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How can I extract a good quality JPEG image from a video file with ffmpeg?
...ion for more options involving image outputs.
To output a single image at ~60 seconds duration:
ffmpeg -ss 60 -i input.mp4 -qscale:v 4 -frames:v 1 output.jpg
This will work with any video input. See below if your input is MJPEG.
MJPEG
If your input is MJPEG (Motion JPEG) then the images can be ext...
JavaScript listener, “keypress” doesn't detect backspace?
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My numeric control:
function CheckNumeric(event) {
var _key = (window.Event) ? event.which : event.keyCode;
if (_key > 95 && _key < 106) {
return true;
}
else if (_key > 47 && _key < 58) {
return true;
}
else {
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Check whether variable is number or string in JavaScript
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SampsonSampson
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Maximum number of records in a MySQL database table
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65
mysql int types can do quite a few rows: http://dev.mysql.com/doc/refman/5.0/en/numeric-types.h...
How to get Url Hash (#) from server side
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6 Answers
6
Active
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How to change the foreign key referential action? (behavior)
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6 Answers
6
Active
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Order data frame rows according to vector with specific order
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236
Try match:
df <- data.frame(name=letters[1:4], value=c(rep(TRUE, 2), rep(FALSE, 2)))
target ...
Storing R.drawable IDs in XML array
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363
You use a typed array in arrays.xml file within your /res/values folder that looks like this:
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IIS_IUSRS and IUSR permissions in IIS8
I've just moved away from IIS6 on Win2003 to IIS8 on Win2012 for hosting ASP.NET applications.
6 Answers
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How do I decode HTML entities in Swift?
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161
This answer was last revised for Swift 5.2 and iOS 13.4 SDK.
There's no straightforward way ...