大约有 47,000 项符合查询结果（耗时：0.0503秒） [XML]
Fetch frame count with ffmpeg
...below.
ffprobe: Query the container
ffprobe -v error -select_streams v:0 -show_entries stream=nb_frames -of default=nokey=1:noprint_wrappers=1 input.mp4
This is a fast method.
Not all formats (such as Matroska) will report the number of frames resulting in the output of N/A. See the other met...
Crontab Day of the Week syntax
In crontab does the Day of the Week field run from 0 - 6 or 1 -7 ?
3 Answers
3
...
Determine the path of the executing BASH script [duplicate]
...etermine the directory path of the currently executing script using %~dp0 . For example:
5 Answers
...
Is there a way to list pip dependencies/requirements?
...m providing an updated answer.
This was tested with pip versions 8.1.2, 9.0.1, 10.0.1, and 18.1.
To get the output without cluttering your current directory on Linux use
pip download [package] -d /tmp --no-binary :all: -v
-d tells pip the directory that download should put files in.
Better, ju...
Finding the max value of an attribute in an array of objects
...
808
To find the maximum y value of the objects in array:
Math.max.apply(Math, array.map(function(o...
What does value & 0xff do in Java?
... = value;
then result would end up with the value ff ff ff fe instead of 00 00 00 fe. A further subtlety is that the & is defined to operate only on int values1, so what happens is:
value is promoted to an int (ff ff ff fe).
0xff is an int literal (00 00 00 ff).
The & is applied to yield...
Check whether number is even or odd
...
204
You can use the modulus operator, but that can be slow. If it's an integer, you can do:
if ( (...
Format output string, right alignment
...r.format syntax:
line_new = '{:>12} {:>12} {:>12}'.format(word[0], word[1], word[2])
And here's how to do it using the old % syntax (useful for older versions of Python that don't support str.format):
line_new = '%12s %12s %12s' % (word[0], word[1], word[2])
...
MySQL Update Inner Join tables query
I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:
...
How do I get the real .height() of a overflow: hidden or overflow: scroll div?
...
Use the .scrollHeight property of the DOM node: $('#your_div')[0].scrollHeight
share
|
improve this answer
|
follow
|
...