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How to create a video from images with FFmpeg?
...tead of -r for the output framerate
ffmpeg -r 1/5 -i img%03d.png -c:v libx264 -vf fps=25 -pix_fmt yuv420p out.mp4
Alternatively the format video filter can be added to the filter chain to replace -pix_fmt yuv420p like "fps=25,format=yuv420p". The advantage of this method is that you can contr...
What is the purpose of Order By 1 in SQL select statement?
...YMENT_DATE
It's not a recommended practice, because:
It's not obvious/explicit
If the column order changes, the query is still valid so you risk ordering by something you didn't intend
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Python constructors and __init__
...tiple functions with the same name but different arguments.
In your code example, you're not overloading __init__(). What happens is that the second definition rebinds the name __init__ to the new method, rendering the first method inaccessible.
As to your general question about constructors, Wiki...
Linq to Entities join vs groupjoin
...ve web searched but I still cant find a simple answer. Can someone please explain (in simple English) what a GroupJoin is? How is it different from a regular inner Join ? Is it commonly used? Is it only for method syntax? What about query syntax? A c# code example would be nice.
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iPhone App Icons - Exact Radius?
...rying to create the icon for my iPhone app, but don't know how to get the exact radius that the iPhone's icons use. I've searched and searched for a tutorial or a template but can't find one.
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The tilde operator in C
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Bitwise NOT is useful for a number of things, for example, bit masks. I am not sure what you mean by unsigned to signed integer conversion.
– GWW
Oct 20 '15 at 18:15
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas
The whole question fits in the title. And to add some context: I'm not asking what is the best according to what the specs are saying, but rather what works the best given the mix of browsers deployed nowadays.
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What does ||= (or-equals) mean in Ruby?
...ted assignments" of the Ruby Language Draft Specification.
As a first approximation,
a ||= b
is equivalent to
a || a = b
and not equivalent to
a = a || b
However, that is only a first approximation, especially if a is undefined. The semantics also differ depending on whether it is a simple variab...
【AI2+AI】人工智能舞姿识别App - 创客硬件开发 - 清泛IT社区，为创新赋能！
...文件中给出的默认尺寸。注意，组件面板最底部是PosenetExtension，这是我们用来跟踪身体关键点的AI技术，它可以帮助你构建身体的骨骼版本。3. PoseNet 关键点PoseNet追踪的身体关键点是:眼睛、耳朵、鼻子、肩膀、手肘、手腕、臀...