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How to do something to each file in a directory with a batch script
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Another way:
for %f in (*.mp4) do call ffmpeg -i "%~f" -vcodec copy -acodec copy "%~nf.avi"
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Change text color based on brightness of the covered background area?
...swered Aug 8 '12 at 15:38
Alex BallAlex Ball
3,73622 gold badges1313 silver badges2121 bronze badges
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Plot a legend outside of the plotting area in base graphics?
...in plot with bty='L' you'll have some space on the right for a legend. Normally this would get clipped to the plot region, but do par(xpd=TRUE) and with a bit of adjustment you can get a legend as far right as it can go:
set.seed(1) # just to get the same random numbers
par(xpd=FALSE) # this is u...
How can a string be initialized using “ ”?
... to improve the performance of the language. Primitives are stored in the call stack, which require less storage spaces and are cheaper to manipulate. On the other hand, objects are stored in the program heap, which require complex memory management and more storage spaces.
For performance reas...
Assign pandas dataframe column dtypes
... of multiple columns in pd.Dataframe (I have a file that I've had to manually parse into a list of lists, as the file was not amenable for pd.read_csv )
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Get MD5 hash of big files in Python
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@Boris, you can't actually say that BLAKE2 is secure. All you can say is that it hasn't been broken yet.
– vy32
Apr 8 at 14:57
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Convert hex to binary
...gits and leading zeroes).
Short answer:
The new f-strings in Python 3.6 allow you to do this using very terse syntax:
>>> f'{0xABC123EFFF:0>42b}'
'001010101111000001001000111110111111111111'
or to break that up with the semantics:
>>> number, pad, rjust, size, kind = 0xAB...
Problems with Android Fragment back stack
...Replace an existing fragment that was added to a container. This is essentially the same as calling remove(Fragment) for all currently added fragments that were added with the same containerViewId and then add(int, Fragment, String) with the same arguments given here.
then what's happening is like...
curl POST format for CURLOPT_POSTFIELDS
... it should be key=>value paired and the Content-type header is automatically set to multipart/form-data.
Also, you don't have to create extra functions to build the query for your arrays, you already have that:
$query = http_build_query($data, '', '&');
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How can you iterate over the elements of an std::tuple?
...rloads for every type the tuple might contain. This works best if you know all the tuple elements will share a common base class or something similar.
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