ffmpeg -i videoplayback.mp4 -i audio.mp4 -c copy -map 0:0 -map 1:0 -shortest output.mp4

youtube-dl --extract-audio --audio-format flac https://www.youtube.com/watch?v=

cd ~/Downloads/ && scdl -l https://soundcloud.com/[user]/[track]

ffmpeg -framerate 24 -f image2 -s 1280x700 -start_number 80 -i pic%05d.png -vcodec libx264 -crf 25 -pix_fmt yuv420p output.mp4

ffmpeg -i input.ts -acodec copy -vcodec copy out.mp4    # re-warp video flux (broken container)

ffmpeg -i video.mp4 -vcodec copy -acodec copy -t 00:42:42 video.a.mp4 -vcodec copy -acodec copy -ss 00:42:42 video.b.mp4 # split video in two

echo "file 'video1.a.mp4'" >> vidlist.txt && echo "file 'video2.b.mp4'" >> vidlist.txt && ffmpeg -f concat -i vidlist.txt -c copy output1.mp4 && rm vidlist.txt # concatenate videos with same codec