Title:           [Bash] ffmpeg snippets
Author:          Anonymous
Pastebin link:   http://pastebin.com/tqE7CLvN
First Edit:      Sunday 6th of April 2014 09:41:47 AM CDT
Last Edit:       Sunday 6th of April 2014 09:41:47 AM CDT

#one pass
ffmpeg -i INPUT.mkv -b:v XXX -crf 4 -an -sn -quality good -cpu-used 0 -threads 0 OUTPUT.webm
_
 
#two pass
 
#test first 5 seconds
ffmpeg -y -ss 0 -t 5 -i INPUT.mkv -b:v XXX -crf 4 -an -sn -auto-alt-ref 1 -quality good -cpu-used 0 -threads 0 -pass 1 -f webm /dev/null
ffmpeg -y -ss 0 -t 5 -i INPUT.mkv -b:v XXX -crf 4 -an -sn -auto-alt-ref 1 -quality good -cpu-used 0 -threads 0 -pass 2 OUTPUT.webm
 
#encode the whole video
ffmpeg -i INPUT.mkv -b:v XXX -crf 4 -an -sn -auto-alt-ref 1 -quality good -cpu-used 0 -threads 0 -pass 1 -f webm -y /dev/null
ffmpeg -i INPUT.mkv -b:v XXX -crf 4 -an -sn -auto-alt-ref 1 -quality good -cpu-used 0 -threads 0 -pass 2 OUTPUT.webm
_
 
#cut
ffmpeg -ss TTT -t TTT -i INPUT.mkv -c copy OUTPUT.mkv
 
#strip audio/subs
ffmpeg -i INPUT.mkv -an -sn -c copy OUTPUT.mkv
 
#extract subs
ffmpeg -i INPUT.mkv -an -vn -c copy SUB.ass
 
#hardcode subs
 -vf ass=SUB.ass
 
#resolution
 -s 640x360 -sws_flags lanczos
 
#overwrite without prompt
 -y
 
#instant youtube
#it's usually going to be too big
youtube-dl -f 43 URL -o - | ffmpeg -i - -an -c copy OUTPUT.webm