大约有 40,100 项符合查询结果（耗时：0.0655秒） [XML]
How can I extract a good quality JPEG image from a video file with ffmpeg?
... the default is -qmin 2).
To output a series of images:
ffmpeg -i input.mp4 -qscale:v 2 output_%03d.jpg
See the image muxer documentation for more options involving image outputs.
To output a single image at ~60 seconds duration:
ffmpeg -ss 60 -i input.mp4 -qscale:v 4 -frames:v 1 output.jpg
This ...
What does each of the [y,n,q,a,d,/,K,j,J,g,e,?] stand for in context of git -p
...s staged.
– Alexander Bird
Oct 20 '14 at 21:39
I use -p for stashing, didn't know you could use this for add too! Just...
What are the differences between the BLOB and TEXT datatypes in MySQL?
...
answered Jul 24 '12 at 5:45
DarceyDarcey
1,67111 gold badge1212 silver badges1919 bronze badges
...
Which data type for latitude and longitude?
...
144
You can use the data type point - combines (x,y) which can be your lat / long. Occupies 16 byte...
Is there a way to zoom the Visual Studio text editor with a keyboard shortcut?
...
Michael Mrozek
141k2424 gold badges151151 silver badges159159 bronze badges
answered Jun 22 '10 at 19:54
BrandonBrand...
Running multiple commands in one line in shell
...
824
You are using | (pipe) to direct the output of a command into another command. What you are look...
Reload the path in PowerShell
...
answered Aug 6 '15 at 1:44
mpenmpen
223k212212 gold badges734734 silver badges10661066 bronze badges
...
In CMake, how can I test if the compiler is Clang?
...
249
A reliable check is to use the CMAKE_<LANG>_COMPILER_ID variables. E.g., to check the C++...
Express.js - app.listen vs server.listen
...eating an app using Express.js and starting the app listening on port 1234, for example:
5 Answers
...
Why does `a == b or c or d` always evaluate to True?
...e == "Kevin" or name == "Jon" or name == "Inbar"', setup="name='Inbar'")
0.4247764749999945
>>> timeit.timeit('name in {"Kevin", "Jon", "Inbar"}', setup="name='Inbar'")
0.18493307199999265
For those who may want proof that if a == b or c or d or e: ... is indeed parsed like this. The buil...