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Fetch frame count with ffmpeg
...nstead:
ffmpeg -i input.mkv -map 0:v:0 -c copy -f null -
This is a somewhat fast method.
Refer to frame= near the end of the console output.
Add the -discard nokey input option (before -i) to only count key frames.
Edit lists
Ignore the MP4/M4V/M4A/MOV edit list with the -ignore_editlist 1 in...
Rolling or sliding window iterator?
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@TakenMacGuy: I dunno what the author of that recipe's reasoning is, but I'd also choose 2. 2 is the smallest useful window size (otherwise you're just iterating and don't need the window), and it is also common to need to know the previous (or ne...
Finding local IP addresses using Python's stdlib
...ines having the hostname in /etc/hosts as 127.0.0.1), a paliative would be what gimel shows, use socket.getfqdn() instead. Of course your machine needs a resolvable hostname.
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How to replace all occurrences of a string?
...king about performance. When I did wonder which was more efficient, and by what margin, I used it as an excuse to find out.
On my Chrome Windows 8 machine, the regular expression based implementation is the fastest, with the split and join implementation being 53% slower. Meaning the regular expre...
How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
...key(1), locks key(2);
it will be impossible to get a deadlock.
So this is what I suggest:
Make sure you have no other queries that lock access more than one key at a time except for the delete statement. if you do (and I suspect you do), order their WHERE in (k1,k2,..kn) in ascending order.
Fix y...
Load HTML file into WebView
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What is data variable? Please provide an example.
– IgorGanapolsky
Nov 2 '17 at 20:39
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Retrieve the commit log for a specific line in a file?
... "$browser_path" $NEWTAB "$@" &
And you want to know the history of what is now line 155.
Then, use git log. Here, -L 155,155:git-web--browse.sh means "trace the evolution of lines 155 to 155 in the file named git-web--browse.sh".
$ git log --pretty=short -u -L 155,155:git-web--browse.sh
co...
How do I reattach to a detached mosh session?
... @Jordan: On some systems (Solaris, for example), killall does exactly what it says.
– Paused until further notice.
Jan 12 '15 at 15:44
4
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How to enter quotes in a Java string?
...our comment after Ian Henry's answer, I'm not quite 100% sure I understand what you are asking.
If it is about getting double quote marks added into a string, you can concatenate the double quotes into your string, for example:
String theFirst = "Java Programming";
String ROM = "\"" + theFirst + "...
Is there a Null OutputStream in Java?
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Since Java 11, there is a static utility that does exactly what you need, a static factory method OutputStream.nullOutputStream():
Returns a new OutputStream which discards all bytes. The returned stream is initially open. The stream is closed by calling the close() method. Subse...