大约有 3,516 项符合查询结果（耗时：0.0147秒） [XML]
How can I extract a good quality JPEG image from a video file with ffmpeg?
...rol quality
Use -qscale:v (or the alias -q:v) as an output option.
Normal range for JPEG is 2-31 with 31 being the worst quality.
The scale is linear with double the qscale being roughly half the bitrate.
Recommend trying values of 2-5.
You can use a value of 1 but you must add the -qmin 1 output o...
Effect of a Bitwise Operator on a Boolean in Java
...gers, longs, chars this makes sense. These variables can contain the full range of values enforced by their size.
4 Answ...
What are bitwise operators?
...ctive.
bitwise shifting works only with +ve number
Also there is a wide range of use of bitwise logic
Maven check for updated dependencies in repository
...sions-maven-plugin/
http://docs.codehaus.org/display/MAVEN/Mercury+Version+Ranges
share
|
improve this answer
|
follow
|
...
How to do error logging in CodeIgniter (PHP)
...ages you want in a config file.
i.e $config['log_threshold'] = [log_level ranges 0-4];
share
|
improve this answer
|
follow
|
...
What is time_t ultimately a typedef to?
...ime_t as an arithmetic type, but does
not specify any particular type,
range, resolution, or encoding for it.
Also unspecified are the meanings of
arithmetic operations applied to time
values.
Unix and POSIX-compliant systems implement the time_t type as a signed
integer (typically ...
What is HTML5 ARIA?
...of certain things that are not native to HTML. The information exposed can range from something as simple as telling a screen reader that activating a link or button just showed or hid more items, to widgets as complex as whole menu systems or hierarchical tree views.
This is achieved by applying r...
Moving average or running mean
...ution can become a problem if x contains floats. Example: running_mean(np.arange(int(1e7))[::-1] + 0.2, 1)[-1] - 0.2 returns 0.003125 while one expects 0.0. More information: en.wikipedia.org/wiki/Loss_of_significance
– Milan
Dec 7 '17 at 11:08
...
Why does the indexing start with zero in 'C'?
...ally make for simpler implementation. Witness Pascal where you can use any range for indexing IIRC, it has been 25 years ;)
– nyholku
Apr 12 '18 at 13:54
add a comment
...
Why does this code using random strings print “hello world”?
...
@OneTwoThree nextInt(27) means within the range [0, 26].
– Eng.Fouad
Mar 3 '13 at 21:48
30
...