Difference between revisions of "Ffmpeg"
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| Line 3: | Line 3: | ||
* ffmpeg-php must be compiled by source | * ffmpeg-php must be compiled by source | ||
=Concatenate videos= | =Concatenate videos= | ||
| − | + | ffmpeg -i export_1.mp4 -i export_2.mp4 -i export_3.mp4 -i export_4.mp4 -filter_complex concat=n=4:v=1:a=0 -an output.mp4 | |
Note than n=v should be updated to match the proper count of videos. -an is for no audio | Note than n=v should be updated to match the proper count of videos. -an is for no audio | ||
| + | |||
=Creating Time Lapses= | =Creating Time Lapses= | ||
== From images == | == From images == | ||
Latest revision as of 15:50, 6 January 2018
Linux Installation
- rpm -Uvh http://apt.sw.be/redhat/el6/en/x86_64/rpmforge/RPMS/rpmforge-release-0.5.2-2.el6.rf.x86_64.rpm
- ffmpeg-php must be compiled by source
Concatenate videos
ffmpeg -i export_1.mp4 -i export_2.mp4 -i export_3.mp4 -i export_4.mp4 -filter_complex concat=n=4:v=1:a=0 -an output.mp4
Note than n=v should be updated to match the proper count of videos. -an is for no audio
Creating Time Lapses
From images
ffmpeg -r 30 -i img_%04d.jpg -sameq -s hd720 -vcodec libx264 -vpre hq -crf 25 ./output_30fps.mp4
Taking frames from a video
ffmpeg -i export_4_full.mp4 -vf select='not(mod(n\,1500))',setpts=N/FRAME_RATE/TB export_4.mp4
CLI Stuff
Mp3
Fade in and out
ffmpeg -i out.mp3 -af 'afade=t=in:ss=0:d=3,afade=t=out:st=129:d=7' promise_final.mp3
Trim size
ffmpeg -i promise.mp3 -ss 00:00:45 -t 00:02:16 ~/Desktop/out.mp3
Webm
HD, 14Mbps bitrate
ffmpeg -ss 01:18:02 -t 00:00:19 -i input.mkv -b:v 14M -c:v libvpx -an output.webm
Renaming Image Files Script
<?php
$ducks = glob("*.jpg");
$pref = "IMG_";
$suf = ".jpg";
$count = 0;
foreach($ducks as $duck)
{
$cmd = "mv $duck $pref" . str_pad($count, 4, 0, STR_PAD_LEFT) . $suf;
echo $cmd . "\n";
#system($cmd);
$count++;
}
?>