Intro
Editng and Processing with FFMPEG and Imagemagick is fairly strait forword. Process your clips, concatenate, and compress. You need to make sure all you footage and title cards are the same resolution, framerate, and audio settings. You can convert the files when you first compress them to your working format.
Formats
Lossless Raw Video Format for editing.
ffmpeg -i input.mp4 -vcodec ffv1 -acodec pcm_s16le output.mkv
A good lossy video format that is great for slower computers is Mpeg2.
ffmpeg -y -i final.mkv -vcodec mpeg2video -q 2 -acodec pcm_s16le output.mkv
Connect a list of videos.
First make a list like so:
# this is a comment
file '/path/to/file1'
file '/path/to/file2'
file '/path/to/file3'
Then run the concat.
ffmpeg -f concat -i mylist.txt -c copy output
Trim Videos
ffmpeg -i input.mp4 -ss 00:00:30.0 -c copy -t 00:00:10.0 output.mkv
Stablize Video
ffmpeg -y -i input.mp4 -vf deshake=edge=0,crop="in_w-2*16:in_h-2*16",scale=w=1920:h=1080 -vcodec ffv1 -acodec pcm_s16le output.mkv
Extreme Stabizing
ffmpeg -y -i input.mp4 -vf deshake=edge=0:rx=32:ry=32,crop="in_w-2*32:in_h-2*32",scale=w=1920:h=1080 -vcodec ffv1 -acodec pcm_s16le output.mkv
Fade In and Out
ffmpeg -i input.mp4 -vf fade=in:0:30,fade=out:290:320 output.mkv
Title Cards
Make a 4 second silence track for the titles
ffmpeg -f lavfi -i aevalsrc=0:0::duration=4 quiet.wav
Generate an image for the titles. You will need the TTF font in the same working directory.
convert -background black -fill white -font opensans.ttf -size 1920x1080 -pointsize 120 -gravity center label:'Title Here' title.png
This will merge the image and titles to a 4 second clip
ffmpeg -loop 1 -i title.png -i quiet.wav -c:v ffv1 -tune stillimage -c:a pcm_s16le -strict experimental -r 24 -b:a 192k -pix_fmt yuv420p -shortest title.mkv