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Fetch frame count with ffmpeg
...0]Cannot parallelize deblocking type 1, decoding such frames in
sequential order
frame= 49 fps= 24 q=26.0 size= 4kB time=0.28 bitrate= 118.1kbits/s
frame= 56 fps= 22 q=23.0 size= 4kB time=0.56 bitrate= 62.9kbits/s
Once you have the time, it is simple math: time / durration ...
How to combine two or more querysets in a Django view?
...It retains all the functions of the querysets which is nice if you want to order_by or similar.
Please note: this doesn't work on querysets from two different models.
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CSRF protection with CORS Origin header vs. CSRF token
... send a request with a spoofed referer header from the victim's machine in order to execute an attack.
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What is a semaphore?
...task to another. A mutex is meant to be taken and released, always in that order, by each task that uses the shared resource it protects. By contrast, tasks that use semaphores either signal or wait—not both. For example, Task 1 may contain code to post (i.e., signal or increment) a particular sem...
How to return multiple objects from a Java method?
...g the names and the values the objects (unless your objects have specified order, in which case a NavigableMap might be what you want.
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Django select only rows with duplicate field values
...ects.values('name')
.annotate(Count('id'))
.order_by()
.filter(id__count__gt=1)
This is as close as you can get with Django. The problem is that this will return a ValuesQuerySet with only name and count. However, you can then use this to construct a r...
Styling an input type=“file” button
...ut element. (The label's for attribute must match the file element's id in order for this to work).
<label for="file-upload" class="custom-file-upload">
Custom Upload
</label>
<input id="file-upload" type="file"/>
As an alternative, you could also just wrap the file input elem...
Find nearest latitude/longitude with an SQL query
...S(latitude / 57.3), 2)) AS distance
FROM TableName HAVING distance < 25 ORDER BY distance;
where [starlat] and [startlng] is the position where to start measuring the distance.
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How to handle multiple cookies with the same name?
...is to say:
The user agent SHOULD sort the cookie-list in the following order:
Cookies with longer paths are listed before cookies with shorter paths.
NOTE: Not all user agents sort the cookie-list in this order, but this
order reflects common practice when this document was wri...
How does the static modifier affect this code?
... part of declaration. Declaration happens before assignment no matter what order you present them in. A obj = new A(); int num1; int num2 = 0; gets turned into this: A obj; int num1; int num2; obj = new A(); num2 = 0;. Java does this so num1, num2 are defined by the time you reach the new A() constr...