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How to concatenate two MP4 files using FFmpeg?
...ethod with formats that support file level concatenation
(MPEG-1, MPEG-2 PS, DV). Do not use with MP4.
ffmpeg -i "concat:input1|input2" -codec copy output.mkv
This method does not work for many formats, including MP4, due to the nature of these formats and the simplistic concatenation performed...
Should IBOutlets be strong or weak under ARC?
...g should be the default and that the developer docs are being updated.
https://twitter.com/_danielhall/status/620716996326350848
https://twitter.com/_danielhall/status/620717252216623104
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How do you use Mongoose without defining a schema?
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PS: You have to do thing.set(key, value) because thing.key=value doesn't work with this method, i.e. it doesn't persist changed into the database otherwise.
– laggingreflex
Mar 18 '15 at...
Differences between “java -cp” and “java -jar”?
...fest, not as a -cp argument.
You can find more about this here and here.
PS: -cp and -classpath are synonyms.
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When to use Vanilla JavaScript vs. jQuery?
...concepts like chaining, implied iteration, etc, to simplify working on groups of elements together.
Learning jQuery is no substitute for learning JavaScript. You should have a firm basis in the latter so that you fully appreciate what knowing the former is making easier for you.
-- Edited to enco...
Are SVG parameters such as 'xmlns' and 'version' needed?
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Does it need to be http or can it be https as well?
– JohannesB
May 25 '17 at 19:27
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Change key pair for ec2 instance
...).
If you still have SSH access, please use one of the answers below.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#replacing-lost-key-pair
Here is what I did, thanks to Eric Hammond's blog post:
Stop the running EC2 instance
Detach its /dev/xvda1 volume (let's call it ...
Example of Named Pipes
...itHub: Named Pipe Wrapper for .NET 4.0
To use first install the package:
PS> Install-Package NamedPipeWrapper
Then an example server (copied from the link):
var server = new NamedPipeServer<SomeClass>("MyServerPipe");
server.ClientConnected += delegate(NamedPipeConnection<SomeClass&...
What is the difference between String and string in C#?
...use string or String in their code. Because in C# the string (a keyword) maps exactly to System.String (an FCL type), there is no difference and either can be used.
In C#, long maps to System.Int64, but in a different programming language, long could map to an Int16 or Int32. In fact, C++/CLI does...
How to re-raise an exception in nested try/except blocks?
...ood to know, though unfortunately one cannot rely on 3.5+ being installed. PS: ff verstehen nicht-Deutsche vermutlich nicht ;)
– Tobias Kienzler
Apr 26 '17 at 5:45
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