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How to concatenate two MP4 files using FFmpeg?
...
for MP4 files:
If they are not exactly same (100% same codec, same resolution, same type) MP4 files, then you have to trans-code them into intermediate streams at first:
ffmpeg -i myfile1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts temp1.ts
ffmpeg -i myfile2.mp4 -c c...
How can I get a count of the total number of digits in a number?
...= 0)
{
if (n < 10) return 1;
if (n < 100) return 2;
if (n < 1000) return 3;
if (n < 10000) return 4;
if (n < 100000) return 5;
if (n < 1000000) return 6;
if (n < 10000000) return 7;
...
How do I vertically center text with CSS? [duplicate]
...
You can try this basic approach:
div {
height: 100px;
line-height: 100px;
text-align: center;
border: 2px dashed #f69c55;
}
<div>
Hello World!
</div>
It only works for a single line of text though, because we set the line's height to the ...
How can I keep Bootstrap popovers alive while being hovered?
...ength) {
$(_this).popover("hide")
}
}, 100);
});
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How do I determine the size of an object in Python?
...terpret this? Well say you have a set with 10 items in it. If each item is 100 bytes each, how big is the whole data structure? The set is 736 itself because it has sized up one time to 736 bytes. Then you add the size of the items, so that's 1736 bytes in total
Some caveats for function and class d...
List changes unexpectedly after assignment. How do I clone or copy it to prevent this?
... == '__main__':
import copy
from time import time
num_times = 100000
L = [None, 'blah', 1, 543.4532,
['foo'], ('bar',), {'blah': 'blah'},
old_class(), new_class()]
t = time()
for i in xrange(num_times):
Copy(L)
print 'Custom Copy:', time()-t
...
Why is `[` better than `subset`?
...ironment:
cyl <- 4
subscramble(mtcars, cyl == 4)
cyl <- sample(10, 100, rep = T)
subscramble(mtcars, cyl == 4)
(Run them and see for yourself, it's pretty crazy.)
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Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...kan,
cfFileMapping;
{$IFNDEF CONSOLE}
const
WM_IW_LOGMSG = WM_USER + 1001;
{$ENDIF}
type
TMirrorDrive = class(TThread)
protected
FRootDirectory: string;
FDokanOperations: TDokanOperations;
FDokanOptions: TDokanOptions;
{$IFNDEF CONSOLE}
FHandle: THandle;
{$ENDIF}
procedure Execute...
How do I keep CSS floats in one line?
...iv> that uses this cross-browser min-width hack:
.minwidth { min-width:100px; width: auto !important; width: 100px; }
You may also need to set "overflow" but probably not.
This works because:
The !important declaration, combined with min-width cause everything to stay on the same line in IE...
Deciding between HttpClient and WebClient
...t
{00:00:04.0761359}====>WebClient
---------------------Stage 4 ---- 100 sync Request--Small Size
{00:03:23.6268086}====>HttpClinet
{00:00:47.1406632}====>WebRequest
{00:01:01.2319499}====>WebClient
---------------------Stage 5 ---- 10 sync Request--Max Size
{00:00:58.1804677}==...