issue

... 274 I am using VS2013, MVC 5.2.2.0, Web Api 2. I have just changed the all versions from 2.0.0.0 t...
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What is the list of possible values for navigator.platform as of today? [closed]

...er is running a browser compiled for 16-bit, even though the user is on a 32-bit or 64-bit Windows machine. Of course W3Schools lists the old definition (I'm not even gonna link to them). W3 and MDN have agreed on a different definition though: navigator.platform represents the platform on which th...
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Set timeout for ajax (jQuery)

... | edited Mar 7 '11 at 21:53 answered Mar 7 '11 at 21:43 ...
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How to limit UITableView row reordering to a section

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Why is MySQL's default collation latin1_swedish_ci?

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How do I calculate the normal vector of a line segment?

Suppose I have a line segment going from (x1,y1) to (x2,y2). How do I calculate the normal vector perpendicular to the line? ...