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Fetch frame count with ffmpeg
... number. See Edit lists 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 o...
how to change default python version?
I have installed python 3.2 in my mac. After I run /Applications/Python 3.2/Update Shell Profile.command , it's confusing that when I type python -V in Terminal it says that Python 2.6.1 , how can I change the default python version?
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Is there a constraint that restricts my generic method to numeric types?
...m(1L, 2, 3, 4, 5);
NumericPolicies.Instance.Sum("www", "") // compile-time error.
The solution is compile-time safe. CityLizard Framework provides compiled version for .NET 4.0. The file is lib/NETFramework4.0/CityLizard.Policy.dll.
It's also available in Nuget: https://www.nuget.org/packages/Cit...
Two way sync with rsync
...torage, etc.
– alex
Jun 4 '15 at 10:05
3
@wener Don't use a hammer for a screw, or a screwdriver ...
From io.Reader to string in Go
.... Example:
buf := new(strings.Builder)
n, err := io.Copy(buf, r)
// check errors
fmt.Println(buf.String())
OUTDATED INFORMATION BELOW
The short answer is that it it will not be efficient because converting to a string requires doing a complete copy of the byte array. Here is the proper (non-ef...
Joining three tables using MySQL
...yntax, it is well worth your time to learn it. It will help you avoid JOIN errors like you have made in the future.
– RedFilter
Sep 14 '10 at 14:38
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round() doesn't seem to be rounding properly
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If you get this error NameError: global name 'ROUND_UP' is not defined you need to import your rounding function: from decimal import Decimal, ROUND_UP. Other rounding functions
– Stephen Blair
Jul 18 '...
Constant Amortized Time
What is meant by "Constant Amortized Time" when talking about time complexity of an algorithm?
6 Answers
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Reloading the page gives wrong GET request with AngularJS HTML5 mode
...t still it doesnt work. Refreshing the URL still gives the "404 NOT FOUND" error.
– kTn
Jul 5 '16 at 6:14
How do I red...
unix - head AND tail of file
...
answered Dec 24 '11 at 13:05
mahmah
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