GoPro 'chapters' are footage around 4 GB - The camera starts a new file every ~ 10 minutes.
If you have media files with exactly the same codec and codec parameters you can concatenate them quite easily.
Fastest way, that I found, is use ffmpeg with concating function,
but there is one unnecessary step with mylist.txt, the list of all files, you want to have concatenated.
for f in *.MP4; do echo "file '$PWD/$f'"; done > mylist.txt
If your shell supports process substitution (like Bash and Zsh), you can avoid explicitly creating a list file and do the whole thing in a single line:
ffmpeg -f concat -safe 0 -i <(for f in *.MP4; do echo "file '$PWD/$f'"; done) -c copy output.mp4
Here is also nice bash function, that can be put to your .bash_profile:
function video-concat() {
ffmpeg -f concat -safe 0 -i <(for f in ${@:1:${#}-1}; do echo "file '$PWD/$f'"; done) -c copy $_
}
Then you can call video-concat function as follow:
video-concat *.MP4 output.mp3
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title></title>
</head>
<body>
<embed type="text/html" id="response" scrolling="no" style="height: 640px; width:100%;">
</body>
</html>
(async function() {
const embedResponse = document.getElementById('response');
try {
// clean content first
embedResponse.setAttribute('src', 'data:text/html;charset=utf-8,');
const response = await fetch('/api/response',
{
method: 'post',
// accept HTML response
headers: {
'Accept': 'application/json, text/plain, */*',
'Content-Type': 'application/json'
},
// sent data if needed
body: JSON.stringify({data: ''})
});
// encode HTML response
const html = await response.text();
embedResponse.setAttribute('src', 'data:text/html;charset=utf-8,' + encodeURIComponent(html));
} catch (e) {
// catch errors and show them
embedResponse.setAttribute('src', 'data:text/html;charset=utf-8,' + encodeURIComponent(e));
console.error(e);
}
})();
There is another option, you can display HTML in new window as blob data:
const content = URL.createObjectURL(new Blob([response.data + overlay || ''], {type: "text/html"}));
window.open(content, "response", `width=640, height=480`).focus();
function versus(callable $first, callable $second, $repeat = 100000) {
$f = microtime(true);
foreach (range(0, $repeat) as $r) call_user_func($first);
$firstTimer = microtime(true) - $f;
$s = microtime(true);
foreach (range(0, $repeat) as $r) call_user_func($second);
$secondTimer = microtime(true) - $s;
printf(
'%s function is %.2f%% faster (%f vs %f)',
$firstTimer < $secondTimer ? 'First' : 'Second',
abs((($firstTimer - $secondTimer) / $firstTimer) * 100),
$firstTimer, $secondTimer
);
}
versus(
function () {
$str = '!loremipsum';
return substr($str, 0, 1) === '!';
},
function () {
$str = '!loremipsum';
return $str[0] === '!';
}
);
Will print:
Second function is 36.72% faster (0.142766 vs 0.090349)