Creating a Time Lapse with Jpeg Photo

ffmpeg -i '%*.JPG' -r 30 -q:v 2 timelapse.mp4

For iMovie

ffmpeg -i '%*.JPG' -r 30 -q:v 2 -pix_fmt yuv420p  timelapse.mp4

Merge videos into one

cat list.txt

file 'GOPR4922.MP4'
file 'GP014922.MP4'
file 'GP024922.MP4'

ffmpeg -f concat -i list.txt -c copy merged.mp4

Speedup video by X4

ffmpeg -i input.mp4 -strict -2 -vf "setpts=0.25*PTS" outputX4.mp4

Select a section from a video (minutes 26-32:10)

ffmpeg -i merged.mp4 -ss 00:26:00 -to 00:32:10 -c:v copy -c:a copy part2.mp4

Merge MTS files from a video camera

ffmpeg -i "concat:00000.MTS|00001.MTS|00002.MTS|00003.MTS|00004.MTS|00005.MTS|00006.MTS" output.mp4