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How can I extract a good quality JPEG image from a video file with ffmpeg?
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222
Use -qscale:v to control quality
Use -qscale:v (or the alias -q:v) as an output option.
Norma...
Difference between dispatch_async and dispatch_sync on serial queue?
...nt 2134 and 1243
– Matteo Gobbi
Mar 22 '14 at 14:37
my question is why not we didn't do it like the normal way? printf...
Never seen before C++ for loop
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answered Jul 31 '12 at 11:22
dasblinkenlightdasblinkenlight
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Which is the first integer that an IEEE 754 float is incapable of representing exactly?
... be accurately represented and will be rounded is:
For float, 16,777,217 (224 + 1).
For double, 9,007,199,254,740,993 (253 + 1).
>>> 9007199254740993.0
9007199254740992
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improve t...
How to list empty folders in linux
...-type d -empty | sort -u
– acme
Mar 22 '12 at 15:49
4
Incidentally, to remove: find . -type d -em...
Sort a list of tuples by 2nd item (integer value) [duplicate]
...ord with sorted().
sorted([('abc', 121),('abc', 231),('abc', 148), ('abc',221)], key=lambda x: x[1])
key should be a function that identifies how to retrieve the comparable element from your data structure. In your case, it is the second element of the tuple, so we access [1].
For optimization,...
When to create a new app (with startapp) in Django?
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Antti RasinenAntti Rasinen
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Converting dict to OrderedDict
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Martijn Pieters♦Martijn Pieters
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Run class in Jar file
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answered Jul 21 '11 at 18:22
BitmapBitmap
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What are these attributes: `aria-labelledby` and `aria-hidden`
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wittjeffwittjeff
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